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/* ls.c
Lists the contents of the directory or directories named on
the command line, or of the current directory if none are
named.
By default, only the name of each file is printed. If "-l" is
given as the first argument, the type, size, and inumber of each
file is also printed. This won't work until the stub filesystem
is replaced with a real filsystem. */
#include <syscall.h>
#include <stdio.h>
#include <string.h>
static bool
list_dir (const char *dir, bool verbose)
{
int dir_fd = open (dir);
if (dir_fd == -1)
{
printf ("%s: not found\n", dir);
return false;
}
if (isdir (dir_fd))
{
char name[READDIR_MAX_LEN];
printf ("%s", dir);
if (verbose)
printf (" (inumber %d)", inumber (dir_fd));
printf (":\n");
while (readdir (dir_fd, name))
{
printf ("%s", name);
if (verbose)
{
char full_name[128];
int entry_fd;
snprintf (full_name, sizeof full_name, "%s/%s", dir, name);
entry_fd = open (full_name);
printf (": ");
if (entry_fd != -1)
{
if (isdir (entry_fd))
printf ("directory");
else
printf ("%d-byte file", filesize (entry_fd));
printf (", inumber %d", inumber (entry_fd));
}
else
printf ("open failed");
close (entry_fd);
}
printf ("\n");
}
}
else
printf ("%s: not a directory\n", dir);
close (dir_fd);
return true;
}
int
main (int argc, char *argv[])
{
bool success = true;
bool verbose = false;
if (argc > 1 && !strcmp (argv[1], "-l"))
{
verbose = true;
argv++;
argc--;
}
if (argc <= 1)
success = list_dir (".", verbose);
else
{
int i;
for (i = 1; i < argc; i++)
if (!list_dir (argv[i], verbose))
success = false;
}
return success ? EXIT_SUCCESS : EXIT_FAILURE;
}
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