143 lines
4.8 KiB
C
143 lines
4.8 KiB
C
#ifndef WRAPPER_H
|
|
#define WRAPPER_H
|
|
|
|
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 xsetenv(const char *name, const char *value, int overwrite);
|
|
void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
|
|
const char *mmap_os_err(void);
|
|
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);
|
|
|
|
__attribute__((format (printf, 3, 4)))
|
|
int xsnprintf(char *dst, size_t max, const char *fmt, ...);
|
|
|
|
int xgethostname(char *buf, size_t len);
|
|
|
|
/* set default permissions by passing mode arguments to open(2) */
|
|
int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
|
|
int git_mkstemp_mode(char *pattern, int mode);
|
|
|
|
ssize_t read_in_full(int fd, void *buf, size_t count);
|
|
ssize_t write_in_full(int fd, const void *buf, size_t count);
|
|
ssize_t pread_in_full(int fd, void *buf, size_t count, off_t offset);
|
|
|
|
static inline ssize_t write_str_in_full(int fd, const char *str)
|
|
{
|
|
return write_in_full(fd, str, strlen(str));
|
|
}
|
|
|
|
/**
|
|
* Open (and truncate) the file at path, write the contents of buf to it,
|
|
* and close it. Dies if any errors are encountered.
|
|
*/
|
|
void write_file_buf(const char *path, const char *buf, size_t len);
|
|
|
|
/**
|
|
* Like write_file_buf(), but format the contents into a buffer first.
|
|
* Additionally, write_file() will append a newline if one is not already
|
|
* present, making it convenient to write text files:
|
|
*
|
|
* write_file(path, "counter: %d", ctr);
|
|
*/
|
|
__attribute__((format (printf, 2, 3)))
|
|
void write_file(const char *path, const char *fmt, ...);
|
|
|
|
/* Return 1 if the file is empty or does not exists, 0 otherwise. */
|
|
int is_empty_or_missing_file(const char *filename);
|
|
|
|
enum fsync_action {
|
|
FSYNC_WRITEOUT_ONLY,
|
|
FSYNC_HARDWARE_FLUSH
|
|
};
|
|
|
|
/*
|
|
* Issues an fsync against the specified file according to the specified mode.
|
|
*
|
|
* FSYNC_WRITEOUT_ONLY attempts to use interfaces available on some operating
|
|
* systems to flush the OS cache without issuing a flush command to the storage
|
|
* controller. If those interfaces are unavailable, the function fails with
|
|
* ENOSYS.
|
|
*
|
|
* FSYNC_HARDWARE_FLUSH does an OS writeout and hardware flush to ensure that
|
|
* changes are durable. It is not expected to fail.
|
|
*/
|
|
int git_fsync(int fd, enum fsync_action action);
|
|
|
|
/*
|
|
* 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);
|
|
|
|
void sleep_millisec(int millisec);
|
|
|
|
/*
|
|
* Generate len bytes from the system cryptographically secure PRNG.
|
|
* Returns 0 on success and -1 on error, setting errno. The inability to
|
|
* satisfy the full request is an error.
|
|
*/
|
|
int csprng_bytes(void *buf, size_t len);
|
|
|
|
#endif /* WRAPPER_H */
|