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Fix futimes() regression

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Fixes #647
This commit is contained in:
Justine Tunney 2022-10-05 19:25:07 -07:00
parent f155205eb0
commit 81ee11a16e
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GPG key ID: BE714B4575D6E328
22 changed files with 200 additions and 138 deletions
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34
libc/calls/setitimer.c
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@ -16,11 +16,11 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/strace.internal.h"
#include "libc/calls/struct/itimerval.h"
#include "libc/calls/struct/itimerval.internal.h"
#include "libc/dce.h"
#include "libc/intrin/asan.internal.h"
#include "libc/intrin/strace.internal.h"
#include "libc/sysv/errfuns.h"
#include "libc/time/time.h"
@ -29,28 +29,28 @@
*
* Raise SIGALRM every 1.5s:
*
* CHECK_NE(-1, sigaction(SIGALRM,
* &(struct sigaction){.sa_sigaction = _missingno},
* NULL));
* CHECK_NE(-1, setitimer(ITIMER_REAL,
* &(const struct itimerval){{1, 500000},
* {1, 500000}},
* NULL));
* sigaction(SIGALRM,
* &(struct sigaction){.sa_sigaction = _missingno},
* NULL);
* setitimer(ITIMER_REAL,
* &(const struct itimerval){{1, 500000},
* {1, 500000}},
* NULL);
*
* Set single-shot 50ms timer callback to interrupt laggy connect():
*
* CHECK_NE(-1, sigaction(SIGALRM,
* &(struct sigaction){.sa_sigaction = _missingno,
* .sa_flags = SA_RESETHAND},
* NULL));
* CHECK_NE(-1, setitimer(ITIMER_REAL,
* &(const struct itimerval){{0, 0}, {0, 50000}},
* NULL));
* sigaction(SIGALRM,
* &(struct sigaction){.sa_sigaction = _missingno,
* .sa_flags = SA_RESETHAND},
* NULL);
* setitimer(ITIMER_REAL,
* &(const struct itimerval){{0, 0}, {0, 50000}},
* NULL);
* if (connect(...) == -1 && errno == EINTR) { ... }
*
* Disarm timer:
*
* CHECK_NE(-1, setitimer(ITIMER_REAL, &(const struct itimerval){0}, NULL));
* setitimer(ITIMER_REAL, &(const struct itimerval){0}, NULL);
*
* Be sure to check for EINTR on your i/o calls, for best low latency.
*
@ -81,6 +81,7 @@ int setitimer(int which, const struct itimerval *newvalue,
rc = sys_setitimer_nt(which, newvalue, oldvalue);
}
#ifdef SYSDEBUG
if (newvalue && oldvalue) {
STRACE("setitimer(%d, "
"{{%'ld, %'ld}, {%'ld, %'ld}}, "
@ -100,6 +101,7 @@ int setitimer(int which, const struct itimerval *newvalue,
} else {
STRACE("setitimer(%d, NULL, NULL) → %d% m", which, rc);
}
#endif
return rc;
}