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base/SOURCES/bash-2.05a-interpreter.patch

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diff -up bash-4.2-rc2/config.h.in.interpreter bash-4.2-rc2/config.h.in
--- bash-4.2-rc2/config.h.in.interpreter 2011-02-09 07:59:21.000000000 +0100
+++ bash-4.2-rc2/config.h.in 2011-02-09 07:59:21.000000000 +0100
@@ -706,6 +706,9 @@
/* Define if you have the pathconf function. */
#undef HAVE_PATHCONF
+/* Define if you have the pread function. */
+#undef HAVE_PREAD
+
/* Define if you have the putenv function. */
#undef HAVE_PUTENV
@@ -898,6 +901,9 @@
/* Define if you have the <dlfcn.h> header file. */
#undef HAVE_DLFCN_H
+/* Define if you have the <elf.h> header file. */
+#undef HAVE_ELF_H
+
/* Define if you have the <grp.h> header file. */
#undef HAVE_GRP_H
diff -up bash-4.2-rc2/configure.in.interpreter bash-4.2-rc2/configure.in
--- bash-4.2-rc2/configure.in.interpreter 2011-01-16 21:31:12.000000000 +0100
+++ bash-4.2-rc2/configure.in 2011-02-09 08:02:27.000000000 +0100
@@ -659,7 +659,7 @@ BASH_HEADER_INTTYPES
AC_CHECK_HEADERS(unistd.h stdlib.h stdarg.h varargs.h limits.h string.h \
memory.h locale.h termcap.h termio.h termios.h dlfcn.h \
stddef.h stdint.h netdb.h pwd.h grp.h strings.h regex.h \
- syslog.h ulimit.h)
+ syslog.h ulimit.h elf.h)
AC_CHECK_HEADERS(sys/pte.h sys/stream.h sys/select.h sys/file.h \
sys/resource.h sys/param.h sys/socket.h sys/stat.h \
sys/time.h sys/times.h sys/types.h sys/wait.h)
@@ -723,7 +723,7 @@ dnl checks for system calls
AC_CHECK_FUNCS(dup2 eaccess fcntl getdtablesize getgroups gethostname \
getpagesize getpeername getrlimit getrusage gettimeofday \
kill killpg lstat readlink sbrk select setdtablesize \
- setitimer tcgetpgrp uname ulimit waitpid)
+ setitimer tcgetpgrp uname ulimit waitpid pread)
AC_REPLACE_FUNCS(rename)
dnl checks for c library functions
diff -up bash-4.2-rc2/execute_cmd.c.interpreter bash-4.2-rc2/execute_cmd.c
--- bash-4.2-rc2/execute_cmd.c.interpreter 2011-01-20 04:24:47.000000000 +0100
+++ bash-4.2-rc2/execute_cmd.c 2011-02-09 07:59:21.000000000 +0100
@@ -41,6 +41,10 @@
# include <unistd.h>
#endif
+#ifdef HAVE_ELF_H
+# include <elf.h>
+#endif
+
#include "posixtime.h"
#if defined (HAVE_SYS_RESOURCE_H) && !defined (RLIMTYPE)
@@ -4975,13 +4979,21 @@ shell_execve (command, args, env)
{
/* The file has the execute bits set, but the kernel refuses to
run it for some reason. See why. */
+#if defined (HAVE_HASH_BANG_EXEC) || defined (HAVE_ELF_H)
+ int fd = open (command, O_RDONLY);
+
+ if (fd >= 0)
+ sample_len = read (fd, sample, sizeof (sample));
+ else
+ sample_len = -1;
+#endif
#if defined (HAVE_HASH_BANG_EXEC)
- READ_SAMPLE_BUF (command, sample, sample_len);
if (sample_len > 2 && sample[0] == '#' && sample[1] == '!')
{
char *interp;
int ilen;
+ close (fd);
interp = getinterp (sample, sample_len, (int *)NULL);
ilen = strlen (interp);
errno = i;
@@ -4997,6 +5009,136 @@ shell_execve (command, args, env)
return (EX_NOEXEC);
}
#endif
+#if defined (HAVE_ELF_H)
+ if (i == ENOENT
+ && sample_len > EI_NIDENT
+ && memcmp (sample, ELFMAG, SELFMAG) == 0)
+ {
+ off_t offset = -1;
+
+ /* It is an ELF file. Now determine whether it is dynamically
+ linked and if yes, get the offset of the interpreter
+ string. */
+ if (sample[EI_CLASS] == ELFCLASS32
+ && sample_len > sizeof (Elf32_Ehdr))
+ {
+ Elf32_Ehdr ehdr;
+ Elf32_Phdr *phdr;
+ int nphdr;
+
+ /* We have to copy the data since the sample buffer
+ might not be aligned correctly to be accessed as
+ an Elf32_Ehdr struct. */
+ memcpy (&ehdr, sample, sizeof (Elf32_Ehdr));
+
+ nphdr = ehdr.e_phnum;
+ phdr = (Elf32_Phdr *) malloc (nphdr * ehdr.e_phentsize);
+ if (phdr != NULL)
+ {
+#ifdef HAVE_PREAD
+ sample_len = pread (fd, phdr, nphdr * ehdr.e_phentsize,
+ ehdr.e_phoff);
+#else
+ if (lseek (fd, ehdr.e_phoff, SEEK_SET) != -1)
+ sample_len = read (fd, phdr,
+ nphdr * ehdr.e_phentsize);
+ else
+ sample_len = -1;
+#endif
+ if (sample_len == nphdr * ehdr.e_phentsize)
+ while (nphdr-- > 0)
+ if (phdr[nphdr].p_type == PT_INTERP)
+ {
+ offset = phdr[nphdr].p_offset;
+ break;
+ }
+ free (phdr);
+ }
+ }
+ else if (sample[EI_CLASS] == ELFCLASS64
+ && sample_len > sizeof (Elf64_Ehdr))
+ {
+ Elf64_Ehdr ehdr;
+ Elf64_Phdr *phdr;
+ int nphdr;
+
+ /* We have to copy the data since the sample buffer
+ might not be aligned correctly to be accessed as
+ an Elf64_Ehdr struct. */
+ memcpy (&ehdr, sample, sizeof (Elf64_Ehdr));
+
+ nphdr = ehdr.e_phnum;
+ phdr = (Elf64_Phdr *) malloc (nphdr * ehdr.e_phentsize);
+ if (phdr != NULL)
+ {
+#ifdef HAVE_PREAD
+ sample_len = pread (fd, phdr, nphdr * ehdr.e_phentsize,
+ ehdr.e_phoff);
+#else
+ if (lseek (fd, ehdr.e_phoff, SEEK_SET) != -1)
+ sample_len = read (fd, phdr,
+ nphdr * ehdr.e_phentsize);
+ else
+ sample_len = -1;
+#endif
+ if (sample_len == nphdr * ehdr.e_phentsize)
+ while (nphdr-- > 0)
+ if (phdr[nphdr].p_type == PT_INTERP)
+ {
+ offset = phdr[nphdr].p_offset;
+ break;
+ }
+ free (phdr);
+ }
+ }
+
+ if (offset != -1)
+ {
+ size_t maxlen = 0;
+ size_t actlen = 0;
+ char *interp = NULL;
+
+ do
+ {
+ if (actlen == maxlen)
+ {
+ char *newinterp = realloc (interp, maxlen += 200);
+ if (newinterp == NULL)
+ {
+ actlen = 0;
+ break;
+ }
+ interp = newinterp;
+
+#ifdef HAVE_PREAD
+ actlen = pread (fd, interp, maxlen, offset);
+#else
+ if (lseek (fd, offset, SEEK_SET) != -1)
+ actlen = read (fd, interp, maxlen);
+ else
+ actlen = -1;
+#endif
+ }
+ }
+ while (actlen > 0 && memchr (interp, '\0', actlen) == NULL);
+
+ if (actlen > 0)
+ {
+ close (fd);
+ errno = i;
+ sys_error ("%s: %s: bad ELF interpreter", command,
+ interp);
+ free (interp);
+ return (EX_NOEXEC);
+ }
+
+ free (interp);
+ }
+ }
+#endif
+#if defined (HAVE_HASH_BANG_EXEC) || defined (HAVE_ELF_H)
+ close (fd);
+#endif
errno = i;
file_error (command);
}