alexvoste
59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
#include <dirent.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <sys/syscall.h>
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typedef struct {
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uint64_t d_ino;
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uint8_t d_type;
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char d_name[256];
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} __kernel_dirent_t;
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struct __cervus_DIR {
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int fd;
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struct dirent buf;
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};
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DIR *opendir(const char *path)
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{
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int fd = open(path, O_RDONLY | O_DIRECTORY, 0);
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if (fd < 0) return NULL;
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DIR *d = (DIR *)malloc(sizeof(DIR));
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if (!d) { close(fd); return NULL; }
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d->fd = fd;
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return d;
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}
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struct dirent *readdir(DIR *dirp)
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{
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if (!dirp) return NULL;
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__kernel_dirent_t kde;
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int r = (int)syscall2(SYS_READDIR, dirp->fd, &kde);
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if (r != 0) return NULL;
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dirp->buf.d_ino = kde.d_ino;
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dirp->buf.d_type = kde.d_type;
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size_t nl = strlen(kde.d_name);
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if (nl >= sizeof(dirp->buf.d_name)) nl = sizeof(dirp->buf.d_name) - 1;
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memcpy(dirp->buf.d_name, kde.d_name, nl);
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dirp->buf.d_name[nl] = '\0';
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return &dirp->buf;
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}
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int closedir(DIR *dirp)
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{
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if (!dirp) return -1;
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int fd = dirp->fd;
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free(dirp);
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return close(fd);
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}
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void rewinddir(DIR *dirp)
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{
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if (!dirp) return;
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lseek(dirp->fd, 0, SEEK_SET);
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}
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int dirfd(DIR *dirp) { return dirp ? dirp->fd : -1; } |