72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
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#include <dirent.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#define BUF_SIZE 1024
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struct linux_dirent {
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uint32_t inode;
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uint16_t rec_len;
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uint8_t name_len;
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uint8_t file_type;
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char* name;
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};
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int main(int argc, char** argv)
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{
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int fd, nread;
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char buf[BUF_SIZE];
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struct linux_dirent* d;
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int bpos;
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char d_type;
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char has_path = 0;
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char show_inodes = 0;
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char show_private = 0;
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for (int i = 1; i < argc; i++) {
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if (memcmp(argv[i], "-i", 3) == 0) {
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show_inodes = 1;
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} else if (memcmp(argv[i], "-a", 3) == 0) {
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show_private = 1;
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} else {
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has_path = 1;
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}
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}
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if (has_path) {
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fd = open(argv[1], O_RDONLY | O_DIRECTORY);
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} else {
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fd = open(".", O_RDONLY | O_DIRECTORY);
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}
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if (fd < 0) {
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printf("ls: can't open file\n");
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return -1;
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}
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for (;;) {
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nread = getdents(fd, buf, BUF_SIZE);
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if (nread < 0) {
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printf("ls: can't read dir\n");
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return -1;
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}
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if (nread == 0)
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break;
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for (bpos = 0; bpos < nread;) {
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d = (struct linux_dirent*)(buf + bpos);
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if (((char*)&d->name)[0] != '.' || show_private) {
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printf("%s", (char*)&d->name);
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if (show_inodes) {
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printf(" %d", d->inode);
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}
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printf("\n");
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}
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bpos += d->rec_len;
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}
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}
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return 0;
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}
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