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Fix F_DUPFD_CLOEXEC on some systems

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Justine Tunney 2022-09-15 12:45:53 -07:00
parent a5fa90a21f
commit c64e7eaf7c
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GPG key ID: BE714B4575D6E328
1 changed files with 7 additions and 1 deletions
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8
libc/calls/fcntl-sysv.c
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@ -20,12 +20,14 @@
#include "libc/calls/syscall-sysv.internal.h" #include "libc/calls/syscall-sysv.internal.h"
#include "libc/calls/syscall_support-sysv.internal.h" #include "libc/calls/syscall_support-sysv.internal.h"
#include "libc/dce.h" #include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/asan.internal.h" #include "libc/intrin/asan.internal.h"
#include "libc/sysv/consts/f.h" #include "libc/sysv/consts/f.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/errfuns.h" #include "libc/sysv/errfuns.h"
int sys_fcntl(int fd, int cmd, uintptr_t arg) { int sys_fcntl(int fd, int cmd, uintptr_t arg) {
int rc; int e, rc;
bool islock; bool islock;
if ((islock = cmd == F_GETLK || // if ((islock = cmd == F_GETLK || //
cmd == F_SETLK || // cmd == F_SETLK || //
@ -37,9 +39,13 @@ int sys_fcntl(int fd, int cmd, uintptr_t arg) {
} }
cosmo2flock(arg); cosmo2flock(arg);
} }
e = errno;
rc = __sys_fcntl(fd, cmd, arg); rc = __sys_fcntl(fd, cmd, arg);
if (islock) { if (islock) {
flock2cosmo(arg); 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; return rc;
} }