xv6-65oo2/ls.c
kaashoek 1f544842ce fstat
primitive ls
2006-08-12 04:33:50 +00:00

44 lines
758 B
C

#include "types.h"
#include "stat.h"
#include "user.h"
#include "fs.h"
char buf[512];
struct stat stat;
struct dirent dirent;
int
main(int argc, char *argv[])
{
int fd;
uint off;
if(argc > 1){
puts("Usage: ls\n");
exit();
}
fd = open(".", 0);
if(fd < 0){
printf(2, "ls: cannot open .\n");
exit();
}
if (fstat(fd, &stat) < 0) {
printf(2, "ls: cannot open .\n");
exit();
}
if (stat.st_type != T_DIR) {
printf(2, "ls: . is not a dir\n");
}
for(off = 0; off < stat.st_size; off += sizeof(struct dirent)) {
if (read(fd, &dirent, sizeof(struct dirent)) != sizeof(struct dirent)) {
printf(2, "ls: read error\n");
exit();
}
printf(1, "%s\n", dirent.name);
}
close(fd);
exit();
}