lib/roken/getarg.c

   1 /*
   2  * Copyright (c) 1997 - 2002 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <config.h>
  35
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include "roken.h"
  40 #include "getarg.h"
  41
  42 #define ISFLAG(X) ((X).type == arg_flag || (X).type == arg_negative_flag)
  43
  44 static size_t
  45 print_arg (char *string,
  46            size_t len,
  47            int mdoc,
  48            int longp,
  49            struct getargs *arg,
  50            char *(i18n)(const char *))
  51 {
  52     const char *s;
  53
  54     *string = '\0';
  55
  56     if (ISFLAG(*arg) || (!longp && arg->type == arg_counter))
  57         return 0;
  58
  59     if(mdoc){
  60         if(longp)
  61             strlcat(string, "= Ns", len);
  62         strlcat(string, " Ar ", len);
  63     } else {
  64         if (longp)
  65             strlcat (string, "=", len);
  66         else
  67             strlcat (string, " ", len);
  68     }
  69
  70     if (arg->arg_help)
  71         s = (*i18n)(arg->arg_help);
  72     else if (arg->type == arg_integer || arg->type == arg_counter)
  73         s = "integer";
  74     else if (arg->type == arg_string)
  75         s = "string";
  76     else if (arg->type == arg_strings)
  77         s = "strings";
  78     else if (arg->type == arg_double)
  79         s = "float";
  80     else
  81         s = "<undefined>";
  82
  83     strlcat(string, s, len);
  84     return 1 + strlen(s);
  85 }
  86
  87 static void
  88 mandoc_template(struct getargs *args,
  89                 size_t num_args,
  90                 const char *progname,
  91                 const char *extra_string,
  92                 char *(i18n)(const char *))
  93 {
  94     int i;
  95     char timestr[64], cmd[64];
  96     char buf[128];
  97     const char *p;
  98     time_t t;
  99
 100     printf(".\\\" Things to fix:\n");
 101     printf(".\\\"   * correct section, and operating system\n");
 102     printf(".\\\"   * remove Op from mandatory flags\n");
 103     printf(".\\\"   * use better macros for arguments (like .Pa for files)\n");
 104     printf(".\\\"\n");
 105     t = time(NULL);
 106     strftime(timestr, sizeof(timestr), "%B %e, %Y", localtime(&t));
 107     printf(".Dd %s\n", timestr);
 108     p = strrchr(progname, '/');
 109     if(p) p++; else p = progname;
 110     strlcpy(cmd, p, sizeof(cmd));
 111     strupr(cmd);
 112
 113     printf(".Dt %s SECTION\n", cmd);
 114     printf(".Os OPERATING_SYSTEM\n");
 115     printf(".Sh NAME\n");
 116     printf(".Nm %s\n", p);
 117     printf(".Nd\n");
 118     printf("in search of a description\n");
 119     printf(".Sh SYNOPSIS\n");
 120     printf(".Nm\n");
 121     for(i = 0; i < num_args; i++){
 122         /* we seem to hit a limit on number of arguments if doing
 123            short and long flags with arguments -- split on two lines */
 124         if(ISFLAG(args[i]) ||
 125            args[i].short_name == 0 || args[i].long_name == NULL) {
 126             printf(".Op ");
 127
 128             if(args[i].short_name) {
 129                 print_arg(buf, sizeof(buf), 1, 0, args + i, i18n);
 130                 printf("Fl %c%s", args[i].short_name, buf);
 131                 if(args[i].long_name)
 132                     printf(" | ");
 133             }
 134             if(args[i].long_name) {
 135                 print_arg(buf, sizeof(buf), 1, 1, args + i, i18n);
 136                 printf("Fl -%s%s%s",
 137                        args[i].type == arg_negative_flag ? "no-" : "",
 138                        args[i].long_name, buf);
 139             }
 140             printf("\n");
 141         } else {
 142             print_arg(buf, sizeof(buf), 1, 0, args + i, i18n);
 143             printf(".Oo Fl %c%s \\*(Ba Xo\n", args[i].short_name, buf);
 144             print_arg(buf, sizeof(buf), 1, 1, args + i, i18n);
 145             printf(".Fl -%s%s\n.Xc\n.Oc\n", args[i].long_name, buf);
 146         }
 147     /*
 148             if(args[i].type == arg_strings)
 149                 fprintf (stderr, "...");
 150                 */
 151     }
 152     if (extra_string && *extra_string)
 153         printf (".Ar %s\n", extra_string);
 154     printf(".Sh DESCRIPTION\n");
 155     printf("Supported options:\n");
 156     printf(".Bl -tag -width Ds\n");
 157     for(i = 0; i < num_args; i++){
 158         printf(".It Xo\n");
 159         if(args[i].short_name){
 160             printf(".Fl %c", args[i].short_name);
 161             print_arg(buf, sizeof(buf), 1, 0, args + i, i18n);
 162             printf("%s", buf);
 163             if(args[i].long_name)
 164                 printf(" ,");
 165             printf("\n");
 166         }
 167         if(args[i].long_name){
 168             printf(".Fl -%s%s",
 169                    args[i].type == arg_negative_flag ? "no-" : "",
 170                    args[i].long_name);
 171             print_arg(buf, sizeof(buf), 1, 1, args + i, i18n);
 172             printf("%s\n", buf);
 173         }
 174         printf(".Xc\n");
 175         if(args[i].help)
 176             printf("%s\n", args[i].help);
 177     /*
 178             if(args[i].type == arg_strings)
 179                 fprintf (stderr, "...");
 180                 */
 181     }
 182     printf(".El\n");
 183     printf(".\\\".Sh ENVIRONMENT\n");
 184     printf(".\\\".Sh FILES\n");
 185     printf(".\\\".Sh EXAMPLES\n");
 186     printf(".\\\".Sh DIAGNOSTICS\n");
 187     printf(".\\\".Sh SEE ALSO\n");
 188     printf(".\\\".Sh STANDARDS\n");
 189     printf(".\\\".Sh HISTORY\n");
 190     printf(".\\\".Sh AUTHORS\n");
 191     printf(".\\\".Sh BUGS\n");
 192 }
 193
 194 static int
 195 check_column(FILE *f, int col, int len, int columns)
 196 {
 197     if(col + len > columns) {
 198         fprintf(f, "\n");
 199         col = fprintf(f, "  ");
 200     }
 201     return col;
 202 }
 203
 204 static char *
 205 builtin_i18n(const char *str)
 206 {
 207     return rk_UNCONST(str);
 208 }
 209
 210 void ROKEN_LIB_FUNCTION
 211 arg_printusage (struct getargs *args,
 212                 size_t num_args,
 213                 const char *progname,
 214                 const char *extra_string)
 215 {
 216     arg_printusage_i18n(args, num_args, "Usage",
 217                         progname, extra_string, builtin_i18n);
 218 }
 219
 220 void ROKEN_LIB_FUNCTION
 221 arg_printusage_i18n (struct getargs *args,
 222                      size_t num_args,
 223                      const char *usage,
 224                      const char *progname,
 225                      const char *extra_string,
 226                      char *(i18n)(const char *))
 227 {
 228     int i;
 229     size_t max_len = 0;
 230     char buf[128];
 231     int col = 0, columns;
 232     struct winsize ws;
 233
 234     if (progname == NULL)
 235         progname = getprogname();
 236
 237     if (i18n == NULL)
 238         i18n = builtin_i18n;
 239
 240     if(getenv("GETARGMANDOC")){
 241         mandoc_template(args, num_args, progname, extra_string, i18n);
 242         return;
 243     }
 244     if(get_window_size(2, &ws) == 0)
 245         columns = ws.ws_col;
 246     else
 247         columns = 80;
 248     col = 0;
 249     col += fprintf (stderr, "%s: %s", usage, progname);
 250     buf[0] = '\0';
 251     for (i = 0; i < num_args; ++i) {
 252         if(args[i].short_name && ISFLAG(args[i])) {
 253             char s[2];
 254             if(buf[0] == '\0')
 255                 strlcpy(buf, "[-", sizeof(buf));
 256             s[0] = args[i].short_name;
 257             s[1] = '\0';
 258             strlcat(buf, s, sizeof(buf));
 259         }
 260     }
 261     if(buf[0] != '\0') {
 262         strlcat(buf, "]", sizeof(buf));
 263         col = check_column(stderr, col, strlen(buf) + 1, columns);
 264         col += fprintf(stderr, " %s", buf);
 265     }
 266
 267     for (i = 0; i < num_args; ++i) {
 268         size_t len = 0;
 269
 270         if (args[i].long_name) {
 271             buf[0] = '\0';
 272             strlcat(buf, "[--", sizeof(buf));
 273             len += 2;
 274             if(args[i].type == arg_negative_flag) {
 275                 strlcat(buf, "no-", sizeof(buf));
 276                 len += 3;
 277             }
 278             strlcat(buf, args[i].long_name, sizeof(buf));
 279             len += strlen(args[i].long_name);
 280             len += print_arg(buf + strlen(buf), sizeof(buf) - strlen(buf),
 281                              0, 1, &args[i], i18n);
 282             strlcat(buf, "]", sizeof(buf));
 283             if(args[i].type == arg_strings)
 284                 strlcat(buf, "...", sizeof(buf));
 285             col = check_column(stderr, col, strlen(buf) + 1, columns);
 286             col += fprintf(stderr, " %s", buf);
 287         }
 288         if (args[i].short_name && !ISFLAG(args[i])) {
 289             snprintf(buf, sizeof(buf), "[-%c", args[i].short_name);
 290             len += 2;
 291             len += print_arg(buf + strlen(buf), sizeof(buf) - strlen(buf),
 292                              0, 0, &args[i], i18n);
 293             strlcat(buf, "]", sizeof(buf));
 294             if(args[i].type == arg_strings)
 295                 strlcat(buf, "...", sizeof(buf));
 296             col = check_column(stderr, col, strlen(buf) + 1, columns);
 297             col += fprintf(stderr, " %s", buf);
 298         }
 299         if (args[i].long_name && args[i].short_name)
 300             len += 2; /* ", " */
 301         max_len = max(max_len, len);
 302     }
 303     if (extra_string) {
 304         check_column(stderr, col, strlen(extra_string) + 1, columns);
 305         fprintf (stderr, " %s\n", extra_string);
 306     } else
 307         fprintf (stderr, "\n");
 308     for (i = 0; i < num_args; ++i) {
 309         if (args[i].help) {
 310             size_t count = 0;
 311
 312             if (args[i].short_name) {
 313                 count += fprintf (stderr, "-%c", args[i].short_name);
 314                 print_arg (buf, sizeof(buf), 0, 0, &args[i], i18n);
 315                 count += fprintf(stderr, "%s", buf);
 316             }
 317             if (args[i].short_name && args[i].long_name)
 318                 count += fprintf (stderr, ", ");
 319             if (args[i].long_name) {
 320                 count += fprintf (stderr, "--");
 321                 if (args[i].type == arg_negative_flag)
 322                     count += fprintf (stderr, "no-");
 323                 count += fprintf (stderr, "%s", args[i].long_name);
 324                 print_arg (buf, sizeof(buf), 0, 1, &args[i], i18n);
 325                 count += fprintf(stderr, "%s", buf);
 326             }
 327             while(count++ <= max_len)
 328                 putc (' ', stderr);
 329             fprintf (stderr, "%s\n", (*i18n)(args[i].help));
 330         }
 331     }
 332 }
 333
 334 static int
 335 add_string(getarg_strings *s, char *value)
 336 {
 337     char **strings;
 338
 339     strings = realloc(s->strings, (s->num_strings + 1) * sizeof(*s->strings));
 340     if (strings == NULL) {
 341         free(s->strings);
 342         s->strings = NULL;
 343         s->num_strings = 0;
 344         return ENOMEM;
 345     }
 346     s->strings = strings;
 347     s->strings[s->num_strings] = value;
 348     s->num_strings++;
 349     return 0;
 350 }
 351
 352 static int
 353 arg_match_long(struct getargs *args, size_t num_args,
 354                char *argv, int argc, char **rargv, int *goptind)
 355 {
 356     int i;
 357     char *goptarg = NULL;
 358     int negate = 0;
 359     int partial_match = 0;
 360     struct getargs *partial = NULL;
 361     struct getargs *current = NULL;
 362     int argv_len;
 363     char *p;
 364     int p_len;
 365
 366     argv_len = strlen(argv);
 367     p = strchr (argv, '=');
 368     if (p != NULL)
 369         argv_len = p - argv;
 370
 371     for (i = 0; i < num_args; ++i) {
 372         if(args[i].long_name) {
 373             int len = strlen(args[i].long_name);
 374             p = argv;
 375             p_len = argv_len;
 376             negate = 0;
 377
 378             for (;;) {
 379                 if (strncmp (args[i].long_name, p, p_len) == 0) {
 380                     if(p_len == len)
 381                         current = &args[i];
 382                     else {
 383                         ++partial_match;
 384                         partial = &args[i];
 385                     }
 386                     goptarg  = p + p_len;
 387                 } else if (ISFLAG(args[i]) && strncmp (p, "no-", 3) == 0) {
 388                     negate = !negate;
 389                     p += 3;
 390                     p_len -= 3;
 391                     continue;
 392                 }
 393                 break;
 394             }
 395             if (current)
 396                 break;
 397         }
 398     }
 399     if (current == NULL) {
 400         if (partial_match == 1)
 401             current = partial;
 402         else
 403             return ARG_ERR_NO_MATCH;
 404     }
 405
 406     if(*goptarg == '\0'
 407        && !ISFLAG(*current)
 408        && current->type != arg_collect
 409        && current->type != arg_counter)
 410         return ARG_ERR_NO_MATCH;
 411     switch(current->type){
 412     case arg_integer:
 413     {
 414         int tmp;
 415         if(sscanf(goptarg + 1, "%d", &tmp) != 1)
 416             return ARG_ERR_BAD_ARG;
 417         *(int*)current->value = tmp;
 418         return 0;
 419     }
 420     case arg_string:
 421     {
 422         *(char**)current->value = goptarg + 1;
 423         return 0;
 424     }
 425     case arg_strings:
 426     {
 427         return add_string((getarg_strings*)current->value, goptarg + 1);
 428     }
 429     case arg_flag:
 430     case arg_negative_flag:
 431     {
 432         int *flag = current->value;
 433         if(*goptarg == '\0' ||
 434            strcmp(goptarg + 1, "yes") == 0 ||
 435            strcmp(goptarg + 1, "true") == 0){
 436             *flag = !negate;
 437             return 0;
 438         } else if (*goptarg && strcmp(goptarg + 1, "maybe") == 0) {
 439 #ifdef HAVE_RANDOM
 440             *flag = random() & 1;
 441 #else
 442             *flag = rand() & 1;
 443 #endif
 444         } else {
 445             *flag = negate;
 446             return 0;
 447         }
 448         return ARG_ERR_BAD_ARG;
 449     }
 450     case arg_counter :
 451     {
 452         int val;
 453
 454         if (*goptarg == '\0')
 455             val = 1;
 456         else if(sscanf(goptarg + 1, "%d", &val) != 1)
 457             return ARG_ERR_BAD_ARG;
 458         *(int *)current->value += val;
 459         return 0;
 460     }
 461     case arg_double:
 462     {
 463         double tmp;
 464         if(sscanf(goptarg + 1, "%lf", &tmp) != 1)
 465             return ARG_ERR_BAD_ARG;
 466         *(double*)current->value = tmp;
 467         return 0;
 468     }
 469     case arg_collect:{
 470         struct getarg_collect_info *c = current->value;
 471         int o = argv - rargv[*goptind];
 472         return (*c->func)(FALSE, argc, rargv, goptind, &o, c->data);
 473     }
 474
 475     default:
 476         abort ();
 477     }
 478
 479     /* not reached */
 480     return ARG_ERR_NO_MATCH;
 481 }
 482
 483 static int
 484 arg_match_short (struct getargs *args, size_t num_args,
 485                  char *argv, int argc, char **rargv, int *goptind)
 486 {
 487     int j, k;
 488
 489     for(j = 1; j > 0 && j < strlen(rargv[*goptind]); j++) {
 490         for(k = 0; k < num_args; k++) {
 491             char *goptarg;
 492
 493             if(args[k].short_name == 0)
 494                 continue;
 495             if(argv[j] == args[k].short_name) {
 496                 if(args[k].type == arg_flag) {
 497                     *(int*)args[k].value = 1;
 498                     break;
 499                 }
 500                 if(args[k].type == arg_negative_flag) {
 501                     *(int*)args[k].value = 0;
 502                     break;
 503                 }
 504                 if(args[k].type == arg_counter) {
 505                     ++*(int *)args[k].value;
 506                     break;
 507                 }
 508                 if(args[k].type == arg_collect) {
 509                     struct getarg_collect_info *c = args[k].value;
 510
 511                     if((*c->func)(TRUE, argc, rargv, goptind, &j, c->data))
 512                         return ARG_ERR_BAD_ARG;
 513                     break;
 514                 }
 515
 516                 if(argv[j + 1])
 517                     goptarg = &argv[j + 1];
 518                 else {
 519                     ++*goptind;
 520                     goptarg = rargv[*goptind];
 521                 }
 522                 if(goptarg == NULL) {
 523                     --*goptind;
 524                     return ARG_ERR_NO_ARG;
 525                 }
 526                 if(args[k].type == arg_integer) {
 527                     int tmp;
 528                     if(sscanf(goptarg, "%d", &tmp) != 1)
 529                         return ARG_ERR_BAD_ARG;
 530                     *(int*)args[k].value = tmp;
 531                     return 0;
 532                 } else if(args[k].type == arg_string) {
 533                     *(char**)args[k].value = goptarg;
 534                     return 0;
 535                 } else if(args[k].type == arg_strings) {
 536                     return add_string((getarg_strings*)args[k].value, goptarg);
 537                 } else if(args[k].type == arg_double) {
 538                     double tmp;
 539                     if(sscanf(goptarg, "%lf", &tmp) != 1)
 540                         return ARG_ERR_BAD_ARG;
 541                     *(double*)args[k].value = tmp;
 542                     return 0;
 543                 }
 544                 return ARG_ERR_BAD_ARG;
 545             }
 546         }
 547         if (k == num_args)
 548             return ARG_ERR_NO_MATCH;
 549     }
 550     return 0;
 551 }
 552
 553 int ROKEN_LIB_FUNCTION
 554 getarg(struct getargs *args, size_t num_args,
 555        int argc, char **argv, int *goptind)
 556 {
 557     int i;
 558     int ret = 0;
 559
 560 #if defined(HAVE_SRANDOMDEV)
 561     srandomdev();
 562 #elif defined(HAVE_RANDOM)
 563     srandom(time(NULL));
 564 #else
 565     srand (time(NULL));
 566 #endif
 567     (*goptind)++;
 568     for(i = *goptind; i < argc; i++) {
 569         if(argv[i][0] != '-')
 570             break;
 571         if(argv[i][1] == '-'){
 572             if(argv[i][2] == 0){
 573                 i++;
 574                 break;
 575             }
 576             ret = arg_match_long (args, num_args, argv[i] + 2,
 577                                   argc, argv, &i);
 578         } else {
 579             ret = arg_match_short (args, num_args, argv[i],
 580                                    argc, argv, &i);
 581         }
 582         if(ret)
 583             break;
 584     }
 585     *goptind = i;
 586     return ret;
 587 }
 588
 589 void ROKEN_LIB_FUNCTION
 590 free_getarg_strings (getarg_strings *s)
 591 {
 592     free (s->strings);
 593 }
 594
 595 #if TEST
 596 int foo_flag = 2;
 597 int flag1 = 0;
 598 int flag2 = 0;
 599 int bar_int;
 600 char *baz_string;
 601
 602 struct getargs args[] = {
 603     { NULL, '1', arg_flag, &flag1, "one", NULL },
 604     { NULL, '2', arg_flag, &flag2, "two", NULL },
 605     { "foo", 'f', arg_negative_flag, &foo_flag, "foo", NULL },
 606     { "bar", 'b', arg_integer, &bar_int, "bar", "seconds"},
 607     { "baz", 'x', arg_string, &baz_string, "baz", "name" },
 608 };
 609
 610 int main(int argc, char **argv)
 611 {
 612     int goptind = 0;
 613     while(getarg(args, 5, argc, argv, &goptind))
 614         printf("Bad arg: %s\n", argv[goptind]);
 615     printf("flag1 = %d\n", flag1);
 616     printf("flag2 = %d\n", flag2);
 617     printf("foo_flag = %d\n", foo_flag);
 618     printf("bar_int = %d\n", bar_int);
 619     printf("baz_flag = %s\n", baz_string);
 620     arg_printusage (args, 5, argv[0], "nothing here");
 621 }
 622 #endif