47 lines
800 B
C
47 lines
800 B
C
#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <syscall.h>
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#include <errno.h>
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#include <bits/dirent.h>
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DIR * opendir (const char * dirname) {
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int fd = open(dirname, O_RDONLY);
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if (fd < 0) {
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errno = -fd;
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return NULL;
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}
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DIR * dir = (DIR *)malloc(sizeof(DIR));
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dir->fd = fd;
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dir->cur_entry = -1;
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return dir;
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}
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int closedir (DIR * dir) {
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if (dir && (dir->fd != -1)) {
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return close(dir->fd);
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} else {
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return -EBADF;
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}
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}
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struct dirent * readdir (DIR * dirp) {
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static struct dirent ent;
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int ret = syscall_readdir(dirp->fd, ++dirp->cur_entry, &ent);
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if (ret < 0) {
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errno = -ret;
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memset(&ent, 0, sizeof(struct dirent));
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return NULL;
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}
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if (ret == 0) {
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/* end of directory */
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memset(&ent, 0, sizeof(struct dirent));
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return NULL;
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}
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return &ent;
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}
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