85 lines
1.5 KiB
C
85 lines
1.5 KiB
C
#include "types.h"
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#include "stat.h"
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#include "user.h"
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#include "fs.h"
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void
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pname(char *n)
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{
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int i;
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for(i = 0; (i < DIRSIZ) && (n[i] != '\0') ; i++) {
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printf(1, "%c", n[i]);
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}
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for(; i < DIRSIZ; i++)
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printf(1, " ");
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}
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int
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main(int argc, char *argv[])
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{
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char buf[512], *p;
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int fd;
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uint off, sz;
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struct dirent de;
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struct stat st;
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if(argc > 2){
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puts("Usage: ls [dir]\n");
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exit();
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}
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if(argc == 2) {
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fd = open(argv[1], 0);
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if(fd < 0){
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printf(2, "ls: cannot open %s\n", argv[1]);
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exit();
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}
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} else {
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fd = open(".", 0);
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if(fd < 0){
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printf(2, "ls: cannot open .\n");
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exit();
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}
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}
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if(fstat(fd, &st) < 0) {
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printf(2, "ls: cannot stat dir\n");
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exit();
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}
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switch(st.type) {
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case T_FILE:
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pname(argv[1]);
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printf(1, "%d %d %d\n", st.type, st.ino, st.size);
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break;
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case T_DIR:
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sz = st.size;
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for(off = 0; off < sz; off += sizeof(de)) {
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if(read(fd, &de, sizeof(de)) != sizeof(de)) {
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printf(1, "ls: read error\n");
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break;
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}
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if(de.inum != 0) {
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p = buf;
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if(argc == 2) {
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strcpy(p, argv[1]);
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p += strlen(p);
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if(*(p-1) != '/')
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*p++ = '/';
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}
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memmove(p, de.name, DIRSIZ);
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p[DIRSIZ] = 0;
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if(stat(buf, &st) < 0) {
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printf(1, "stat: failed %s\n", de.name);
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continue;
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}
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pname(de.name);
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printf(1, "%d %d %d\n", st.type, de.inum, st.size);
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}
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}
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break;
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}
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close(fd);
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exit();
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}
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