diff options
| -rw-r--r-- | libc/sysdeps/linux/common/fchmodat.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/common/fchmodat.c b/libc/sysdeps/linux/common/fchmodat.c index 7d4dd4e2c..8224a528a 100644 --- a/libc/sysdeps/linux/common/fchmodat.c +++ b/libc/sysdeps/linux/common/fchmodat.c @@ -2,15 +2,36 @@ * fchmodat() for uClibc * * Copyright (C) 2009 Analog Devices Inc. + * Copyright (C) 2012 Mike Frysinger * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ +#include <fcntl.h> #include <sys/syscall.h> #include <sys/stat.h> #ifdef __NR_fchmodat -_syscall4(int, fchmodat, int, fd, const char *, file, mode_t, mode, int, flag) +/* + * The kernel takes 3 args, but userland takes 4. + * We have to process all the flags ourselves. + */ +int fchmodat(int fd, const char *file, mode_t mode, int flag) +{ + /* We only support one flag atm ... */ + if (flag & ~AT_SYMLINK_NOFOLLOW) { + __set_errno(EINVAL); + return -1; + } + + /* ... but Linux doesn't support perms on symlinks. */ + if (flag & AT_SYMLINK_NOFOLLOW) { + __set_errno(ENOTSUP); + return -1; + } + + return INLINE_SYSCALL(fchmodat, 3, fd, file, mode); +} #else /* should add emulation with fchmod() and /proc/self/fd/ ... */ #endif |