diff options
Diffstat (limited to 'ufs')
| -rw-r--r-- | ufs/main.c | 78 |
1 files changed, 56 insertions, 22 deletions
@@ -26,40 +26,74 @@ #include <stdlib.h> char *ufs_version = "0.0 pre-alpha"; + +/* ---------------------------------------------------------------- */ +#define USAGE "Usage: %s [OPTION...] DEVICE\n" + +static void +usage(int status) +{ + if (status != 0) + fprintf(stderr, "Try `%s --help' for more information.\n", + program_invocation_name); + else + { + printf(USAGE, program_invocation_name); + printf("\ +\n\ + -r, --readonly disable writing to DEVICE\n\ + -w, --writable enable writing to DEVICE\n\ + -s, --sync[=INTERVAL] with an argument, sync every INTERVAL seconds,\n\ + otherwise operate in synchronous mode\n\ + -n, --nosync never sync the filesystem\n\ + --help display this help and exit\n\ + --version output version information and exit\n\ +"); + } + exit (status); +} + +#define SHORT_OPTS "" + +static struct option long_opts[] = +{ + {"help", no_argument, 0, '?'}, + {0, 0, 0, 0} +}; + +static error_t +parse_opt (int opt, char *arg) +{ + /* We currently only deal with one option... */ + if (opt != '?') + return EINVAL; + usage (0); /* never returns */ + return 0; +} /* Parse the arguments for ufs when started as a translator. */ char * trans_parse_args (int argc, char **argv) { - char *devname; - /* When started as a translator, we are called with - the device name and an optional argument -r, which - signifies read-only. */ - if (argc < 2 || argc > 3) - exit (1); + int argind; /* ARGV index of the first argument. */ + struct options options = + { SHORT_OPTS, long_opts, parse_opt, diskfs_standard_startup_options }; - if (argc == 2) - devname = argv[1]; + /* Parse our command line. */ + if (options_parse (&options, argc, argv, OPTIONS_PRINT_ERRS, &argind)) + usage (1); - else if (argc == 3) + if (argc - argind != 1) { - if (argv[1][0] == '-' && argv[1][1] == 'r') - { - diskfs_readonly = 1; - devname = argv[2]; - } - else if (argv[2][0] == '-' && argv[2][1] == 'r') - { - diskfs_readonly = 1; - devname = argv[1]; - } - else - exit (1); + fprintf (stderr, USAGE, program_invocation_name); + usage (1); } - return devname; + return argv[argind]; } + +/* ---------------------------------------------------------------- */ struct node *diskfs_root_node; |