libopkg/pkg_parse.c

   1 /* pkg_parse.c - the opkg package management system
   2
   3    Copyright (C) 2009 Ubiq Technologies <graham.gower@gmail.com>
   4
   5    Steven M. Ayer
   6    Copyright (C) 2002 Compaq Computer Corporation
   7
   8    This program is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU General Public License as
  10    published by the Free Software Foundation; either version 2, or (at
  11    your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful, but
  14    WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    General Public License for more details.
  17 */
  18
  19 #include <stdio.h>
  20 #include <ctype.h>
  21 #include <unistd.h>
  22
  23 #include "pkg.h"
  24 #include "opkg_utils.h"
  25 #include "pkg_parse.h"
  26 #include "pkg_depends.h"
  27 #include "libbb/libbb.h"
  28
  29 #include "file_util.h"
  30 #include "parse_util.h"
  31
  32 static void parse_status(pkg_t * pkg, const char *sstr)
  33 {
  34         char sw_str[64], sf_str[64], ss_str[64];
  35
  36         if (sscanf(sstr, "Status: %63s %63s %63s", sw_str, sf_str, ss_str) != 3) {
  37                 opkg_msg(ERROR, "Failed to parse Status line for %s\n",
  38                          pkg->name);
  39                 return;
  40         }
  41
  42         pkg->state_want = pkg_state_want_from_str(sw_str);
  43         pkg->state_flag |= pkg_state_flag_from_str(sf_str);
  44         pkg->state_status = pkg_state_status_from_str(ss_str);
  45 }
  46
  47 static void parse_conffiles(pkg_t * pkg, const char *cstr)
  48 {
  49         conffile_list_t *cl;
  50         char file_name[1024], md5sum[85];
  51
  52         if (sscanf(cstr, "%1023s %84s", file_name, md5sum) != 2) {
  53                 opkg_msg(ERROR, "Failed to parse Conffiles line for %s\n",
  54                          pkg->name);
  55                 return;
  56         }
  57
  58         cl = pkg_get_ptr(pkg, PKG_CONFFILES);
  59
  60         if (cl)
  61                 conffile_list_append(cl, file_name, md5sum);
  62 }
  63
  64 int parse_version(pkg_t * pkg, const char *vstr)
  65 {
  66         char *colon, *dup, *rev;
  67
  68         if (strncmp(vstr, "Version:", 8) == 0)
  69                 vstr += 8;
  70
  71         while (*vstr && isspace(*vstr))
  72                 vstr++;
  73
  74         colon = strchr(vstr, ':');
  75         if (colon) {
  76                 errno = 0;
  77                 pkg_set_int(pkg, PKG_EPOCH, strtoul(vstr, NULL, 10));
  78                 if (errno) {
  79                         opkg_perror(ERROR, "%s: invalid epoch", pkg->name);
  80                 }
  81                 vstr = ++colon;
  82         }
  83
  84
  85         dup = xstrdup(vstr);
  86         rev = strrchr(dup, '-');
  87
  88         if (rev) {
  89                 *rev++ = '\0';
  90                 pkg_set_string(pkg, PKG_REVISION, rev);
  91         }
  92
  93         pkg_set_string(pkg, PKG_VERSION, dup);
  94         free(dup);
  95
  96         return 0;
  97 }
  98
  99 static char *parse_architecture(pkg_t *pkg, const char *str)
 100 {
 101         const char *s = str;
 102         const char *e;
 103
 104         while (isspace(*s))
 105                 s++;
 106
 107         e = s + strlen(s);
 108
 109         while (e > s && isspace(*e))
 110                 e--;
 111
 112         return pkg_set_architecture(pkg, s, e - s);
 113 }
 114
 115 static void parse_alternatives(pkg_t *pkg, char *list)
 116 {
 117         char *item, *tok;
 118         struct pkg_alternatives *pkg_alts;
 119         struct pkg_alternative **alts;
 120         int nalts;
 121
 122         pkg_alts = pkg_get_ptr(pkg, PKG_ALTERNATIVES);
 123         if (!pkg_alts) {
 124                 nalts = 0;
 125                 alts = NULL;
 126         } else {
 127                 nalts = pkg_alts->nalts;
 128                 alts = pkg_alts->alts;
 129         }
 130
 131         for (item = strtok_r(list, ",", &tok);
 132                         item;
 133                         item = strtok_r(NULL, ",", &tok)) {
 134                 enum pkg_alternative_field i;
 135                 char *val, *tok1;
 136                 /* the assignment was intended to quash the -Wmaybe-uninitialized warnings */
 137                 int prio = prio;
 138                 char *path = path, *altpath = altpath;
 139
 140                 for (i = PAF_PRIO, val = strtok_r(item, ":", &tok1);
 141                                 val && i < __PAF_MAX;
 142                                 val = strtok_r(NULL, ":", &tok1), i++) {
 143                         switch (i) {
 144                                 case PAF_PRIO:
 145                                         prio = atoi(val);
 146                                         break;
 147                                 case PAF_PATH:
 148                                         path = val;
 149                                         break;
 150                                 case PAF_ALTPATH:
 151                                         altpath = val;
 152                                         break;
 153                                 default:
 154                                         break;
 155                         }
 156                 }
 157                 if (!val && i == __PAF_MAX) {
 158                         char *_path, *_altpath;
 159                         struct pkg_alternative *alt;
 160
 161                         /*
 162                          * - path must be absolute
 163                          * - altpath must be non-empty
 164                          */
 165                         if (path[0] != '/' || !altpath[0])
 166                                 continue;
 167
 168                         alt = calloc_a(sizeof(*alt),
 169                                         &_path, strlen(path) + 1,
 170                                         &_altpath, strlen(altpath) + 1);
 171                         if (!alt)
 172                                 continue;
 173                         strcpy(_path, path);
 174                         strcpy(_altpath, altpath);
 175                         alt->prio = prio;
 176                         alt->path = _path;
 177                         alt->altpath = _altpath;
 178                         alts = xrealloc(alts, sizeof(*alts) * (nalts + 1));
 179                         alts[nalts++] = alt;
 180                 }
 181         }
 182
 183         if (nalts > 0) {
 184                 if (!pkg_alts)
 185                         pkg_alts = xmalloc(sizeof(*pkg_alts));
 186                 pkg_alts->nalts = nalts;
 187                 pkg_alts->alts = alts;
 188                 pkg_set_ptr(pkg, PKG_ALTERNATIVES, pkg_alts);
 189         }
 190 }
 191
 192 int pkg_parse_line(void *ptr, char *line, uint mask)
 193 {
 194         pkg_t *pkg = (pkg_t *) ptr;
 195         abstract_pkg_t *ab_pkg = NULL;
 196         conffile_list_t *cl;
 197
 198         /* these flags are a bit hackish... */
 199         static int reading_conffiles = 0, reading_description = 0;
 200         static char *description = NULL;
 201         int ret = 0;
 202
 203         /* Exclude globally masked fields. */
 204         mask |= conf->pfm;
 205
 206         /* Flip the semantics of the mask. */
 207         mask ^= PFM_ALL;
 208
 209         switch (*line) {
 210         case 'A':
 211                 if ((mask & PFM_ALTERNATIVES) && is_field("Alternatives", line))
 212                         parse_alternatives(pkg, line + strlen("Alternatives") + 1);
 213                 else if ((mask & PFM_ARCHITECTURE) && is_field("Architecture", line))
 214                         parse_architecture(pkg, line + strlen("Architecture") + 1);
 215                 else if ((mask & PFM_AUTO_INSTALLED)
 216                            && is_field("Auto-Installed", line)) {
 217                         char *tmp = parse_simple("Auto-Installed", line);
 218                         if (strcmp(tmp, "yes") == 0)
 219                                 pkg->auto_installed = 1;
 220                         free(tmp);
 221                 }
 222                 break;
 223
 224         case 'C':
 225                 if ((mask & PFM_CONFFILES) && is_field("Conffiles", line)) {
 226                         reading_conffiles = 1;
 227                         reading_description = 0;
 228
 229                         cl = xcalloc(1, sizeof(*cl));
 230                         conffile_list_init(cl);
 231                         pkg_set_ptr(pkg, PKG_CONFFILES, cl);
 232
 233                         goto dont_reset_flags;
 234                 } else if ((mask & PFM_CONFLICTS)
 235                            && is_field("Conflicts", line))
 236                         parse_deplist(pkg, CONFLICTS, line + strlen("Conflicts") + 1);
 237                 break;
 238
 239         case 'D':
 240                 if ((mask & PFM_DESCRIPTION) && is_field("Description", line)) {
 241                         description = parse_simple("Description", line);
 242                         reading_conffiles = 0;
 243                         reading_description = 1;
 244                         goto dont_reset_flags;
 245                 } else if ((mask & PFM_DEPENDS) && is_field("Depends", line))
 246                         parse_deplist(pkg, DEPEND, line + strlen("Depends") + 1);
 247                 break;
 248
 249         case 'E':
 250                 if ((mask & PFM_ESSENTIAL) && is_field("Essential", line)) {
 251                         char *tmp = parse_simple("Essential", line);
 252                         if (strcmp(tmp, "yes") == 0)
 253                                 pkg->essential = 1;
 254                         free(tmp);
 255                 }
 256                 break;
 257
 258         case 'F':
 259                 if ((mask & PFM_FILENAME) && is_field("Filename", line))
 260                         pkg_set_string(pkg, PKG_FILENAME, line + strlen("Filename") + 1);
 261                 break;
 262
 263         case 'I':
 264                 if ((mask & PFM_INSTALLED_SIZE)
 265                     && is_field("Installed-Size", line)) {
 266                         pkg_set_int(pkg, PKG_INSTALLED_SIZE, strtoul(line + strlen("Installed-Size") + 1, NULL, 0));
 267                 } else if ((mask & PFM_INSTALLED_TIME)
 268                            && is_field("Installed-Time", line)) {
 269                         pkg_set_int(pkg, PKG_INSTALLED_TIME, strtoul(line + strlen("Installed-Time") + 1, NULL, 0));
 270                 }
 271                 break;
 272
 273         case 'M':
 274                 if ((mask & PFM_MD5SUM) && (is_field("MD5sum:", line) || is_field("MD5Sum:", line)))
 275                         pkg_set_md5(pkg, line + strlen("MD5sum") + 1);
 276                 else if ((mask & PFM_MAINTAINER)
 277                          && is_field("Maintainer", line))
 278                         pkg_set_string(pkg, PKG_MAINTAINER, line + strlen("Maintainer") + 1);
 279                 break;
 280
 281         case 'P':
 282                 if ((mask & PFM_PACKAGE) && is_field("Package", line)) {
 283                         pkg->name = parse_simple("Package", line);
 284                         ab_pkg = abstract_pkg_fetch_by_name(pkg->name);
 285
 286                         if (ab_pkg && (ab_pkg->state_flag & SF_NEED_DETAIL)) {
 287                                 if (!(pkg->state_flag & SF_NEED_DETAIL)) {
 288                                         opkg_msg(DEBUG, "propagating abpkg flag to pkg %s\n", pkg->name);
 289                                         pkg->state_flag |= SF_NEED_DETAIL;
 290                                 }
 291                         }
 292                 }
 293                 else if ((mask & PFM_PRIORITY) && is_field("Priority", line))
 294                         pkg_set_string(pkg, PKG_PRIORITY, line + strlen("Priority") + 1);
 295                 else if ((mask & PFM_PROVIDES) && is_field("Provides", line))
 296                         parse_providelist(pkg, line + strlen("Provides") + 1);
 297                 else if ((mask & PFM_PRE_DEPENDS)
 298                          && is_field("Pre-Depends", line))
 299                         parse_deplist(pkg, PREDEPEND, line + strlen("Pre-Depends") + 1);
 300                 break;
 301
 302         case 'R':
 303                 if ((mask & PFM_RECOMMENDS) && is_field("Recommends", line))
 304                         parse_deplist(pkg, RECOMMEND, line + strlen("Recommends") + 1);
 305                 else if ((mask & PFM_REPLACES) && is_field("Replaces", line))
 306                         parse_replacelist(pkg, line + strlen("Replaces") + 1);
 307                 break;
 308
 309         case 'S':
 310                 if ((mask & PFM_SECTION) && is_field("Section", line))
 311                         pkg_set_string(pkg, PKG_SECTION, line + strlen("Section") + 1);
 312                 else if ((mask & PFM_SHA256SUM) && is_field("SHA256sum", line))
 313                         pkg_set_sha256(pkg, line + strlen("SHA256sum") + 1);
 314                 else if ((mask & PFM_SIZE) && is_field("Size", line)) {
 315                         pkg_set_int(pkg, PKG_SIZE, strtoul(line + strlen("Size") + 1, NULL, 0));
 316                 } else if ((mask & PFM_SOURCE) && is_field("Source", line))
 317                         pkg_set_string(pkg, PKG_SOURCE, line + strlen("Source") + 1);
 318                 else if ((mask & PFM_STATUS) && is_field("Status", line))
 319                         parse_status(pkg, line);
 320                 else if ((mask & PFM_SUGGESTS) && is_field("Suggests", line))
 321                         parse_deplist(pkg, SUGGEST, line + strlen("Suggests") + 1);
 322                 break;
 323
 324         case 'T':
 325                 if ((mask & PFM_TAGS) && is_field("Tags", line))
 326                         pkg_set_string(pkg, PKG_TAGS, line + strlen("Tags") + 1);
 327                 break;
 328
 329         case 'V':
 330                 if ((mask & PFM_VERSION) && is_field("Version", line))
 331                         parse_version(pkg, line);
 332                 break;
 333
 334         case ' ':
 335                 if ((mask & PFM_DESCRIPTION) && reading_description) {
 336                         size_t len = (description ? strlen(description) : 0)
 337                                 + (isatty(1) ? 1 : 0) + strlen(line) + 1;
 338
 339                         description = description ? xrealloc(description, len)
 340                                 : xcalloc(len, 1);
 341
 342                         if (isatty(1))
 343                                 strcat(description, "\n");
 344
 345                         strcat(description, line);
 346                         goto dont_reset_flags;
 347                 } else if ((mask & PFM_CONFFILES) && reading_conffiles) {
 348                         parse_conffiles(pkg, line);
 349                         goto dont_reset_flags;
 350                 }
 351
 352                 /* FALLTHROUGH */
 353         default:
 354                 /* For package lists, signifies end of package. */
 355                 if (line_is_blank(line)) {
 356                         ret = 1;
 357                         break;
 358                 }
 359         }
 360
 361         if (reading_description && description) {
 362                 pkg_set_string(pkg, PKG_DESCRIPTION, description);
 363                 free(description);
 364                 reading_description = 0;
 365                 description = NULL;
 366         }
 367
 368         reading_conffiles = 0;
 369
 370 dont_reset_flags:
 371
 372         return ret;
 373 }
 374
 375 int pkg_parse_from_stream(pkg_t * pkg, FILE * fp, uint mask)
 376 {
 377         int ret;
 378         char *buf;
 379         const size_t len = 4096;
 380
 381         buf = xmalloc(len);
 382         ret =
 383             parse_from_stream_nomalloc(pkg_parse_line, pkg, fp, mask, &buf,
 384                                        len);
 385         free(buf);
 386
 387         if (pkg->name == NULL) {
 388                 /* probably just a blank line */
 389                 ret = 1;
 390         }
 391
 392         return ret;
 393 }