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LibC: Add lutimes(2) and futimes(2) implementations

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Needed for a port of nix
This commit is contained in:
Emily Trau 2023-06-05 17:46:36 -07:00 • committed by Jelle Raaijmakers
parent c6c0ce78f5
commit b8c847a3cd
2 changed files with 30 additions and 4 deletions
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4
Userland/Libraries/LibC/sys/time.h
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@ -20,7 +20,9 @@ struct timezone {
int adjtime(const struct timeval* delta, struct timeval* old_delta);
int gettimeofday(struct timeval* __restrict__, void* __restrict__);
int settimeofday(struct timeval* __restrict__, void* __restrict__);
int utimes(char const* pathname, const struct timeval[2]);
int utimes(char const* pathname, struct timeval const times[2]);
int lutimes(char const* pathname, struct timeval const times[2]);
int futimes(int fd, struct timeval const times[2]);
static inline void timeradd(const struct timeval* a, const struct timeval* b, struct timeval* out)
{

30
Userland/Libraries/LibC/time.cpp
View file

@ -12,6 +12,7 @@
#include <assert.h>
#include <bits/pthread_cancel.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
@ -77,16 +78,39 @@ int settimeofday(struct timeval* __restrict__ tv, void* __restrict__)
return clock_settime(CLOCK_REALTIME, &ts);
}
int utimes(char const* pathname, const struct timeval times[2])
int utimes(char const* pathname, struct timeval const times[2])
{
if (!times) {
if (!times)
return utime(pathname, nullptr);
}
// FIXME: implement support for tv_usec in the utime (or a new) syscall
utimbuf buf = { times[0].tv_sec, times[1].tv_sec };
return utime(pathname, &buf);
}
// Not in POSIX, originated in BSD but also supported on Linux.
// https://man.netbsd.org/NetBSD-6.0/lutimes.2
int lutimes(char const* pathname, struct timeval const times[2])
{
if (!times)
return utimensat(AT_FDCWD, pathname, nullptr, AT_SYMLINK_NOFOLLOW);
timespec ts[2];
TIMEVAL_TO_TIMESPEC(&times[0], &ts[0]);
TIMEVAL_TO_TIMESPEC(&times[1], &ts[1]);
return utimensat(AT_FDCWD, pathname, ts, AT_SYMLINK_NOFOLLOW);
}
// Not in POSIX, originated in BSD but also supported on Linux.
// https://man.netbsd.org/NetBSD-6.0/futimes.2
int futimes(int fd, struct timeval const times[2])
{
if (!times)
return utimensat(fd, nullptr, nullptr, 0);
timespec ts[2];
TIMEVAL_TO_TIMESPEC(&times[0], &ts[0]);
TIMEVAL_TO_TIMESPEC(&times[1], &ts[1]);
return utimensat(fd, nullptr, ts, 0);
}
char* ctime(time_t const* t)
{
return asctime(localtime(t));