X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fstat%2Ffchmodat.c;h=afa6d44b5401da8caec81c3cb78dea9b344b4748;hb=41421d6beb3f17aa8838f7cdaad9cd16b4c451f6;hp=f4f22b2c7f4f271c2402fd5a8ebb250dbc7858e9;hpb=0b44a0315b47dd8eced9f3b7f31580cf14bbfc01;p=musl

diff --git a/src/stat/fchmodat.c b/src/stat/fchmodat.c
index f4f22b2c..afa6d44b 100644
--- a/src/stat/fchmodat.c
+++ b/src/stat/fchmodat.c
@@ -1,7 +1,37 @@
 #include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
 #include "syscall.h"
 
+void __procfdname(char *, unsigned);
+
 int fchmodat(int fd, const char *path, mode_t mode, int flag)
 {
-	return syscall4(__NR_fchmodat, fd, (long)path, mode, flag);
+	if (!flag) return syscall(SYS_fchmodat, fd, path, mode, flag);
+
+	if (flag != AT_SYMLINK_NOFOLLOW)
+		return __syscall_ret(-EINVAL);
+
+	struct stat st;
+	int ret, fd2;
+	char proc[15+3*sizeof(int)];
+
+	if ((ret = __syscall(SYS_fstatat, fd, path, &st, flag)))
+		return __syscall_ret(ret);
+	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 == -ELOOP)
+			return __syscall_ret(-EOPNOTSUPP);
+		return __syscall_ret(fd2);
+	}
+
+	__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);
+
+	__syscall(SYS_close, fd2);
+	return __syscall_ret(ret);
 }