path: root/src/stat/fchmodat.c
diff options
authorRich Felker <>2015-02-05 23:34:27 -0500
committerRich Felker <>2015-02-05 23:34:27 -0500
commit61b1d102129990f6e903c6ddcf46c7d79d1a1e99 (patch)
tree3ee30115dcaa23771352bd0c2bbf8204ee40d4cd /src/stat/fchmodat.c
parent2736eb6caa70bb6e909d7d8ebbe145c2071435e0 (diff)
fix failure of fchmodat to report EOPNOTSUPP in the race path
in the case where a non-symlink file was replaced by a symlink during the fchmodat operation with AT_SYMLINK_NOFOLLOW, mode change on the new symlink target was successfully suppressed, but the error was not reported. instead, fchmodat simply returned 0.
Diffstat (limited to 'src/stat/fchmodat.c')
1 files changed, 4 insertions, 2 deletions
diff --git a/src/stat/fchmodat.c b/src/stat/fchmodat.c
index a894cb69..d94667ae 100644
--- a/src/stat/fchmodat.c
+++ b/src/stat/fchmodat.c
@@ -29,8 +29,10 @@ int fchmodat(int fd, const char *path, mode_t mode, int flag)
__procfdname(proc, fd2);
ret = __syscall(SYS_fstatat, AT_FDCWD, proc, &st, 0);
- if (!ret && !S_ISLNK(st.st_mode))
- ret = __syscall(SYS_fchmodat, AT_FDCWD, proc, mode);
+ if (!ret) {
+ if (S_ISLNK(st.st_mode)) ret = -EOPNOTSUPP;
+ else ret = __syscall(SYS_fchmodat, AT_FDCWD, proc, mode);
+ }
__syscall(SYS_close, fd2);
return __syscall_ret(ret);