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https://github.com/jart/cosmopolitan.git
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c88f95a892
Unlike CMD.EXE, CreateProcess() doesn't care if an executable name ends with .COM or .EXE. We now have the unbourne shell and bash working well on Windows, so we don't need DOS anymore. Making this change will grant us better performance, particularly for builds, because commandv() will need to make fewer system calls. Path mangling magic still happens with WinMain() and ntspawn() in order to do things like turn \ into / so the interop works well at the borders. But all the code in libraries, which did that, has been removed. It's not possible for libraries to abstract the differences between paths.
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/limits.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 && buf[i - 1] == '/') buf[--i] = 0;
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while (i && 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 && (c = path[i]) != '/') buf[i++] = c;
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while (i < n && (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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