diff options
Diffstat (limited to 'src/head.c')
| -rw-r--r-- | src/head.c | 40 |
1 files changed, 30 insertions, 10 deletions
diff --git a/src/head.c b/src/head.c index 82ad29141..2ab70af05 100644 --- a/src/head.c +++ b/src/head.c @@ -161,7 +161,7 @@ main (argc, argv) default: error (0, 0, "unrecognized option `-%c'", *argv[1]); - usage (); + usage (1); } ++argv[1]; } @@ -200,7 +200,7 @@ main (argc, argv) break; default: - usage (); + usage (1); } } @@ -211,7 +211,7 @@ main (argc, argv) } if (show_help) - usage (); + usage (0); if (number == -1) number = DEFAULT_NUMBER; @@ -396,12 +396,32 @@ atou (str) } static void -usage () +usage (status) + int status; { - fprintf (stderr, "\ -Usage: %s [-c N[bkm]] [-n N] [-qv] [--bytes=N[bkm]] [--lines=N]\n\ - [--quiet] [--silent] [--verbose] [--help] [--version] [file...]\n\ - %s [-Nbcklmqv] [--help] [--version] [file...]\n", - program_name, program_name); - exit (1); + if (status != 0) + fprintf (stderr, "Try `%s --help' for more information.\n", + program_name); + else + { + printf ("\ +Usage: %s [OPTION]... [FILE]...\n\ +", + program_name); + printf ("\ +\n\ + -c, --bytes SIZE print first SIZE bytes\n\ + -l, -n, --lines NUMBER print first NUMBER lines instead of first 10\n\ + -q, --quiet, --silent never print headers giving file names\n\ + -v, --verbose always print headers giving file names\n\ + --help display this help and exit\n\ + --version output version information and exit\n\ +\n\ +SIZE may have a multiplier suffix: b for 512, k for 1K, m for 1 Meg.\n\ +If -VALUE is used as first OPTION, read -c VALUE when one of\n\ +multipliers bkm follows concatenated, else read -n VALUE. With no\n\ +FILE, or when FILE is -, read standard input.\n\ +"); + } + exit (status); } |