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- Introduce ualarm() function
- Make rename() report EISEMPTY on Windows
- Always raise EINVAL upon open(O_RDONLY|O_TRUNC)
- Add macro so ./configure will detect SOCK_CLOEXEC
- Fix O_TRUNC without O_CREAT not working on Windows
- Let fcntl(F_SETFL) change O_APPEND status on Windows
- Make sure pwrite() / pread() report ESPIPE on sockets
- Raise ESPIPE on Windows when pwrite() is used on pipe
- Properly compute O_APPEND CreateFile() flags on Windows
- Don't require O_DIRECTORY to open directories on Windows
- Fix more instances of Windows reporting EISDIR and ENOTDIR
- Normalize EFTYPE and EMLINK to ELOOP on NetBSD and FreeBSD
- Make unlink() / rmdir() work on read-only files on Windows
- Validate UTF-8 on Windows paths to fix bug with overlong NUL
- Always print signal name to stderr when crashing due to SIG_DFL
- Fix Windows bug where denormalized paths >260 chars didn't work
- Block signals on BSDs when thread exits before trashing its own stack
This commit is contained in:
Justine Tunney 2023-08-21 02:28:24 -07:00
parent ec957491ea
commit ebf784d4f5
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GPG key ID: BE714B4575D6E328
76 changed files with 1019 additions and 568 deletions
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22
libc/calls/fcntl.c
View file

@ -27,9 +27,9 @@
#include "libc/intrin/describeflags.internal.h"
#include "libc/intrin/strace.internal.h"
#include "libc/intrin/weaken.h"
#include "libc/runtime/zipos.internal.h"
#include "libc/sysv/consts/f.h"
#include "libc/sysv/errfuns.h"
#include "libc/runtime/zipos.internal.h"
/**
* Does things with file descriptor, e.g.
@ -57,6 +57,12 @@
* - `F_SETFD` sets `FD_CLOEXEC` status of `arg` file descriptor
* - `F_GETFL` returns file descriptor status flags
* - `F_SETFL` sets file descriptor status flags
* - `O_NONBLOCK` may be changed
* - `O_APPEND` may be changed
* - `O_DIRECT` may be changed
* - `O_SEQUENTIAL` may be changed (no-op on non-Windows)
* - `O_RANDOM` may be changed (no-op on non-Windows)
* - Other bits (`O_ACCMODE`, `O_CREAT`, etc.) are ignored
* - `F_DUPFD` is like dup() but `arg` is a minimum result, e.g. 3
* - `F_DUPFD_CLOEXEC` ditto but sets `O_CLOEXEC` on returned fd
* - `F_SETLK` for record locking where `arg` is `struct flock *`
@ -131,11 +137,15 @@ int fcntl(int fd, int cmd, ...) {
}
#ifdef SYSDEBUG
if (cmd == F_GETFD || //
cmd == F_GETOWN || //
cmd == F_FULLFSYNC || //
cmd == F_BARRIERFSYNC || //
cmd == F_MAXFD) {
if (rc != -1 && cmd == F_GETFL) {
STRACE("fcntl(%d, F_GETFL) → %s", fd, DescribeOpenFlags(rc));
} else if (cmd == F_SETFL) {
STRACE("fcntl(%d, F_SETFL, %s) → %d% m", fd, DescribeOpenFlags(arg), rc);
} else if (cmd == F_GETFD || //
cmd == F_GETOWN || //
cmd == F_FULLFSYNC || //
cmd == F_BARRIERFSYNC || //
cmd == F_MAXFD) {
STRACE("fcntl(%d, %s) → %d% m", fd, DescribeFcntlCmd(cmd), rc);
} else if (cmd == F_GETFL) {
STRACE("fcntl(%d, %s) → %s% m", fd, DescribeFcntlCmd(cmd),