drop direct use of stat syscalls in fchmodat

[musl] / src / stat / fchmodat.c

diff --git a/src/stat/fchmodat.c b/src/stat/fchmodat.c
index c1410bc..bc58105 100644 (file)
--- a/src/stat/fchmodat.c
+++ b/src/stat/fchmodat.c
@@ -1,7 +1,6 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <errno.h>
-#include <stdio.h>
 #include "syscall.h"
 
 int fchmodat(int fd, const char *path, mode_t mode, int flag)
@@ -15,21 +14,24 @@ int fchmodat(int fd, const char *path, mode_t mode, int flag)
        int ret, fd2;
        char proc[15+3*sizeof(int)];
 
-       if ((ret = __syscall(SYS_fstatat, fd, path, &st, flag)))
-               return __syscall_ret(ret);
+       if (fstatat(fd, path, &st, flag))
+               return -1;
        if (S_ISLNK(st.st_mode))
                return __syscall_ret(-EOPNOTSUPP);
 
-       if ((fd2 = __syscall(SYS_openat, fd, path, O_RDONLY|O_PATH|O_NOFOLLOW|O_NOCTTY)) < 0) {
+       if ((fd2 = __syscall(SYS_openat, fd, path, O_RDONLY|O_PATH|O_NOFOLLOW|O_NOCTTY|O_CLOEXEC)) < 0) {
                if (fd2 == -ELOOP)
                        return __syscall_ret(-EOPNOTSUPP);
                return __syscall_ret(fd2);
        }
 
-       snprintf(proc, sizeof proc, "/proc/self/fd/%d", fd2);
-       if (!(ret = __syscall(SYS_stat, proc, &st)) && !S_ISLNK(st.st_mode))
-               ret = __syscall(SYS_chmod, proc, mode);
+       __procfdname(proc, fd2);
+       ret = stat(proc, &st);
+       if (!ret) {
+               if (S_ISLNK(st.st_mode)) ret = __syscall_ret(-EOPNOTSUPP);
+               else ret = syscall(SYS_fchmodat, AT_FDCWD, proc, mode);
+       }
 
        __syscall(SYS_close, fd2);
-       return __syscall_ret(ret);
+       return ret;
 }