diff options
Diffstat (limited to 'utils/showtrans.c')
| -rw-r--r-- | utils/showtrans.c | 131 |
1 files changed, 61 insertions, 70 deletions
diff --git a/utils/showtrans.c b/utils/showtrans.c index 991ffa58..bada3f04 100644 --- a/utils/showtrans.c +++ b/utils/showtrans.c @@ -22,105 +22,65 @@ #include <stdio.h> #include <stdlib.h> #include <string.h> -#include <getopt.h> +#include <argp.h> #include <fcntl.h> #include <unistd.h> #include <error.h> #include <argz.h> - -/* ---------------------------------------------------------------- */ - -#define USAGE "Usage: %s [OPTION...] FILE...\n" -#define SHORT_OPTIONS "hs?" - -static void -usage(status) - int status; +static struct argp_option options[] = { - if (status != 0) - fprintf(stderr, "Try `%s --help' for more information.\n", - program_invocation_name); - else - { - printf(USAGE, program_invocation_name); - printf("\ -\n\ - -p, --prefix always display `FILENAME: ' before translators\n\ - -P, --no-prefix never display `FILENAME: ' before translators\n\ - -s, --silent no output; useful when checking error status\n\ - --help give this help list\n\ -"); - } + {"prefix", 'p', 0, 0, "always display `FILENAME: ' before translators"}, + {"no-prefix", 'P', 0, 0, "never display `FILENAME: ' before translators"}, + {"silent", 's', 0, 0, "no output; useful when checking error status"}, + {"quiet", 'q', 0, OPTION_ALIAS | OPTION_HIDDEN}, + {0, 0} +}; - exit(status); -} +static char *args_doc = "FILE..."; -static struct option options[] = -{ - {"prefix", no_argument, 0, 'p'}, - {"no-prefix", no_argument, 0, 'P'}, - {"silent", no_argument, 0, 's'}, - {"quiet", no_argument, 0, 's'}, - {"help", no_argument, 0, '&'}, - {0, 0, 0, 0} -}; +static char *doc = "If there are no args, the translator on the node attached \ +to standard input is printed. A FILE argument of `-' also does this."; /* ---------------------------------------------------------------- */ void -main(int argc, char *argv[]) +main (int argc, char *argv[]) { - int opt; - /* The default exits status -- changed to 0 if we find any translators. */ + /* The default exit status -- changed to 0 if we find any translators. */ int status = 1; - /* Some option flags. */ + /* Some option flags. -1 for PRINT_PREFIX means use the default. */ int print_prefix = -1, silent = 0; - /* Parse our options... */ - while ((opt = getopt_long(argc, argv, "+" SHORT_OPTIONS, options, 0)) != EOF) - switch (opt) - { - case 'p': print_prefix = 1; break; - case 'P': print_prefix = 0; break; - case 's': silent = 1; break; - case '&': usage(0); break; - default: usage(-1); break; - } - - if (print_prefix < 0) - /* By default, only print a filename prefix if there are multiple files. */ - print_prefix = (argc > optind + 1); - - while (optind != argc) + /* If NODE is MACH_PORT_NULL, prints an error message and exits, otherwise + prints the translator on NODE, possibly prefixed by `NAME:', and + deallocates NODE. */ + void print_node_trans (file_t node, char *name) { - char *node_name = argv[optind++]; - file_t node = file_name_lookup(node_name, O_NOTRANS, 0); - if (node == MACH_PORT_NULL) - error(0, errno, "%s", node_name); + error (0, errno, "%s", name); else { char buf[1024], *trans = buf; - int trans_len = sizeof(buf); - error_t err = file_get_translator(node, &trans, &trans_len); + int trans_len = sizeof (buf); + error_t err = file_get_translator (node, &trans, &trans_len); switch (err) { case 0: /* Make the '\0's in TRANS printable. */ - argz_stringify(trans, trans_len); + argz_stringify (trans, trans_len); if (!silent) if (print_prefix) - printf("%s: %s\n", node_name, trans); + printf ("%s: %s\n", name, trans); else - puts(trans); + puts (trans); if (trans != buf) - vm_deallocate(mach_task_self(), - (vm_address_t)trans, trans_len); + vm_deallocate (mach_task_self (), + (vm_address_t)trans, trans_len); status = 0; @@ -129,16 +89,47 @@ main(int argc, char *argv[]) case EINVAL: /* NODE just doesn't have a translator. */ if (!silent && print_prefix) - puts(node_name); + puts (name); break; default: - error(0, err, "%s", node_name); + error (0, err, "%s", name); } - mach_port_deallocate(mach_task_self(), node); + mach_port_deallocate (mach_task_self (), node); } } - exit(status); + /* Parse a command line option. */ + error_t parse_opt (int key, char *arg, struct argp_state *state) + { + switch (key) + { + case ARGP_KEY_NO_ARGS: /* The end of the argument list */ + case ARGP_KEY_ARG: /* A FILE argument */ + if (print_prefix < 0) + /* By default, only print a prefix if there are multiple files. */ + print_prefix = (argc > state->index + 1); + + if (arg && strcmp (arg, "-") != 0) + print_node_trans (file_name_lookup (arg, O_NOTRANS, 0), arg); + else + print_node_trans (getdport (0), "-"); + break; + + /* Options. */ + case 'p': print_prefix = 1; break; + case 'P': print_prefix = 0; break; + case 's': case 'q': silent = 1; break; + + default: return EINVAL; + } + return 0; + } + + struct argp argp = {options, parse_opt, args_doc, doc}; + + argp_parse (&argp, argc, argv, 0, 0); + + exit (status); } |