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Make important improvements

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- Fix preadv() and pwritev() for old distros
- Introduce _npassert() and _unassert() macros
- Prove that file locks work properly on Windows
- Support fcntl(F_DUPFD_CLOEXEC) on more systems
This commit is contained in:
Justine Tunney 2022-09-14 21:29:50 -07:00
parent 1ad2f530f9
commit 3f49889841
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GPG key ID: BE714B4575D6E328
130 changed files with 1225 additions and 431 deletions
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8
libc/calls/fcntl-sysv.c
View file

@ -20,12 +20,14 @@
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/calls/syscall_support-sysv.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/asan.internal.h"
#include "libc/sysv/consts/f.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/errfuns.h"
int sys_fcntl(int fd, int cmd, uintptr_t arg) {
int rc;
int e, rc;
bool islock;
if ((islock = cmd == F_GETLK || //
cmd == F_SETLK || //
@ -37,9 +39,13 @@ int sys_fcntl(int fd, int cmd, uintptr_t arg) {
}
cosmo2flock(arg);
}
e = errno;
rc = __sys_fcntl(fd, cmd, arg);
if (islock) {
flock2cosmo(arg);
} else if (rc == -1 && cmd == F_DUPFD_CLOEXEC && errno == EINVAL) {
errno = e;
rc = __fixupnewfd(__sys_fcntl(fd, F_DUPFD, arg), O_CLOEXEC);
}
return rc;
}