65 lines
3.3 KiB
C
65 lines
3.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/struct/stat.h"
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#include "libc/dce.h"
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#include "libc/nt/files.h"
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#include "libc/sysv/consts/at.h"
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#include "libc/sysv/consts/madv.h"
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#include "libc/sysv/consts/o.h"
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int copyfile(const char *frompath, const char *topath, bool dontoverwrite) {
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if (IsWindows()) {
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char16_t frompath16[PATH_MAX], topath16[PATH_MAX];
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if (mkntpath(frompath, frompath16) == -1) return -1;
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if (mkntpath(topath, topath16) == -1) return -1;
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if (CopyFile(frompath16, topath16, dontoverwrite)) {
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return 0;
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} else {
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return winerr();
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}
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} else {
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struct stat st;
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ssize_t transferred;
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int rc, fromfd, tofd;
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int64_t inoffset, outoffset;
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rc = -1;
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if ((fromfd = openat$sysv(AT_FDCWD, frompath, O_RDONLY, 0)) != -1) {
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if (fstat$sysv(fromfd, &st) != -1 &&
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(tofd = openat$sysv(AT_FDCWD, topath,
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O_WRONLY | O_CREAT | (dontoverwrite ? O_EXCL : 0),
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st.st_mode & 0777)) != -1) {
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inoffset = 0;
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outoffset = 0;
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while (st.st_size && (transferred = copy_file_range(
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fromfd, &inoffset, tofd, &outoffset,
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st.st_size, 0)) != -1) {
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st.st_size -= transferred;
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}
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if (!st.st_size) rc = 0;
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rc |= close$sysv(tofd);
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}
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rc |= close$sysv(fromfd);
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}
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return rc;
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}
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}
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