mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
b76b2be2d0
readdir() will now always yield an inode that's consistent with stat() on ZipOS and Windows in general. More APIs have been updated to return the appropriate error code when inappropriately trying to do ops, like sockets, with a zip file descriptor. The path normalization algorithms are now fully fleshed out. Some socket APIs have been fixed so they'll raise EBADF vs. ENOTSOCK appropriately. Lastly seekdir() will now work properly on NetBSD and FreeBSD (not sure why anyone would even use it)
128 lines
4.3 KiB
C
128 lines
4.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/cp.internal.h"
|
|
#include "libc/calls/internal.h"
|
|
#include "libc/calls/struct/iovec.h"
|
|
#include "libc/calls/struct/iovec.internal.h"
|
|
#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/intrin/kprintf.h"
|
|
#include "libc/intrin/likely.h"
|
|
#include "libc/intrin/strace.internal.h"
|
|
#include "libc/intrin/weaken.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
static ssize_t Pwritev(int fd, const struct iovec *iov, int iovlen,
|
|
int64_t off) {
|
|
int i, e;
|
|
size_t sent;
|
|
ssize_t rc, toto;
|
|
|
|
if (fd < 0) {
|
|
return ebadf();
|
|
}
|
|
|
|
if (iovlen < 0) {
|
|
return einval();
|
|
}
|
|
|
|
if (IsAsan() && !__asan_is_valid_iov(iov, iovlen)) {
|
|
return efault();
|
|
}
|
|
|
|
if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
|
|
return ebadf();
|
|
}
|
|
|
|
if (IsWindows()) {
|
|
if (fd < g_fds.n) {
|
|
return sys_write_nt(fd, iov, iovlen, off);
|
|
} else {
|
|
return ebadf();
|
|
}
|
|
}
|
|
|
|
if (IsMetal()) {
|
|
return espipe(); // must be serial or console if not zipos
|
|
}
|
|
|
|
while (iovlen && !iov->iov_len) {
|
|
--iovlen;
|
|
++iov;
|
|
}
|
|
|
|
if (!iovlen) {
|
|
return sys_pwrite(fd, 0, 0, off, off);
|
|
}
|
|
|
|
if (iovlen == 1) {
|
|
return sys_pwrite(fd, iov->iov_base, iov->iov_len, off, off);
|
|
}
|
|
|
|
e = errno;
|
|
rc = sys_pwritev(fd, iov, iovlen, off, off);
|
|
if (rc != -1 || errno != ENOSYS) return rc;
|
|
errno = e;
|
|
|
|
for (toto = i = 0; i < iovlen; ++i) {
|
|
rc = sys_pwrite(fd, iov[i].iov_base, iov[i].iov_len, off, off);
|
|
if (rc == -1) {
|
|
if (!toto) {
|
|
toto = -1;
|
|
} else if (errno != EINTR) {
|
|
notpossible;
|
|
}
|
|
break;
|
|
}
|
|
sent = rc;
|
|
toto += sent;
|
|
off += sent;
|
|
if (sent != iov[i].iov_len) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return toto;
|
|
}
|
|
|
|
/**
|
|
* Writes data from multiple buffers to offset.
|
|
*
|
|
* Please note that it's not an error for a short write to happen. This
|
|
* can happen in the kernel if EINTR happens after some of the write has
|
|
* been committed. It can also happen if we need to polyfill this system
|
|
* call using pwrite().
|
|
*
|
|
* @return number of bytes actually sent, or -1 w/ errno
|
|
* @cancellationpoint
|
|
* @asyncsignalsafe
|
|
* @vforksafe
|
|
*/
|
|
ssize_t pwritev(int fd, const struct iovec *iov, int iovlen, int64_t off) {
|
|
ssize_t rc;
|
|
BEGIN_CANCELLATION_POINT;
|
|
rc = Pwritev(fd, iov, iovlen, off);
|
|
END_CANCELLATION_POINT;
|
|
STRACE("pwritev(%d, %s, %d, %'ld) → %'ld% m", fd,
|
|
DescribeIovec(rc != -1 ? rc : -2, iov, iovlen), iovlen, off, rc);
|
|
return rc;
|
|
}
|