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Make xbps_file_chdir_exec() change root directory if /bin/sh exists.

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If /bin/sh is not there, fall back to chdir(destdir) as before.

--HG--
extra : convert_revision : 7506a8db97346dbf45292e4c46b9d8ecc384162a
This commit is contained in:
Juan RP 2009-04-07 22:54:34 +02:00
parent 581e908793
commit 3e9e342f74
1 changed files with 18 additions and 5 deletions
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23
lib/fexec.c
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@ -41,8 +41,9 @@ static int vfcexec(const char *, int, const char *, va_list);
static int pfcexec(const char *, const char *, const char **);
/*
* fork, then change current working directory to path and
* execute the command and arguments in the argv array.
* Fork, then if /bin/sh exists change root directory to
* path; otherwise just change current working directory.
* Execute the command and arguments in the argv array.
* wait for the command to finish, then return the exit status.
*/
static int
@ -54,9 +55,21 @@ pfcexec(const char *path, const char *file, const char **argv)
child = vfork();
switch (child) {
case 0:
if ((path != NULL) && (chdir(path) < 0))
_exit(127);
if (path != NULL) {
/*
* If /bin/sh exists, chroot to destdir.
* Otherwise chdir to destdir.
*/
if (access("./bin/sh", R_OK) == 0) {
if (chroot(path) == -1)
_exit(127);
if (chdir("/") == -1)
_exit(127);
} else {
if (chdir(path) == -1)
_exit(127);
}
}
(void)execvp(file, (char ** const)argv);
_exit(127);
/* NOTREACHED */