mirror of
https://github.com/jart/cosmopolitan.git
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91 lines
3.9 KiB
C
91 lines
3.9 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 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/calls/struct/stat.h"
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#include "libc/errno.h"
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#include "libc/str/path.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/s.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Creates directory and parent components.
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*
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* This function is similar to mkdir() except it iteratively creates
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* parent directories and it won't fail if the directory already exists.
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*
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* @param path is a UTF-8 string, preferably relative w/ forward slashes
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* @param mode can be, for example, 0755
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* @return 0 on success or -1 w/ errno
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* @raise EEXIST if named file already exists as non-directory
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* @raise ENOTDIR if directory component in `path` existed as non-directory
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* @raise ENAMETOOLONG if symlink-resolved `path` length exceeds `PATH_MAX`
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* @raise ENAMETOOLONG if component in `path` exists longer than `NAME_MAX`
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* @raise EROFS if parent directory is on read-only filesystem
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* @raise ENOSPC if file system or parent directory is full
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* @raise EACCES if write permission was denied on parent directory
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* @raise EACCES if search permission was denied on component in `path`
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* @raise ENOENT if `path` is an empty string
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* @raise ELOOP if loop was detected resolving components of `path`
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* @asyncsignalsafe
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* @threadsafe
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*/
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int makedirs(const char *path, unsigned mode) {
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int c, e, i, n;
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struct stat st;
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char buf[PATH_MAX];
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e = errno;
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n = strlen(path);
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if (n >= PATH_MAX) return enametoolong();
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memcpy(buf, path, n + 1);
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i = n;
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// descend
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while (i) {
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if (!mkdir(buf, mode)) break;
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if (errno == EEXIST) {
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if (i == n) goto CheckTop;
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break;
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}
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if (errno != ENOENT) return -1;
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while (i && _isdirsep(buf[i - 1])) buf[--i] = 0;
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while (i && !_isdirsep(buf[i - 1])) buf[--i] = 0;
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}
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// ascend
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for (;;) {
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if (mkdir(buf, mode)) {
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if (errno != EEXIST) return -1;
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if (i == n) goto CheckTop;
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}
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if (i == n) break;
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while (i < n && !_isdirsep((c = path[i]))) buf[i++] = c;
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while (i < n && _isdirsep((c = path[i]))) buf[i++] = c;
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}
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Finish:
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errno = e;
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return 0;
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CheckTop:
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if (stat(path, &st)) return -1;
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if (S_ISDIR(st.st_mode)) goto Finish;
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return eexist();
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}
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