mirror of
https://github.com/jart/cosmopolitan.git
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79 lines
3.7 KiB
C
79 lines
3.7 KiB
C
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/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│vi: set et ft=c ts=8 tw=8 fenc=utf-8 :vi│
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╚──────────────────────────────────────────────────────────────────────────────╝
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│ │
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│ Musl Libc │
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│ Copyright © 2005-2014 Rich Felker, et al. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/struct/dirent.h"
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#include "libc/errno.h"
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#include "libc/limits.h"
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#include "libc/mem/alg.h"
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#include "libc/mem/mem.h"
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#include "libc/str/str.h"
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asm(".ident\t\"\\n\\n\
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Musl libc (MIT License)\\n\
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Copyright 2005-2014 Rich Felker, et. al.\"");
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asm(".include \"libc/disclaimer.inc\"");
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// clang-format off
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int scandir(const char *path, struct dirent ***res,
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int (*sel)(const struct dirent *),
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int (*cmp)(const struct dirent **, const struct dirent **))
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{
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DIR *d = opendir(path);
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struct dirent *de, **names=0, **tmp;
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size_t cnt=0, len=0;
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int old_errno = errno;
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if (!d) return -1;
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while ((errno=0), (de = readdir(d))) {
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if (sel && !sel(de)) continue;
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if (cnt >= len) {
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len = 2*len+1;
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if (len > SIZE_MAX/sizeof *names) break;
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tmp = realloc(names, len * sizeof *names);
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if (!tmp) break;
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names = tmp;
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}
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names[cnt] = malloc(de->d_reclen);
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if (!names[cnt]) break;
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memcpy(names[cnt++], de, de->d_reclen);
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}
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closedir(d);
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if (errno) {
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if (names) while (cnt-->0) free(names[cnt]);
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free(names);
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return -1;
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}
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errno = old_errno;
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if (cmp) qsort(names, cnt, sizeof *names, (int (*)(const void *, const void *))cmp);
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*res = names;
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return cnt;
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}
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