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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
64 lines
2.9 KiB
C
64 lines
2.9 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/errno.h"
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#include "libc/serialize.h"
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#include "libc/stdio/rand.h"
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#include "libc/str/str.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/temp.h"
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/**
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* Creates temporary directory, e.g.
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*
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* char path[] = "/tmp/foo.XXXXXX";
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* mkdtemp(path);
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* rmdir(path);
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*
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* @param template must end with XXXXXX which will be replaced
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* with random text on success (and not modified on error)
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* @return pointer to template on success, or NULL w/ errno
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* @raise EINVAL if template didn't end with XXXXXX
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* @cancelationpoint
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*/
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char *mkdtemp(char *template) {
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int n;
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if ((n = strlen(template)) < 6 ||
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READ32LE(template + n - 6) != READ32LE("XXXX") ||
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READ16LE(template + n - 6 + 4) != READ16LE("XX")) {
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einval();
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return 0;
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}
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for (;;) {
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int x = _rand64();
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for (int i = 0; i < 6; ++i) {
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template[n - 6 + i] = "0123456789abcdefghikmnpqrstvwxyz"[x & 31];
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x >>= 5;
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}
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int e = errno;
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if (!mkdir(template, 0700)) {
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return template;
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} else if (errno != EEXIST) {
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memcpy(template + n - 6, "XXXXXX", 6);
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return 0;
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}
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errno = e;
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}
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}
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