forked from KolibriOS/kolibrios
2287b1e29b
Added new functions: - dir.h: mkdir, rmdir, chdir - dirent.h: alphasort, opendir, closedir, readdir, rewinddir, seekdir, telldir, scandir git-svn-id: svn://kolibrios.org@8759 a494cfbc-eb01-0410-851d-a64ba20cac60
47 lines
1017 B
C
47 lines
1017 B
C
#include <dirent.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <stddef.h>
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#define SIZE_MAX 256
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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(sizeof(struct dirent));
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if (!names[cnt]) break;
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memcpy(names[cnt++], de, sizeof(struct dirent));
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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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