mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
f531acc8f9
- Invent openatemp() API - Invent O_UNLINK open flag - Introduce getenv_secure() API - Remove `git pull` from cosmocc - Fix utimes() when path is NULL - Fix mktemp() to never return NULL - Fix utimensat() UTIME_OMIT on XNU - Improve utimensat() code for RHEL5 - Turn `argv[0]` C:/ to /C/ on Windows - Introduce tmpnam() and tmpnam_r() APIs - Fix more const issues with internal APIs - Permit utimes() on WIN32 in O_RDONLY mode - Fix fdopendir() to check fd is a directory - Fix recent crash regression in landlock make - Fix futimens(AT_FDCWD, NULL) to return EBADF - Use workaround so `make -j` doesn't fork bomb - Rename dontdiscard to __wur (just like glibc) - Fix st_size for WIN32 symlinks containing UTF-8 - Introduce stdio ext APIs needed by GNU coreutils - Fix lstat() on WIN32 for symlinks to directories - Move some constants from normalize.inc to limits.h - Fix segv with memchr() and memcmp() overlapping page - Implement POSIX fflush() behavior for reader streams - Implement AT_SYMLINK_NOFOLLOW for utimensat() on WIN32 - Don't change read-only status of existing files on WIN32 - Correctly handle `0x[^[:xdigit:]]` case in strtol() functions
117 lines
4.2 KiB
C
117 lines
4.2 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/assert.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/stat.h"
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#include "libc/calls/struct/stat.internal.h"
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#include "libc/calls/struct/timespec.internal.h"
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#include "libc/calls/struct/timeval.h"
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#include "libc/calls/struct/timeval.internal.h"
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#include "libc/dce.h"
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#include "libc/fmt/itoa.h"
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#include "libc/limits.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/at.h"
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#include "libc/sysv/consts/utime.h"
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#include "libc/sysv/errfuns.h"
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int sys_utimensat_old(int dirfd, const char *path, const struct timespec ts[2],
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int flags) {
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char buf[PATH_MAX + 1];
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// validate usage
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if (path) {
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if (dirfd != AT_FDCWD) {
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return enotsup();
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}
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} else {
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unassert(dirfd >= 0);
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}
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if (flags) {
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return einval();
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}
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// xnu has futimes(), but rhel5 only has utimes()
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// on linux we'll try to get the path from procfs
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if (IsLinux() && !path) {
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char procpath[36];
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char *p = procpath;
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p = stpcpy(p, "/proc/");
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p = FormatInt32(p, getpid());
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p = stpcpy(p, "/fd/");
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p = FormatInt32(p, dirfd);
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ssize_t got;
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if ((got = readlink(procpath, buf, sizeof(buf))) == -1) {
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return -1;
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}
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if (got == sizeof(buf)) {
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return enametoolong();
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}
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unassert(buf[0] == '/');
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buf[got] = 0;
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path = buf;
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}
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// perform preliminary system calls ahead of time
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struct timeval now;
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if (!ts || ts[0].tv_nsec == UTIME_NOW || ts[1].tv_nsec == UTIME_NOW) {
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unassert(!gettimeofday(&now, 0));
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}
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struct stat st;
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if (ts && (ts[0].tv_nsec == UTIME_OMIT || ts[1].tv_nsec == UTIME_OMIT)) {
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if (path) {
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if (sys_fstatat(AT_FDCWD, path, &st, 0) == -1) {
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return -1;
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}
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} else {
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if (sys_fstat(dirfd, &st) == -1) {
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return -1;
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}
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}
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}
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// change the timestamps
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struct timeval tv[2];
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if (ts) {
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if (ts[0].tv_nsec == UTIME_NOW) {
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tv[0] = now;
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} else if (ts[0].tv_nsec == UTIME_OMIT) {
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tv[0] = timespec_totimeval(st.st_atim);
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} else {
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tv[0] = timespec_totimeval(ts[0]);
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}
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if (ts[1].tv_nsec == UTIME_NOW) {
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tv[1] = now;
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} else if (ts[1].tv_nsec == UTIME_OMIT) {
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tv[1] = timespec_totimeval(st.st_mtim);
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} else {
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tv[1] = timespec_totimeval(ts[1]);
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}
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} else {
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tv[0] = now;
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tv[1] = now;
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}
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// apply the new timestamps
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if (path) {
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return sys_utimes(path, tv);
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} else {
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return sys_futimes(dirfd, tv);
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}
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}
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