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/*
* Parse command-line options.
*
* Copyright 2012 Andrew Wood, distributed under the Artistic License 2.0.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "options.h"
#include "library/getopt.h"
#include "pv.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
void display_help(void);
void display_version(void);
/*
* Free an opts_t object.
*/
void opts_free(opts_t opts)
{
if (!opts)
return;
if (opts->argv)
free(opts->argv);
free(opts);
}
/*
* Parse the given command-line arguments into an opts_t object, handling
* "help", "license" and "version" options internally.
*
* Returns an opts_t, or 0 on error.
*
* Note that the contents of *argv[] (i.e. the command line parameters)
* aren't copied anywhere, just the pointers are copied, so make sure the
* command line data isn't overwritten or argv[1] free()d or whatever.
*/
opts_t opts_parse(int argc, char **argv)
{
#ifdef HAVE_GETOPT_LONG
struct option long_options[] = {
{"help", 0, 0, 'h'},
{"version", 0, 0, 'V'},
{"progress", 0, 0, 'p'},
{"timer", 0, 0, 't'},
{"eta", 0, 0, 'e'},
{"rate", 0, 0, 'r'},
{"average-rate", 0, 0, 'a'},
{"bytes", 0, 0, 'b'},
{"force", 0, 0, 'f'},
{"numeric", 0, 0, 'n'},
{"quiet", 0, 0, 'q'},
{"cursor", 0, 0, 'c'},
{"wait", 0, 0, 'W'},
{"size", 1, 0, 's'},
{"line-mode", 0, 0, 'l'},
{"interval", 1, 0, 'i'},
{"width", 1, 0, 'w'},
{"height", 1, 0, 'H'},
{"name", 1, 0, 'N'},
{"rate-limit", 1, 0, 'L'},
{"buffer-size", 1, 0, 'B'},
{"remote", 1, 0, 'R'},
{0, 0, 0, 0}
};
int option_index = 0;
#endif
char *short_options = "hVpterabfnqcWs:li:w:H:N:L:B:R:";
int c, numopts;
opts_t opts;
opts = calloc(1, sizeof(*opts));
if (!opts) {
fprintf(stderr, /* RATS: ignore */
_("%s: option structure allocation failed (%s)"),
argv[0], strerror(errno));
fprintf(stderr, "\n");
return 0;
}
opts->program_name = argv[0];
opts->argc = 0;
opts->argv = calloc(argc + 1, sizeof(char *));
if (!opts->argv) {
fprintf(stderr, /* RATS: ignore */
_
("%s: option structure argv allocation failed (%s)"),
argv[0], strerror(errno));
fprintf(stderr, "\n");
opts_free(opts);
return 0;
}
numopts = 0;
opts->interval = 1;
do {
#ifdef HAVE_GETOPT_LONG
c = getopt_long(argc, argv, /* RATS: ignore */
short_options, long_options,
&option_index);
#else
c = getopt(argc, argv, short_options); /* RATS: ignore */
#endif
if (c < 0)
continue;
/*
* Check that any numeric arguments are of the right type.
*/
switch (c) {
case 's':
case 'w':
case 'H':
case 'L':
case 'B':
case 'R':
if (pv_getnum_check(optarg, 0)) {
fprintf(stderr, "%s: -%c: %s\n", argv[0],
c, _("integer argument expected"));
opts_free(opts);
return 0;
}
break;
case 'i':
if (pv_getnum_check(optarg, 1)) {
fprintf(stderr, "%s: -%c: %s\n", argv[0],
c, _("numeric argument expected"));
opts_free(opts);
return 0;
}
break;
default:
break;
}
/*
* Parse each command line option.
*/
switch (c) {
case 'h':
display_help();
opts->do_nothing = 1;
return opts;
break;
case 'V':
display_version();
opts->do_nothing = 1;
return opts;
break;
case 'p':
opts->progress = 1;
numopts++;
break;
case 't':
opts->timer = 1;
numopts++;
break;
case 'e':
opts->eta = 1;
numopts++;
break;
case 'r':
opts->rate = 1;
numopts++;
break;
case 'a':
opts->average_rate = 1;
numopts++;
break;
case 'b':
opts->bytes = 1;
numopts++;
break;
case 'f':
opts->force = 1;
break;
case 'n':
opts->numeric = 1;
numopts++;
break;
case 'q':
opts->no_op = 1;
numopts++;
break;
case 'c':
opts->cursor = 1;
break;
case 'W':
opts->wait = 1;
break;
case 's':
opts->size = pv_getnum_ll(optarg);
break;
case 'l':
opts->linemode = 1;
break;
case 'i':
opts->interval = pv_getnum_d(optarg);
break;
case 'w':
opts->width = pv_getnum_i(optarg);
break;
case 'H':
opts->height = pv_getnum_i(optarg);
break;
case 'N':
opts->name = optarg;
break;
case 'L':
opts->rate_limit = pv_getnum_ll(optarg);
break;
case 'B':
opts->buffer_size = pv_getnum_ll(optarg);
break;
case 'R':
opts->remote = pv_getnum_i(optarg);
break;
default:
#ifdef HAVE_GETOPT_LONG
fprintf(stderr, /* RATS: ignore (OK) */
_("Try `%s --help' for more information."),
argv[0]);
#else
fprintf(stderr, /* RATS: ignore (OK) */
_("Try `%s -h' for more information."),
argv[0]);
#endif
fprintf(stderr, "\n");
opts_free(opts);
return 0;
break;
}
} while (c != -1);
/*
* Default options: -pterb
*/
if (numopts == 0) {
opts->progress = 1;
opts->timer = 1;
opts->eta = 1;
opts->rate = 1;
opts->bytes = 1;
}
/*
* Store remaining command-line arguments.
*/
while (optind < argc) {
opts->argv[opts->argc++] = argv[optind++];
}
opts->exit_status = 0;
return opts;
}
/* EOF */
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