mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-18 03:22:40 +00:00
2fc507c98f
* modelines: tw -> sw shiftwidth, not textwidth. * space-surround modelines * fix irregular modelines * Fix modeline in titlegen.c
82 lines
3.9 KiB
C
82 lines
3.9 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
|
|
│ vi: set noet ft=c ts=8 sw=8 fenc=utf-8 :vi │
|
|
╚──────────────────────────────────────────────────────────────────────────────╝
|
|
│ │
|
|
│ Musl Libc │
|
|
│ Copyright © 2005-2014 Rich Felker, et al. │
|
|
│ │
|
|
│ Permission is hereby granted, free of charge, to any person obtaining │
|
|
│ a copy of this software and associated documentation files (the │
|
|
│ "Software"), to deal in the Software without restriction, including │
|
|
│ without limitation the rights to use, copy, modify, merge, publish, │
|
|
│ distribute, sublicense, and/or sell copies of the Software, and to │
|
|
│ permit persons to whom the Software is furnished to do so, subject to │
|
|
│ the following conditions: │
|
|
│ │
|
|
│ The above copyright notice and this permission notice shall be │
|
|
│ included in all copies or substantial portions of the Software. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
|
|
│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
|
|
│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
|
|
│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
|
|
│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
|
|
│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
|
|
│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
|
|
│ │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/struct/stat.internal.h"
|
|
#include "libc/calls/syscall-sysv.internal.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/sysv/consts/at.h"
|
|
#include "libc/sysv/consts/o.h"
|
|
#include "libc/sysv/consts/s.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
asm(".ident\t\"\\n\\n\
|
|
Musl libc (MIT License)\\n\
|
|
Copyright 2005-2014 Rich Felker, et. al.\"");
|
|
asm(".include \"libc/disclaimer.inc\"");
|
|
// clang-format off
|
|
|
|
static void __procfdname(char *buf, unsigned fd) {
|
|
unsigned i, j;
|
|
for (i = 0; (buf[i] = "/proc/self/fd/"[i]); i++);
|
|
if (!fd) {
|
|
buf[i] = '0';
|
|
buf[i + 1] = 0;
|
|
return;
|
|
}
|
|
for (j = fd; j; j /= 10, i++);
|
|
buf[i] = 0;
|
|
for (; fd; fd /= 10) buf[--i] = '0' + fd % 10;
|
|
}
|
|
|
|
int sys_fchmodat_linux(int fd, const char *path, unsigned mode, int flag) {
|
|
struct stat st;
|
|
int ret, fd2;
|
|
char proc[15 + 3 * sizeof(int)];
|
|
if (flag != AT_SYMLINK_NOFOLLOW)
|
|
return einval();
|
|
if (sys_fstatat(fd, path, &st, flag))
|
|
return -1;
|
|
if (S_ISLNK(st.st_mode))
|
|
return eopnotsupp();
|
|
if ((fd2 = sys_openat(fd, path, (O_RDONLY | O_PATH | O_NOFOLLOW |
|
|
O_NOCTTY | O_CLOEXEC), 0)) < 0) {
|
|
if (fd2 == -ELOOP)
|
|
return eopnotsupp();
|
|
return fd2;
|
|
}
|
|
__procfdname(proc, fd2);
|
|
ret = sys_fstatat(AT_FDCWD, proc, &st, 0);
|
|
if (!ret) {
|
|
if (S_ISLNK(st.st_mode))
|
|
ret = eopnotsupp();
|
|
else
|
|
ret = sys_fchmodat(AT_FDCWD, proc, mode, 0);
|
|
}
|
|
sys_close(fd2);
|
|
return ret;
|
|
}
|