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1463 lines
39 KiB
1463 lines
39 KiB
#ifndef GIT_COMPAT_UTIL_H |
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#define GIT_COMPAT_UTIL_H |
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|
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#ifdef USE_MSVC_CRTDBG |
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/* |
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* For these to work they must appear very early in each |
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* file -- before most of the standard header files. |
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*/ |
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#include <stdlib.h> |
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#include <crtdbg.h> |
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#endif |
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|
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#define _FILE_OFFSET_BITS 64 |
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|
|
|
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/* Derived from Linux "Features Test Macro" header |
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* Convenience macros to test the versions of gcc (or |
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* a compatible compiler). |
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* Use them like this: |
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* #if GIT_GNUC_PREREQ (2,8) |
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* ... code requiring gcc 2.8 or later ... |
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* #endif |
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*/ |
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#if defined(__GNUC__) && defined(__GNUC_MINOR__) |
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# define GIT_GNUC_PREREQ(maj, min) \ |
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((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) |
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#else |
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#define GIT_GNUC_PREREQ(maj, min) 0 |
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#endif |
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|
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#ifndef FLEX_ARRAY |
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/* |
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* See if our compiler is known to support flexible array members. |
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*/ |
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#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580)) |
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# define FLEX_ARRAY /* empty */ |
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#elif defined(__GNUC__) |
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# if (__GNUC__ >= 3) |
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# define FLEX_ARRAY /* empty */ |
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# else |
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# define FLEX_ARRAY 0 /* older GNU extension */ |
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# endif |
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#endif |
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|
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/* |
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* Otherwise, default to safer but a bit wasteful traditional style |
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*/ |
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#ifndef FLEX_ARRAY |
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# define FLEX_ARRAY 1 |
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#endif |
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#endif |
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|
|
|
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/* |
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* BUILD_ASSERT_OR_ZERO - assert a build-time dependency, as an expression. |
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* @cond: the compile-time condition which must be true. |
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* |
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* Your compile will fail if the condition isn't true, or can't be evaluated |
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* by the compiler. This can be used in an expression: its value is "0". |
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* |
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* Example: |
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* #define foo_to_char(foo) \ |
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* ((char *)(foo) \ |
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* + BUILD_ASSERT_OR_ZERO(offsetof(struct foo, string) == 0)) |
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*/ |
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#define BUILD_ASSERT_OR_ZERO(cond) \ |
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(sizeof(char [1 - 2*!(cond)]) - 1) |
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|
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#if GIT_GNUC_PREREQ(3, 1) |
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/* &arr[0] degrades to a pointer: a different type from an array */ |
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# define BARF_UNLESS_AN_ARRAY(arr) \ |
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BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \ |
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__typeof__(&(arr)[0]))) |
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#else |
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# define BARF_UNLESS_AN_ARRAY(arr) 0 |
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#endif |
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/* |
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* ARRAY_SIZE - get the number of elements in a visible array |
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* @x: the array whose size you want. |
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* |
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* This does not work on pointers, or arrays declared as [], or |
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* function parameters. With correct compiler support, such usage |
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* will cause a build error (see the build_assert_or_zero macro). |
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*/ |
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x)) |
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|
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#define bitsizeof(x) (CHAR_BIT * sizeof(x)) |
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|
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#define maximum_signed_value_of_type(a) \ |
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(INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a))) |
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|
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#define maximum_unsigned_value_of_type(a) \ |
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(UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a))) |
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|
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/* |
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* Signed integer overflow is undefined in C, so here's a helper macro |
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* to detect if the sum of two integers will overflow. |
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* |
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* Requires: a >= 0, typeof(a) equals typeof(b) |
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*/ |
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#define signed_add_overflows(a, b) \ |
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((b) > maximum_signed_value_of_type(a) - (a)) |
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|
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#define unsigned_add_overflows(a, b) \ |
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((b) > maximum_unsigned_value_of_type(a) - (a)) |
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|
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/* |
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* Returns true if the multiplication of "a" and "b" will |
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* overflow. The types of "a" and "b" must match and must be unsigned. |
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* Note that this macro evaluates "a" twice! |
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*/ |
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#define unsigned_mult_overflows(a, b) \ |
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((a) && (b) > maximum_unsigned_value_of_type(a) / (a)) |
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|
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#ifdef __GNUC__ |
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#define TYPEOF(x) (__typeof__(x)) |
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#else |
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#define TYPEOF(x) |
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#endif |
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|
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#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits)))) |
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#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */ |
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|
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#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) |
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|
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/* Approximation of the length of the decimal representation of this type. */ |
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#define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) |
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|
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#ifdef __MINGW64__ |
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#define _POSIX_C_SOURCE 1 |
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#elif defined(__sun__) |
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/* |
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* On Solaris, when _XOPEN_EXTENDED is set, its header file |
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* forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE |
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* setting to say we are XPG5 or XPG6. Also on Solaris, |
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* XPG6 programs must be compiled with a c99 compiler, while |
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* non XPG6 programs must be compiled with a pre-c99 compiler. |
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*/ |
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# if __STDC_VERSION__ - 0 >= 199901L |
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# define _XOPEN_SOURCE 600 |
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# else |
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# define _XOPEN_SOURCE 500 |
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# endif |
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#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \ |
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!defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \ |
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!defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \ |
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!defined(__CYGWIN__) |
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#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ |
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#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ |
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#endif |
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#define _ALL_SOURCE 1 |
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#define _GNU_SOURCE 1 |
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#define _BSD_SOURCE 1 |
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#define _DEFAULT_SOURCE 1 |
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#define _NETBSD_SOURCE 1 |
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#define _SGI_SOURCE 1 |
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|
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#if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */ |
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# if !defined(_WIN32_WINNT) |
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# define _WIN32_WINNT 0x0600 |
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# endif |
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#define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */ |
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#include <winsock2.h> |
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#include <windows.h> |
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#define GIT_WINDOWS_NATIVE |
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#endif |
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|
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#include <unistd.h> |
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#include <stdio.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include <stddef.h> |
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#include <stdlib.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#ifdef HAVE_STRINGS_H |
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#include <strings.h> /* for strcasecmp() */ |
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#endif |
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#include <errno.h> |
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#include <limits.h> |
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#ifdef NEEDS_SYS_PARAM_H |
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#include <sys/param.h> |
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#endif |
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#include <sys/types.h> |
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#include <dirent.h> |
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#include <sys/time.h> |
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#include <time.h> |
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#include <signal.h> |
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#include <assert.h> |
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#include <regex.h> |
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#include <utime.h> |
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#include <syslog.h> |
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#if !defined(NO_POLL_H) |
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#include <poll.h> |
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#elif !defined(NO_SYS_POLL_H) |
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#include <sys/poll.h> |
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#else |
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/* Pull the compat stuff */ |
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#include <poll.h> |
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#endif |
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#ifdef HAVE_BSD_SYSCTL |
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#include <sys/sysctl.h> |
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#endif |
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|
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#if defined(__CYGWIN__) |
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#include "compat/win32/path-utils.h" |
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#endif |
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#if defined(__MINGW32__) |
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/* pull in Windows compatibility stuff */ |
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#include "compat/win32/path-utils.h" |
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#include "compat/mingw.h" |
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#elif defined(_MSC_VER) |
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#include "compat/win32/path-utils.h" |
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#include "compat/msvc.h" |
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#else |
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#include <sys/utsname.h> |
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#include <sys/wait.h> |
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#include <sys/resource.h> |
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#include <sys/socket.h> |
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#include <sys/ioctl.h> |
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#include <termios.h> |
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#ifndef NO_SYS_SELECT_H |
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#include <sys/select.h> |
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#endif |
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#include <netinet/in.h> |
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#include <netinet/tcp.h> |
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#include <arpa/inet.h> |
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#include <netdb.h> |
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#include <pwd.h> |
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#include <sys/un.h> |
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#ifndef NO_INTTYPES_H |
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#include <inttypes.h> |
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#else |
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#include <stdint.h> |
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#endif |
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#ifdef NO_INTPTR_T |
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/* |
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* On I16LP32, ILP32 and LP64 "long" is the safe bet, however |
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* on LLP86, IL33LLP64 and P64 it needs to be "long long", |
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* while on IP16 and IP16L32 it is "int" (resp. "short") |
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* Size needs to match (or exceed) 'sizeof(void *)'. |
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* We can't take "long long" here as not everybody has it. |
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*/ |
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typedef long intptr_t; |
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typedef unsigned long uintptr_t; |
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#endif |
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#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ |
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#include <grp.h> |
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#define _ALL_SOURCE 1 |
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#endif |
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|
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/* used on Mac OS X */ |
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#ifdef PRECOMPOSE_UNICODE |
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#include "compat/precompose_utf8.h" |
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#else |
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static inline const char *precompose_argv_prefix(int argc, const char **argv, const char *prefix) |
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{ |
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return prefix; |
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} |
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static inline const char *precompose_string_if_needed(const char *in) |
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{ |
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return in; |
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} |
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|
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#define probe_utf8_pathname_composition() |
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#endif |
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|
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#ifdef MKDIR_WO_TRAILING_SLASH |
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#define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b)) |
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int compat_mkdir_wo_trailing_slash(const char*, mode_t); |
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#endif |
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|
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#ifdef NO_STRUCT_ITIMERVAL |
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struct itimerval { |
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struct timeval it_interval; |
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struct timeval it_value; |
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}; |
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#endif |
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|
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#ifdef NO_SETITIMER |
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static inline int setitimer(int which, const struct itimerval *value, struct itimerval *newvalue) { |
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return 0; /* pretend success */ |
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} |
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#endif |
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|
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#ifndef NO_LIBGEN_H |
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#include <libgen.h> |
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#else |
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#define basename gitbasename |
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char *gitbasename(char *); |
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#define dirname gitdirname |
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char *gitdirname(char *); |
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#endif |
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|
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#ifndef NO_ICONV |
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#include <iconv.h> |
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#endif |
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|
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#ifndef NO_OPENSSL |
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#ifdef __APPLE__ |
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#define __AVAILABILITY_MACROS_USES_AVAILABILITY 0 |
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#include <AvailabilityMacros.h> |
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#undef DEPRECATED_ATTRIBUTE |
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#define DEPRECATED_ATTRIBUTE |
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#undef __AVAILABILITY_MACROS_USES_AVAILABILITY |
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#endif |
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#include <openssl/ssl.h> |
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#include <openssl/err.h> |
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#endif |
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|
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#ifdef HAVE_SYSINFO |
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# include <sys/sysinfo.h> |
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#endif |
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|
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/* On most systems <netdb.h> would have given us this, but |
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* not on some systems (e.g. z/OS). |
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*/ |
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#ifndef NI_MAXHOST |
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#define NI_MAXHOST 1025 |
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#endif |
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|
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#ifndef NI_MAXSERV |
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#define NI_MAXSERV 32 |
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#endif |
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|
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/* On most systems <limits.h> would have given us this, but |
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* not on some systems (e.g. GNU/Hurd). |
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*/ |
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#ifndef PATH_MAX |
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#define PATH_MAX 4096 |
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#endif |
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|
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typedef uintmax_t timestamp_t; |
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#define PRItime PRIuMAX |
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#define parse_timestamp strtoumax |
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#define TIME_MAX UINTMAX_MAX |
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#define TIME_MIN 0 |
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|
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#ifndef PATH_SEP |
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#define PATH_SEP ':' |
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#endif |
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|
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#ifdef HAVE_PATHS_H |
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#include <paths.h> |
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#endif |
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#ifndef _PATH_DEFPATH |
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#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin" |
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#endif |
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|
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#ifndef platform_core_config |
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static inline int noop_core_config(const char *var, const char *value, void *cb) |
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{ |
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return 0; |
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} |
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#define platform_core_config noop_core_config |
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#endif |
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|
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int lstat_cache_aware_rmdir(const char *path); |
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#if !defined(__MINGW32__) && !defined(_MSC_VER) |
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#define rmdir lstat_cache_aware_rmdir |
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#endif |
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|
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#ifndef has_dos_drive_prefix |
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static inline int git_has_dos_drive_prefix(const char *path) |
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{ |
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return 0; |
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} |
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#define has_dos_drive_prefix git_has_dos_drive_prefix |
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#endif |
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|
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#ifndef skip_dos_drive_prefix |
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static inline int git_skip_dos_drive_prefix(char **path) |
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{ |
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return 0; |
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} |
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#define skip_dos_drive_prefix git_skip_dos_drive_prefix |
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#endif |
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|
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#ifndef is_dir_sep |
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static inline int git_is_dir_sep(int c) |
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{ |
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return c == '/'; |
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} |
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#define is_dir_sep git_is_dir_sep |
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#endif |
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|
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#ifndef offset_1st_component |
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static inline int git_offset_1st_component(const char *path) |
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{ |
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return is_dir_sep(path[0]); |
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} |
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#define offset_1st_component git_offset_1st_component |
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#endif |
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|
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#ifndef is_valid_path |
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#define is_valid_path(path) 1 |
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#endif |
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|
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#ifndef is_path_owned_by_current_user |
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|
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#ifdef __TANDEM |
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#define ROOT_UID 65535 |
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#else |
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#define ROOT_UID 0 |
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#endif |
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|
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/* |
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* Do not use this function when |
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* (1) geteuid() did not say we are running as 'root', or |
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* (2) using this function will compromise the system. |
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* |
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* PORTABILITY WARNING: |
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* This code assumes uid_t is unsigned because that is what sudo does. |
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* If your uid_t type is signed and all your ids are positive then it |
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* should all work fine. |
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* If your version of sudo uses negative values for uid_t or it is |
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* buggy and return an overflowed value in SUDO_UID, then git might |
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* fail to grant access to your repository properly or even mistakenly |
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* grant access to someone else. |
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* In the unlikely scenario this happened to you, and that is how you |
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* got to this message, we would like to know about it; so sent us an |
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* email to git@vger.kernel.org indicating which platform you are |
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* using and which version of sudo, so we can improve this logic and |
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* maybe provide you with a patch that would prevent this issue again |
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* in the future. |
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*/ |
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static inline void extract_id_from_env(const char *env, uid_t *id) |
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{ |
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const char *real_uid = getenv(env); |
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|
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/* discard anything empty to avoid a more complex check below */ |
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if (real_uid && *real_uid) { |
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char *endptr = NULL; |
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unsigned long env_id; |
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|
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errno = 0; |
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/* silent overflow errors could trigger a bug here */ |
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env_id = strtoul(real_uid, &endptr, 10); |
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if (!*endptr && !errno) |
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*id = env_id; |
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} |
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} |
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|
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static inline int is_path_owned_by_current_uid(const char *path) |
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{ |
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struct stat st; |
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uid_t euid; |
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|
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if (lstat(path, &st)) |
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return 0; |
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|
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euid = geteuid(); |
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if (euid == ROOT_UID) |
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{ |
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if (st.st_uid == ROOT_UID) |
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return 1; |
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else |
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extract_id_from_env("SUDO_UID", &euid); |
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} |
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|
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return st.st_uid == euid; |
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} |
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|
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#define is_path_owned_by_current_user is_path_owned_by_current_uid |
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#endif |
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|
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#ifndef find_last_dir_sep |
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static inline char *git_find_last_dir_sep(const char *path) |
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{ |
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return strrchr(path, '/'); |
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} |
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#define find_last_dir_sep git_find_last_dir_sep |
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#endif |
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|
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#ifndef has_dir_sep |
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static inline int git_has_dir_sep(const char *path) |
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{ |
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return !!strchr(path, '/'); |
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} |
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#define has_dir_sep(path) git_has_dir_sep(path) |
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#endif |
|
|
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#ifndef query_user_email |
|
#define query_user_email() NULL |
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#endif |
|
|
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#ifdef __TANDEM |
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#include <floss.h(floss_execl,floss_execlp,floss_execv,floss_execvp)> |
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#include <floss.h(floss_getpwuid)> |
|
#ifndef NSIG |
|
/* |
|
* NonStop NSE and NSX do not provide NSIG. SIGGUARDIAN(99) is the highest |
|
* known, by detective work using kill -l as a list is all signals |
|
* instead of signal.h where it should be. |
|
*/ |
|
# define NSIG 100 |
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#endif |
|
#endif |
|
|
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#if defined(__HP_cc) && (__HP_cc >= 61000) |
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#define NORETURN __attribute__((noreturn)) |
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#define NORETURN_PTR |
|
#elif defined(__GNUC__) && !defined(NO_NORETURN) |
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#define NORETURN __attribute__((__noreturn__)) |
|
#define NORETURN_PTR __attribute__((__noreturn__)) |
|
#elif defined(_MSC_VER) |
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#define NORETURN __declspec(noreturn) |
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#define NORETURN_PTR |
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#else |
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#define NORETURN |
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#define NORETURN_PTR |
|
#ifndef __GNUC__ |
|
#ifndef __attribute__ |
|
#define __attribute__(x) |
|
#endif |
|
#endif |
|
#endif |
|
|
|
/* The sentinel attribute is valid from gcc version 4.0 */ |
|
#if defined(__GNUC__) && (__GNUC__ >= 4) |
|
#define LAST_ARG_MUST_BE_NULL __attribute__((sentinel)) |
|
#else |
|
#define LAST_ARG_MUST_BE_NULL |
|
#endif |
|
|
|
#define MAYBE_UNUSED __attribute__((__unused__)) |
|
|
|
#include "compat/bswap.h" |
|
|
|
#include "wildmatch.h" |
|
|
|
struct strbuf; |
|
|
|
/* General helper functions */ |
|
void vreportf(const char *prefix, const char *err, va_list params); |
|
NORETURN void usage(const char *err); |
|
NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))); |
|
NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2))); |
|
NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
|
int error(const char *err, ...) __attribute__((format (printf, 1, 2))); |
|
int error_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
|
void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); |
|
void warning_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
|
|
|
#ifndef NO_OPENSSL |
|
#ifdef APPLE_COMMON_CRYPTO |
|
#include "compat/apple-common-crypto.h" |
|
#else |
|
#include <openssl/evp.h> |
|
#include <openssl/hmac.h> |
|
#endif /* APPLE_COMMON_CRYPTO */ |
|
#include <openssl/x509v3.h> |
|
#endif /* NO_OPENSSL */ |
|
|
|
/* |
|
* Let callers be aware of the constant return value; this can help |
|
* gcc with -Wuninitialized analysis. We restrict this trick to gcc, though, |
|
* because some compilers may not support variadic macros. Since we're only |
|
* trying to help gcc, anyway, it's OK; other compilers will fall back to |
|
* using the function as usual. |
|
*/ |
|
#if defined(__GNUC__) |
|
static inline int const_error(void) |
|
{ |
|
return -1; |
|
} |
|
#define error(...) (error(__VA_ARGS__), const_error()) |
|
#define error_errno(...) (error_errno(__VA_ARGS__), const_error()) |
|
#endif |
|
|
|
typedef void (*report_fn)(const char *, va_list params); |
|
|
|
void set_die_routine(NORETURN_PTR report_fn routine); |
|
void set_error_routine(report_fn routine); |
|
report_fn get_error_routine(void); |
|
void set_warn_routine(report_fn routine); |
|
report_fn get_warn_routine(void); |
|
void set_die_is_recursing_routine(int (*routine)(void)); |
|
|
|
int starts_with(const char *str, const char *prefix); |
|
int istarts_with(const char *str, const char *prefix); |
|
|
|
/* |
|
* If the string "str" begins with the string found in "prefix", return 1. |
|
* The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in |
|
* the string right after the prefix). |
|
* |
|
* Otherwise, return 0 and leave "out" untouched. |
|
* |
|
* Examples: |
|
* |
|
* [extract branch name, fail if not a branch] |
|
* if (!skip_prefix(ref, "refs/heads/", &branch) |
|
* return -1; |
|
* |
|
* [skip prefix if present, otherwise use whole string] |
|
* skip_prefix(name, "refs/heads/", &name); |
|
*/ |
|
static inline int skip_prefix(const char *str, const char *prefix, |
|
const char **out) |
|
{ |
|
do { |
|
if (!*prefix) { |
|
*out = str; |
|
return 1; |
|
} |
|
} while (*str++ == *prefix++); |
|
return 0; |
|
} |
|
|
|
/* |
|
* If the string "str" is the same as the string in "prefix", then the "arg" |
|
* parameter is set to the "def" parameter and 1 is returned. |
|
* If the string "str" begins with the string found in "prefix" and then a |
|
* "=" sign, then the "arg" parameter is set to "str + strlen(prefix) + 1" |
|
* (i.e., to the point in the string right after the prefix and the "=" sign), |
|
* and 1 is returned. |
|
* |
|
* Otherwise, return 0 and leave "arg" untouched. |
|
* |
|
* When we accept both a "--key" and a "--key=<val>" option, this function |
|
* can be used instead of !strcmp(arg, "--key") and then |
|
* skip_prefix(arg, "--key=", &arg) to parse such an option. |
|
*/ |
|
int skip_to_optional_arg_default(const char *str, const char *prefix, |
|
const char **arg, const char *def); |
|
|
|
static inline int skip_to_optional_arg(const char *str, const char *prefix, |
|
const char **arg) |
|
{ |
|
return skip_to_optional_arg_default(str, prefix, arg, ""); |
|
} |
|
|
|
/* |
|
* Like skip_prefix, but promises never to read past "len" bytes of the input |
|
* buffer, and returns the remaining number of bytes in "out" via "outlen". |
|
*/ |
|
static inline int skip_prefix_mem(const char *buf, size_t len, |
|
const char *prefix, |
|
const char **out, size_t *outlen) |
|
{ |
|
size_t prefix_len = strlen(prefix); |
|
if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) { |
|
*out = buf + prefix_len; |
|
*outlen = len - prefix_len; |
|
return 1; |
|
} |
|
return 0; |
|
} |
|
|
|
/* |
|
* If buf ends with suffix, return 1 and subtract the length of the suffix |
|
* from *len. Otherwise, return 0 and leave *len untouched. |
|
*/ |
|
static inline int strip_suffix_mem(const char *buf, size_t *len, |
|
const char *suffix) |
|
{ |
|
size_t suflen = strlen(suffix); |
|
if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen)) |
|
return 0; |
|
*len -= suflen; |
|
return 1; |
|
} |
|
|
|
/* |
|
* If str ends with suffix, return 1 and set *len to the size of the string |
|
* without the suffix. Otherwise, return 0 and set *len to the size of the |
|
* string. |
|
* |
|
* Note that we do _not_ NUL-terminate str to the new length. |
|
*/ |
|
static inline int strip_suffix(const char *str, const char *suffix, size_t *len) |
|
{ |
|
*len = strlen(str); |
|
return strip_suffix_mem(str, len, suffix); |
|
} |
|
|
|
static inline int ends_with(const char *str, const char *suffix) |
|
{ |
|
size_t len; |
|
return strip_suffix(str, suffix, &len); |
|
} |
|
|
|
#define SWAP(a, b) do { \ |
|
void *_swap_a_ptr = &(a); \ |
|
void *_swap_b_ptr = &(b); \ |
|
unsigned char _swap_buffer[sizeof(a)]; \ |
|
memcpy(_swap_buffer, _swap_a_ptr, sizeof(a)); \ |
|
memcpy(_swap_a_ptr, _swap_b_ptr, sizeof(a) + \ |
|
BUILD_ASSERT_OR_ZERO(sizeof(a) == sizeof(b))); \ |
|
memcpy(_swap_b_ptr, _swap_buffer, sizeof(a)); \ |
|
} while (0) |
|
|
|
#if defined(NO_MMAP) || defined(USE_WIN32_MMAP) |
|
|
|
#ifndef PROT_READ |
|
#define PROT_READ 1 |
|
#define PROT_WRITE 2 |
|
#define MAP_PRIVATE 1 |
|
#endif |
|
|
|
#define mmap git_mmap |
|
#define munmap git_munmap |
|
void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); |
|
int git_munmap(void *start, size_t length); |
|
|
|
#else /* NO_MMAP || USE_WIN32_MMAP */ |
|
|
|
#include <sys/mman.h> |
|
|
|
#endif /* NO_MMAP || USE_WIN32_MMAP */ |
|
|
|
#ifdef NO_MMAP |
|
|
|
/* This value must be multiple of (pagesize * 2) */ |
|
#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) |
|
|
|
#else /* NO_MMAP */ |
|
|
|
/* This value must be multiple of (pagesize * 2) */ |
|
#define DEFAULT_PACKED_GIT_WINDOW_SIZE \ |
|
(sizeof(void*) >= 8 \ |
|
? 1 * 1024 * 1024 * 1024 \ |
|
: 32 * 1024 * 1024) |
|
|
|
#endif /* NO_MMAP */ |
|
|
|
#ifndef MAP_FAILED |
|
#define MAP_FAILED ((void *)-1) |
|
#endif |
|
|
|
#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT |
|
#define on_disk_bytes(st) ((st).st_size) |
|
#else |
|
#define on_disk_bytes(st) ((st).st_blocks * 512) |
|
#endif |
|
|
|
#ifdef NEEDS_MODE_TRANSLATION |
|
#undef S_IFMT |
|
#undef S_IFREG |
|
#undef S_IFDIR |
|
#undef S_IFLNK |
|
#undef S_IFBLK |
|
#undef S_IFCHR |
|
#undef S_IFIFO |
|
#undef S_IFSOCK |
|
#define S_IFMT 0170000 |
|
#define S_IFREG 0100000 |
|
#define S_IFDIR 0040000 |
|
#define S_IFLNK 0120000 |
|
#define S_IFBLK 0060000 |
|
#define S_IFCHR 0020000 |
|
#define S_IFIFO 0010000 |
|
#define S_IFSOCK 0140000 |
|
#ifdef stat |
|
#undef stat |
|
#endif |
|
#define stat(path, buf) git_stat(path, buf) |
|
int git_stat(const char *, struct stat *); |
|
#ifdef fstat |
|
#undef fstat |
|
#endif |
|
#define fstat(fd, buf) git_fstat(fd, buf) |
|
int git_fstat(int, struct stat *); |
|
#ifdef lstat |
|
#undef lstat |
|
#endif |
|
#define lstat(path, buf) git_lstat(path, buf) |
|
int git_lstat(const char *, struct stat *); |
|
#endif |
|
|
|
#define DEFAULT_PACKED_GIT_LIMIT \ |
|
((1024L * 1024L) * (size_t)(sizeof(void*) >= 8 ? (32 * 1024L * 1024L) : 256)) |
|
|
|
#ifdef NO_PREAD |
|
#define pread git_pread |
|
ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); |
|
#endif |
|
/* |
|
* Forward decl that will remind us if its twin in cache.h changes. |
|
* This function is used in compat/pread.c. But we can't include |
|
* cache.h there. |
|
*/ |
|
ssize_t read_in_full(int fd, void *buf, size_t count); |
|
|
|
#ifdef NO_SETENV |
|
#define setenv gitsetenv |
|
int gitsetenv(const char *, const char *, int); |
|
#endif |
|
|
|
#ifdef NO_MKDTEMP |
|
#define mkdtemp gitmkdtemp |
|
char *gitmkdtemp(char *); |
|
#endif |
|
|
|
#ifdef NO_UNSETENV |
|
#define unsetenv gitunsetenv |
|
void gitunsetenv(const char *); |
|
#endif |
|
|
|
#ifdef NO_STRCASESTR |
|
#define strcasestr gitstrcasestr |
|
char *gitstrcasestr(const char *haystack, const char *needle); |
|
#endif |
|
|
|
#ifdef NO_STRLCPY |
|
#define strlcpy gitstrlcpy |
|
size_t gitstrlcpy(char *, const char *, size_t); |
|
#endif |
|
|
|
#ifdef NO_STRTOUMAX |
|
#define strtoumax gitstrtoumax |
|
uintmax_t gitstrtoumax(const char *, char **, int); |
|
#define strtoimax gitstrtoimax |
|
intmax_t gitstrtoimax(const char *, char **, int); |
|
#endif |
|
|
|
#ifdef NO_HSTRERROR |
|
#define hstrerror githstrerror |
|
const char *githstrerror(int herror); |
|
#endif |
|
|
|
#ifdef NO_MEMMEM |
|
#define memmem gitmemmem |
|
void *gitmemmem(const void *haystack, size_t haystacklen, |
|
const void *needle, size_t needlelen); |
|
#endif |
|
|
|
#ifdef OVERRIDE_STRDUP |
|
#ifdef strdup |
|
#undef strdup |
|
#endif |
|
#define strdup gitstrdup |
|
char *gitstrdup(const char *s); |
|
#endif |
|
|
|
#ifdef NO_GETPAGESIZE |
|
#define getpagesize() sysconf(_SC_PAGESIZE) |
|
#endif |
|
|
|
#ifndef O_CLOEXEC |
|
#define O_CLOEXEC 0 |
|
#endif |
|
|
|
#ifdef FREAD_READS_DIRECTORIES |
|
# if !defined(SUPPRESS_FOPEN_REDEFINITION) |
|
# ifdef fopen |
|
# undef fopen |
|
# endif |
|
# define fopen(a,b) git_fopen(a,b) |
|
# endif |
|
FILE *git_fopen(const char*, const char*); |
|
#endif |
|
|
|
#ifdef SNPRINTF_RETURNS_BOGUS |
|
#ifdef snprintf |
|
#undef snprintf |
|
#endif |
|
#define snprintf git_snprintf |
|
int git_snprintf(char *str, size_t maxsize, |
|
const char *format, ...); |
|
#ifdef vsnprintf |
|
#undef vsnprintf |
|
#endif |
|
#define vsnprintf git_vsnprintf |
|
int git_vsnprintf(char *str, size_t maxsize, |
|
const char *format, va_list ap); |
|
#endif |
|
|
|
#ifdef OPEN_RETURNS_EINTR |
|
#undef open |
|
#define open git_open_with_retry |
|
int git_open_with_retry(const char *path, int flag, ...); |
|
#endif |
|
|
|
#ifdef __GLIBC_PREREQ |
|
#if __GLIBC_PREREQ(2, 1) |
|
#define HAVE_STRCHRNUL |
|
#endif |
|
#endif |
|
|
|
#ifndef HAVE_STRCHRNUL |
|
#define strchrnul gitstrchrnul |
|
static inline char *gitstrchrnul(const char *s, int c) |
|
{ |
|
while (*s && *s != c) |
|
s++; |
|
return (char *)s; |
|
} |
|
#endif |
|
|
|
#ifdef NO_INET_PTON |
|
int inet_pton(int af, const char *src, void *dst); |
|
#endif |
|
|
|
#ifdef NO_INET_NTOP |
|
const char *inet_ntop(int af, const void *src, char *dst, size_t size); |
|
#endif |
|
|
|
#ifdef NO_PTHREADS |
|
#define atexit git_atexit |
|
int git_atexit(void (*handler)(void)); |
|
#endif |
|
|
|
static inline size_t st_add(size_t a, size_t b) |
|
{ |
|
if (unsigned_add_overflows(a, b)) |
|
die("size_t overflow: %"PRIuMAX" + %"PRIuMAX, |
|
(uintmax_t)a, (uintmax_t)b); |
|
return a + b; |
|
} |
|
#define st_add3(a,b,c) st_add(st_add((a),(b)),(c)) |
|
#define st_add4(a,b,c,d) st_add(st_add3((a),(b),(c)),(d)) |
|
|
|
static inline size_t st_mult(size_t a, size_t b) |
|
{ |
|
if (unsigned_mult_overflows(a, b)) |
|
die("size_t overflow: %"PRIuMAX" * %"PRIuMAX, |
|
(uintmax_t)a, (uintmax_t)b); |
|
return a * b; |
|
} |
|
|
|
static inline size_t st_sub(size_t a, size_t b) |
|
{ |
|
if (a < b) |
|
die("size_t underflow: %"PRIuMAX" - %"PRIuMAX, |
|
(uintmax_t)a, (uintmax_t)b); |
|
return a - b; |
|
} |
|
|
|
static inline int cast_size_t_to_int(size_t a) |
|
{ |
|
if (a > INT_MAX) |
|
die("number too large to represent as int on this platform: %"PRIuMAX, |
|
(uintmax_t)a); |
|
return (int)a; |
|
} |
|
|
|
#ifdef HAVE_ALLOCA_H |
|
# include <alloca.h> |
|
# define xalloca(size) (alloca(size)) |
|
# define xalloca_free(p) do {} while (0) |
|
#else |
|
# define xalloca(size) (xmalloc(size)) |
|
# define xalloca_free(p) (free(p)) |
|
#endif |
|
char *xstrdup(const char *str); |
|
void *xmalloc(size_t size); |
|
void *xmallocz(size_t size); |
|
void *xmallocz_gently(size_t size); |
|
void *xmemdupz(const void *data, size_t len); |
|
char *xstrndup(const char *str, size_t len); |
|
void *xrealloc(void *ptr, size_t size); |
|
void *xcalloc(size_t nmemb, size_t size); |
|
void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); |
|
void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset); |
|
int xopen(const char *path, int flags, ...); |
|
ssize_t xread(int fd, void *buf, size_t len); |
|
ssize_t xwrite(int fd, const void *buf, size_t len); |
|
ssize_t xpread(int fd, void *buf, size_t len, off_t offset); |
|
int xdup(int fd); |
|
FILE *xfopen(const char *path, const char *mode); |
|
FILE *xfdopen(int fd, const char *mode); |
|
int xmkstemp(char *temp_filename); |
|
int xmkstemp_mode(char *temp_filename, int mode); |
|
char *xgetcwd(void); |
|
FILE *fopen_for_writing(const char *path); |
|
FILE *fopen_or_warn(const char *path, const char *mode); |
|
|
|
/* |
|
* Like strncmp, but only return zero if s is NUL-terminated and exactly len |
|
* characters long. If it is not, consider it greater than t. |
|
*/ |
|
int xstrncmpz(const char *s, const char *t, size_t len); |
|
|
|
/* |
|
* FREE_AND_NULL(ptr) is like free(ptr) followed by ptr = NULL. Note |
|
* that ptr is used twice, so don't pass e.g. ptr++. |
|
*/ |
|
#define FREE_AND_NULL(p) do { free(p); (p) = NULL; } while (0) |
|
|
|
#define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc))) |
|
#define CALLOC_ARRAY(x, alloc) (x) = xcalloc((alloc), sizeof(*(x))) |
|
#define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc))) |
|
|
|
#define COPY_ARRAY(dst, src, n) copy_array((dst), (src), (n), sizeof(*(dst)) + \ |
|
BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) |
|
static inline void copy_array(void *dst, const void *src, size_t n, size_t size) |
|
{ |
|
if (n) |
|
memcpy(dst, src, st_mult(size, n)); |
|
} |
|
|
|
#define MOVE_ARRAY(dst, src, n) move_array((dst), (src), (n), sizeof(*(dst)) + \ |
|
BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) |
|
static inline void move_array(void *dst, const void *src, size_t n, size_t size) |
|
{ |
|
if (n) |
|
memmove(dst, src, st_mult(size, n)); |
|
} |
|
|
|
/* |
|
* These functions help you allocate structs with flex arrays, and copy |
|
* the data directly into the array. For example, if you had: |
|
* |
|
* struct foo { |
|
* int bar; |
|
* char name[FLEX_ARRAY]; |
|
* }; |
|
* |
|
* you can do: |
|
* |
|
* struct foo *f; |
|
* FLEX_ALLOC_MEM(f, name, src, len); |
|
* |
|
* to allocate a "foo" with the contents of "src" in the "name" field. |
|
* The resulting struct is automatically zero'd, and the flex-array field |
|
* is NUL-terminated (whether the incoming src buffer was or not). |
|
* |
|
* The FLEXPTR_* variants operate on structs that don't use flex-arrays, |
|
* but do want to store a pointer to some extra data in the same allocated |
|
* block. For example, if you have: |
|
* |
|
* struct foo { |
|
* char *name; |
|
* int bar; |
|
* }; |
|
* |
|
* you can do: |
|
* |
|
* struct foo *f; |
|
* FLEXPTR_ALLOC_STR(f, name, src); |
|
* |
|
* and "name" will point to a block of memory after the struct, which will be |
|
* freed along with the struct (but the pointer can be repointed anywhere). |
|
* |
|
* The *_STR variants accept a string parameter rather than a ptr/len |
|
* combination. |
|
* |
|
* Note that these macros will evaluate the first parameter multiple |
|
* times, and it must be assignable as an lvalue. |
|
*/ |
|
#define FLEX_ALLOC_MEM(x, flexname, buf, len) do { \ |
|
size_t flex_array_len_ = (len); \ |
|
(x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ |
|
memcpy((void *)(x)->flexname, (buf), flex_array_len_); \ |
|
} while (0) |
|
#define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) do { \ |
|
size_t flex_array_len_ = (len); \ |
|
(x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ |
|
memcpy((x) + 1, (buf), flex_array_len_); \ |
|
(x)->ptrname = (void *)((x)+1); \ |
|
} while(0) |
|
#define FLEX_ALLOC_STR(x, flexname, str) \ |
|
FLEX_ALLOC_MEM((x), flexname, (str), strlen(str)) |
|
#define FLEXPTR_ALLOC_STR(x, ptrname, str) \ |
|
FLEXPTR_ALLOC_MEM((x), ptrname, (str), strlen(str)) |
|
|
|
static inline char *xstrdup_or_null(const char *str) |
|
{ |
|
return str ? xstrdup(str) : NULL; |
|
} |
|
|
|
static inline size_t xsize_t(off_t len) |
|
{ |
|
size_t size = (size_t) len; |
|
|
|
if (len != (off_t) size) |
|
die("Cannot handle files this big"); |
|
return size; |
|
} |
|
|
|
__attribute__((format (printf, 3, 4))) |
|
int xsnprintf(char *dst, size_t max, const char *fmt, ...); |
|
|
|
#ifndef HOST_NAME_MAX |
|
#define HOST_NAME_MAX 256 |
|
#endif |
|
|
|
int xgethostname(char *buf, size_t len); |
|
|
|
/* in ctype.c, for kwset users */ |
|
extern const unsigned char tolower_trans_tbl[256]; |
|
|
|
/* Sane ctype - no locale, and works with signed chars */ |
|
#undef isascii |
|
#undef isspace |
|
#undef isdigit |
|
#undef isalpha |
|
#undef isalnum |
|
#undef isprint |
|
#undef islower |
|
#undef isupper |
|
#undef tolower |
|
#undef toupper |
|
#undef iscntrl |
|
#undef ispunct |
|
#undef isxdigit |
|
|
|
extern const unsigned char sane_ctype[256]; |
|
#define GIT_SPACE 0x01 |
|
#define GIT_DIGIT 0x02 |
|
#define GIT_ALPHA 0x04 |
|
#define GIT_GLOB_SPECIAL 0x08 |
|
#define GIT_REGEX_SPECIAL 0x10 |
|
#define GIT_PATHSPEC_MAGIC 0x20 |
|
#define GIT_CNTRL 0x40 |
|
#define GIT_PUNCT 0x80 |
|
#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) |
|
#define isascii(x) (((x) & ~0x7f) == 0) |
|
#define isspace(x) sane_istest(x,GIT_SPACE) |
|
#define isdigit(x) sane_istest(x,GIT_DIGIT) |
|
#define isalpha(x) sane_istest(x,GIT_ALPHA) |
|
#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) |
|
#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e) |
|
#define islower(x) sane_iscase(x, 1) |
|
#define isupper(x) sane_iscase(x, 0) |
|
#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL) |
|
#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL) |
|
#define iscntrl(x) (sane_istest(x,GIT_CNTRL)) |
|
#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \ |
|
GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC) |
|
#define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1) |
|
#define tolower(x) sane_case((unsigned char)(x), 0x20) |
|
#define toupper(x) sane_case((unsigned char)(x), 0) |
|
#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC) |
|
|
|
static inline int sane_case(int x, int high) |
|
{ |
|
if (sane_istest(x, GIT_ALPHA)) |
|
x = (x & ~0x20) | high; |
|
return x; |
|
} |
|
|
|
static inline int sane_iscase(int x, int is_lower) |
|
{ |
|
if (!sane_istest(x, GIT_ALPHA)) |
|
return 0; |
|
|
|
if (is_lower) |
|
return (x & 0x20) != 0; |
|
else |
|
return (x & 0x20) == 0; |
|
} |
|
|
|
/* |
|
* Like skip_prefix, but compare case-insensitively. Note that the comparison |
|
* is done via tolower(), so it is strictly ASCII (no multi-byte characters or |
|
* locale-specific conversions). |
|
*/ |
|
static inline int skip_iprefix(const char *str, const char *prefix, |
|
const char **out) |
|
{ |
|
do { |
|
if (!*prefix) { |
|
*out = str; |
|
return 1; |
|
} |
|
} while (tolower(*str++) == tolower(*prefix++)); |
|
return 0; |
|
} |
|
|
|
static inline int strtoul_ui(char const *s, int base, unsigned int *result) |
|
{ |
|
unsigned long ul; |
|
char *p; |
|
|
|
errno = 0; |
|
/* negative values would be accepted by strtoul */ |
|
if (strchr(s, '-')) |
|
return -1; |
|
ul = strtoul(s, &p, base); |
|
if (errno || *p || p == s || (unsigned int) ul != ul) |
|
return -1; |
|
*result = ul; |
|
return 0; |
|
} |
|
|
|
static inline int strtol_i(char const *s, int base, int *result) |
|
{ |
|
long ul; |
|
char *p; |
|
|
|
errno = 0; |
|
ul = strtol(s, &p, base); |
|
if (errno || *p || p == s || (int) ul != ul) |
|
return -1; |
|
*result = ul; |
|
return 0; |
|
} |
|
|
|
void git_stable_qsort(void *base, size_t nmemb, size_t size, |
|
int(*compar)(const void *, const void *)); |
|
#ifdef INTERNAL_QSORT |
|
#define qsort git_stable_qsort |
|
#endif |
|
|
|
#define QSORT(base, n, compar) sane_qsort((base), (n), sizeof(*(base)), compar) |
|
static inline void sane_qsort(void *base, size_t nmemb, size_t size, |
|
int(*compar)(const void *, const void *)) |
|
{ |
|
if (nmemb > 1) |
|
qsort(base, nmemb, size, compar); |
|
} |
|
|
|
#define STABLE_QSORT(base, n, compar) \ |
|
git_stable_qsort((base), (n), sizeof(*(base)), compar) |
|
|
|
#ifndef HAVE_ISO_QSORT_S |
|
int git_qsort_s(void *base, size_t nmemb, size_t size, |
|
int (*compar)(const void *, const void *, void *), void *ctx); |
|
#define qsort_s git_qsort_s |
|
#endif |
|
|
|
#define QSORT_S(base, n, compar, ctx) do { \ |
|
if (qsort_s((base), (n), sizeof(*(base)), compar, ctx)) \ |
|
BUG("qsort_s() failed"); \ |
|
} while (0) |
|
|
|
#ifndef REG_STARTEND |
|
#error "Git requires REG_STARTEND support. Compile with NO_REGEX=NeedsStartEnd" |
|
#endif |
|
|
|
static inline int regexec_buf(const regex_t *preg, const char *buf, size_t size, |
|
size_t nmatch, regmatch_t pmatch[], int eflags) |
|
{ |
|
assert(nmatch > 0 && pmatch); |
|
pmatch[0].rm_so = 0; |
|
pmatch[0].rm_eo = size; |
|
return regexec(preg, buf, nmatch, pmatch, eflags | REG_STARTEND); |
|
} |
|
|
|
#ifndef DIR_HAS_BSD_GROUP_SEMANTICS |
|
# define FORCE_DIR_SET_GID S_ISGID |
|
#else |
|
# define FORCE_DIR_SET_GID 0 |
|
#endif |
|
|
|
#ifdef NO_NSEC |
|
#undef USE_NSEC |
|
#define ST_CTIME_NSEC(st) 0 |
|
#define ST_MTIME_NSEC(st) 0 |
|
#else |
|
#ifdef USE_ST_TIMESPEC |
|
#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec)) |
|
#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec)) |
|
#else |
|
#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec)) |
|
#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec)) |
|
#endif |
|
#endif |
|
|
|
#ifdef UNRELIABLE_FSTAT |
|
#define fstat_is_reliable() 0 |
|
#else |
|
#define fstat_is_reliable() 1 |
|
#endif |
|
|
|
#ifndef va_copy |
|
/* |
|
* Since an obvious implementation of va_list would be to make it a |
|
* pointer into the stack frame, a simple assignment will work on |
|
* many systems. But let's try to be more portable. |
|
*/ |
|
#ifdef __va_copy |
|
#define va_copy(dst, src) __va_copy(dst, src) |
|
#else |
|
#define va_copy(dst, src) ((dst) = (src)) |
|
#endif |
|
#endif |
|
|
|
/* |
|
* This is always defined as a first step towards making the use of variadic |
|
* macros unconditional. If it causes compilation problems on your platform, |
|
* please report it to the Git mailing list at git@vger.kernel.org. |
|
*/ |
|
#define HAVE_VARIADIC_MACROS 1 |
|
|
|
/* usage.c: only to be used for testing BUG() implementation (see test-tool) */ |
|
extern int BUG_exit_code; |
|
|
|
#ifdef HAVE_VARIADIC_MACROS |
|
__attribute__((format (printf, 3, 4))) NORETURN |
|
void BUG_fl(const char *file, int line, const char *fmt, ...); |
|
#define BUG(...) BUG_fl(__FILE__, __LINE__, __VA_ARGS__) |
|
#else |
|
__attribute__((format (printf, 1, 2))) NORETURN |
|
void BUG(const char *fmt, ...); |
|
#endif |
|
|
|
/* |
|
* Preserves errno, prints a message, but gives no warning for ENOENT. |
|
* Returns 0 on success, which includes trying to unlink an object that does |
|
* not exist. |
|
*/ |
|
int unlink_or_warn(const char *path); |
|
/* |
|
* Tries to unlink file. Returns 0 if unlink succeeded |
|
* or the file already didn't exist. Returns -1 and |
|
* appends a message to err suitable for |
|
* 'error("%s", err->buf)' on error. |
|
*/ |
|
int unlink_or_msg(const char *file, struct strbuf *err); |
|
/* |
|
* Preserves errno, prints a message, but gives no warning for ENOENT. |
|
* Returns 0 on success, which includes trying to remove a directory that does |
|
* not exist. |
|
*/ |
|
int rmdir_or_warn(const char *path); |
|
/* |
|
* Calls the correct function out of {unlink,rmdir}_or_warn based on |
|
* the supplied file mode. |
|
*/ |
|
int remove_or_warn(unsigned int mode, const char *path); |
|
|
|
/* |
|
* Call access(2), but warn for any error except "missing file" |
|
* (ENOENT or ENOTDIR). |
|
*/ |
|
#define ACCESS_EACCES_OK (1U << 0) |
|
int access_or_warn(const char *path, int mode, unsigned flag); |
|
int access_or_die(const char *path, int mode, unsigned flag); |
|
|
|
/* Warn on an inaccessible file if errno indicates this is an error */ |
|
int warn_on_fopen_errors(const char *path); |
|
|
|
/* |
|
* Open with O_NOFOLLOW, or equivalent. Note that the fallback equivalent |
|
* may be racy. Do not use this as protection against an attacker who can |
|
* simultaneously create paths. |
|
*/ |
|
int open_nofollow(const char *path, int flags); |
|
|
|
#if !defined(USE_PARENS_AROUND_GETTEXT_N) && defined(__GNUC__) |
|
#define USE_PARENS_AROUND_GETTEXT_N 1 |
|
#endif |
|
|
|
#ifndef SHELL_PATH |
|
# define SHELL_PATH "/bin/sh" |
|
#endif |
|
|
|
#ifndef _POSIX_THREAD_SAFE_FUNCTIONS |
|
static inline void flockfile(FILE *fh) |
|
{ |
|
; /* nothing */ |
|
} |
|
static inline void funlockfile(FILE *fh) |
|
{ |
|
; /* nothing */ |
|
} |
|
#define getc_unlocked(fh) getc(fh) |
|
#endif |
|
|
|
#ifdef FILENO_IS_A_MACRO |
|
int git_fileno(FILE *stream); |
|
# ifndef COMPAT_CODE_FILENO |
|
# undef fileno |
|
# define fileno(p) git_fileno(p) |
|
# endif |
|
#endif |
|
|
|
#ifdef NEED_ACCESS_ROOT_HANDLER |
|
int git_access(const char *path, int mode); |
|
# ifndef COMPAT_CODE_ACCESS |
|
# ifdef access |
|
# undef access |
|
# endif |
|
# define access(path, mode) git_access(path, mode) |
|
# endif |
|
#endif |
|
|
|
/* |
|
* Our code often opens a path to an optional file, to work on its |
|
* contents when we can successfully open it. We can ignore a failure |
|
* to open if such an optional file does not exist, but we do want to |
|
* report a failure in opening for other reasons (e.g. we got an I/O |
|
* error, or the file is there, but we lack the permission to open). |
|
* |
|
* Call this function after seeing an error from open() or fopen() to |
|
* see if the errno indicates a missing file that we can safely ignore. |
|
*/ |
|
static inline int is_missing_file_error(int errno_) |
|
{ |
|
return (errno_ == ENOENT || errno_ == ENOTDIR); |
|
} |
|
|
|
int cmd_main(int, const char **); |
|
|
|
/* |
|
* Intercept all calls to exit() and route them to trace2 to |
|
* optionally emit a message before calling the real exit(). |
|
*/ |
|
int trace2_cmd_exit_fl(const char *file, int line, int code); |
|
#define exit(code) exit(trace2_cmd_exit_fl(__FILE__, __LINE__, (code))) |
|
|
|
/* |
|
* You can mark a stack variable with UNLEAK(var) to avoid it being |
|
* reported as a leak by tools like LSAN or valgrind. The argument |
|
* should generally be the variable itself (not its address and not what |
|
* it points to). It's safe to use this on pointers which may already |
|
* have been freed, or on pointers which may still be in use. |
|
* |
|
* Use this _only_ for a variable that leaks by going out of scope at |
|
* program exit (so only from cmd_* functions or their direct helpers). |
|
* Normal functions, especially those which may be called multiple |
|
* times, should actually free their memory. This is only meant as |
|
* an annotation, and does nothing in non-leak-checking builds. |
|
*/ |
|
#ifdef SUPPRESS_ANNOTATED_LEAKS |
|
void unleak_memory(const void *ptr, size_t len); |
|
#define UNLEAK(var) unleak_memory(&(var), sizeof(var)) |
|
#else |
|
#define UNLEAK(var) do {} while (0) |
|
#endif |
|
|
|
/* |
|
* This include must come after system headers, since it introduces macros that |
|
* replace system names. |
|
*/ |
|
#include "banned.h" |
|
|
|
/* |
|
* container_of - Get the address of an object containing a field. |
|
* |
|
* @ptr: pointer to the field. |
|
* @type: type of the object. |
|
* @member: name of the field within the object. |
|
*/ |
|
#define container_of(ptr, type, member) \ |
|
((type *) ((char *)(ptr) - offsetof(type, member))) |
|
|
|
/* |
|
* helper function for `container_of_or_null' to avoid multiple |
|
* evaluation of @ptr |
|
*/ |
|
static inline void *container_of_or_null_offset(void *ptr, size_t offset) |
|
{ |
|
return ptr ? (char *)ptr - offset : NULL; |
|
} |
|
|
|
/* |
|
* like `container_of', but allows returned value to be NULL |
|
*/ |
|
#define container_of_or_null(ptr, type, member) \ |
|
(type *)container_of_or_null_offset(ptr, offsetof(type, member)) |
|
|
|
/* |
|
* like offsetof(), but takes a pointer to a a variable of type which |
|
* contains @member, instead of a specified type. |
|
* @ptr is subject to multiple evaluation since we can't rely on __typeof__ |
|
* everywhere. |
|
*/ |
|
#if defined(__GNUC__) /* clang sets this, too */ |
|
#define OFFSETOF_VAR(ptr, member) offsetof(__typeof__(*ptr), member) |
|
#else /* !__GNUC__ */ |
|
#define OFFSETOF_VAR(ptr, member) \ |
|
((uintptr_t)&(ptr)->member - (uintptr_t)(ptr)) |
|
#endif /* !__GNUC__ */ |
|
|
|
void sleep_millisec(int millisec); |
|
|
|
#endif
|
|
|