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alpm: test access of symlinks not where they point

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On platforms that have AT_SYMLINK_NOFOLLOW

Fixes FS#69720
This commit is contained in:
morganamilo 2021-10-01 21:13:18 +01:00 • committed by Allan McRae
parent 015cdb21bd
commit b4f11d5496
1 changed files with 8 additions and 2 deletions
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10
lib/libalpm/util.c
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@ -31,6 +31,7 @@
#include <limits.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <poll.h>
#include <signal.h>
@ -1352,6 +1353,11 @@ int _alpm_access(alpm_handle_t *handle, const char *dir, const char *file, int a
size_t len = 0;
int ret = 0;
int flag = 0;
#ifdef AT_SYMLINK_NOFOLLOW
flag |= AT_SYMLINK_NOFOLLOW;
#endif
if(dir) {
char *check_path;
@ -1359,11 +1365,11 @@ int _alpm_access(alpm_handle_t *handle, const char *dir, const char *file, int a
CALLOC(check_path, len, sizeof(char), RET_ERR(handle, ALPM_ERR_MEMORY, -1));
snprintf(check_path, len, "%s%s", dir, file);
ret = access(check_path, amode);
ret = faccessat(AT_FDCWD, check_path, amode, flag);
free(check_path);
} else {
dir = "";
ret = access(file, amode);
ret = faccessat(AT_FDCWD, file, amode, flag);
}
if(ret != 0) {