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Fix fread() with 2gb+ sizes

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Justine Tunney 2024-05-24 19:28:23 -07:00
parent 5f61d273e4
commit ed93fc3dd7
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GPG key ID: BE714B4575D6E328
8 changed files with 254 additions and 119 deletions
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1
libc/calls/struct/iovec.internal.h
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@ -5,7 +5,6 @@
#include "libc/mem/alloca.h"
COSMOPOLITAN_C_START_
ssize_t __robust_writev(int, struct iovec *, int);
int64_t sys_preadv(int, struct iovec *, int, int64_t, int64_t);
int64_t sys_pwritev(int, const struct iovec *, int, int64_t, int64_t);
int64_t sys_readv(int32_t, const struct iovec *, int32_t);

45
libc/calls/writevuninterruptible.c
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@ -1,45 +0,0 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 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/struct/iovec.h"
#include "libc/calls/struct/iovec.internal.h"
#include "libc/errno.h"
ssize_t __robust_writev(int fd, struct iovec *iov, int iovlen) {
ssize_t rc;
size_t wrote;
do {
if ((rc = writev(fd, iov, iovlen)) != -1) {
wrote = rc;
do {
if (wrote >= iov->iov_len) {
wrote -= iov->iov_len;
++iov;
--iovlen;
} else {
iov->iov_base = (char *)iov->iov_base + wrote;
iov->iov_len -= wrote;
wrote = 0;
}
} while (wrote);
} else if (errno != EINTR) {
return -1;
}
} while (iovlen);
return 0;
}