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 "config.h"
  20
  21 #include <stdio.h>
  22 #include <ctype.h>
  23 #include <unistd.h>
  24
  25 #include "pkg.h"
  26 #include "opkg_utils.h"
  27 #include "pkg_parse.h"
  28 #include "libbb/libbb.h"
  29
  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         char file_name[1024], md5sum[85];
  50
  51         if (sscanf(cstr, "%1023s %84s", file_name, md5sum) != 2) {
  52                 opkg_msg(ERROR, "Failed to parse Conffiles line for %s\n",
  53                          pkg->name);
  54                 return;
  55         }
  56
  57         conffile_list_append(&pkg->conffiles, file_name, md5sum);
  58 }
  59
  60 int parse_version(pkg_t * pkg, const char *vstr)
  61 {
  62         char *colon, *rev;
  63
  64         if (strncmp(vstr, "Version:", 8) == 0)
  65                 vstr += 8;
  66
  67         while (*vstr && isspace(*vstr))
  68                 vstr++;
  69
  70         colon = strchr(vstr, ':');
  71         if (colon) {
  72                 errno = 0;
  73                 pkg_set_int(pkg, PKG_EPOCH, strtoul(vstr, NULL, 10));
  74                 if (errno) {
  75                         opkg_perror(ERROR, "%s: invalid epoch", pkg->name);
  76                 }
  77                 vstr = ++colon;
  78         }
  79
  80         rev = strrchr(pkg_set_string(pkg, PKG_VERSION, vstr), '-');
  81
  82         if (rev) {
  83                 *rev++ = '\0';
  84                 pkg_set_ptr(pkg, PKG_REVISION, rev);
  85         }
  86
  87         return 0;
  88 }
  89
  90 static int get_arch_priority(const char *arch)
  91 {
  92         nv_pair_list_elt_t *l;
  93
  94         list_for_each_entry(l, &conf->arch_list.head, node) {
  95                 nv_pair_t *nv = (nv_pair_t *) l->data;
  96                 if (strcmp(nv->name, arch) == 0)
  97                         return strtol(nv->value, NULL, 0);
  98         }
  99         return 0;
 100 }
 101
 102 int pkg_parse_line(void *ptr, const char *line, uint mask)
 103 {
 104         pkg_t *pkg = (pkg_t *) ptr;
 105
 106         /* these flags are a bit hackish... */
 107         static int reading_conffiles = 0, reading_description = 0;
 108         static char *description = NULL;
 109         int ret = 0;
 110
 111         /* Exclude globally masked fields. */
 112         mask |= conf->pfm;
 113
 114         /* Flip the semantics of the mask. */
 115         mask ^= PFM_ALL;
 116
 117         switch (*line) {
 118         case 'A':
 119                 if ((mask & PFM_ARCHITECTURE) && is_field("Architecture", line)) {
 120                         pkg->arch_priority = get_arch_priority(
 121                                 pkg_set_string(pkg, PKG_ARCHITECTURE, line + strlen("Architecture") + 1));
 122
 123                 } else if ((mask & PFM_AUTO_INSTALLED)
 124                            && is_field("Auto-Installed", line)) {
 125                         char *tmp = parse_simple("Auto-Installed", line);
 126                         if (strcmp(tmp, "yes") == 0)
 127                                 pkg->auto_installed = 1;
 128                         free(tmp);
 129                 }
 130                 break;
 131
 132         case 'C':
 133                 if ((mask & PFM_CONFFILES) && is_field("Conffiles", line)) {
 134                         reading_conffiles = 1;
 135                         reading_description = 0;
 136                         goto dont_reset_flags;
 137                 } else if ((mask & PFM_CONFLICTS)
 138                            && is_field("Conflicts", line))
 139                         pkg->conflicts_str =
 140                             parse_list(line, &pkg->conflicts_count, ',', 0);
 141                 break;
 142
 143         case 'D':
 144                 if ((mask & PFM_DESCRIPTION) && is_field("Description", line)) {
 145                         description = parse_simple("Description", line);
 146                         reading_conffiles = 0;
 147                         reading_description = 1;
 148                         goto dont_reset_flags;
 149                 } else if ((mask & PFM_DEPENDS) && is_field("Depends", line))
 150                         pkg->depends_str =
 151                             parse_list(line, &pkg->depends_count, ',', 0);
 152                 break;
 153
 154         case 'E':
 155                 if ((mask & PFM_ESSENTIAL) && is_field("Essential", line)) {
 156                         char *tmp = parse_simple("Essential", line);
 157                         if (strcmp(tmp, "yes") == 0)
 158                                 pkg->essential = 1;
 159                         free(tmp);
 160                 }
 161                 break;
 162
 163         case 'F':
 164                 if ((mask & PFM_FILENAME) && is_field("Filename", line))
 165                         pkg_set_string(pkg, PKG_FILENAME, line + strlen("Filename") + 1);
 166                 break;
 167
 168         case 'I':
 169                 if ((mask & PFM_INSTALLED_SIZE)
 170                     && is_field("Installed-Size", line)) {
 171                         pkg_set_int(pkg, PKG_INSTALLED_SIZE, strtoul(line + strlen("Installed-Size") + 1, NULL, 0));
 172                 } else if ((mask & PFM_INSTALLED_TIME)
 173                            && is_field("Installed-Time", line)) {
 174                         pkg_set_int(pkg, PKG_INSTALLED_TIME, strtoul(line + strlen("Installed-Time") + 1, NULL, 0));
 175                 }
 176                 break;
 177
 178         case 'M':
 179                 if ((mask & PFM_MD5SUM) && is_field("MD5sum:", line))
 180                         pkg_set_string(pkg, PKG_MD5SUM, line + strlen("MD5sum") + 1);
 181                 /* The old opkg wrote out status files with the wrong
 182                  * case for MD5sum, let's parse it either way */
 183                 else if ((mask & PFM_MD5SUM) && is_field("MD5Sum:", line))
 184                         pkg_set_string(pkg, PKG_MD5SUM, line + strlen("MD5Sum") + 1);
 185                 else if ((mask & PFM_MAINTAINER)
 186                          && is_field("Maintainer", line))
 187                         pkg_set_string(pkg, PKG_MAINTAINER, line + strlen("Maintainer") + 1);
 188                 break;
 189
 190         case 'P':
 191                 if ((mask & PFM_PACKAGE) && is_field("Package", line))
 192                         pkg->name = parse_simple("Package", line);
 193                 else if ((mask & PFM_PRIORITY) && is_field("Priority", line))
 194                         pkg_set_string(pkg, PKG_PRIORITY, line + strlen("Priority") + 1);
 195                 else if ((mask & PFM_PROVIDES) && is_field("Provides", line))
 196                         pkg->provides_str =
 197                             parse_list(line, &pkg->provides_count, ',', 0);
 198                 else if ((mask & PFM_PRE_DEPENDS)
 199                          && is_field("Pre-Depends", line))
 200                         pkg->pre_depends_str =
 201                             parse_list(line, &pkg->pre_depends_count, ',', 0);
 202                 break;
 203
 204         case 'R':
 205                 if ((mask & PFM_RECOMMENDS) && is_field("Recommends", line))
 206                         pkg->recommends_str =
 207                             parse_list(line, &pkg->recommends_count, ',', 0);
 208                 else if ((mask & PFM_REPLACES) && is_field("Replaces", line))
 209                         pkg->replaces_str =
 210                             parse_list(line, &pkg->replaces_count, ',', 0);
 211
 212                 break;
 213
 214         case 'S':
 215                 if ((mask & PFM_SECTION) && is_field("Section", line))
 216                         pkg_set_string(pkg, PKG_SECTION, line + strlen("Section") + 1);
 217 #ifdef HAVE_SHA256
 218                 else if ((mask & PFM_SHA256SUM) && is_field("SHA256sum", line))
 219                         pkg_set_string(pkg, PKG_SHA256SUM, line + strlen("SHA256sum") + 1);
 220 #endif
 221                 else if ((mask & PFM_SIZE) && is_field("Size", line)) {
 222                         pkg_set_int(pkg, PKG_SIZE, strtoul(line + strlen("Size") + 1, NULL, 0));
 223                 } else if ((mask & PFM_SOURCE) && is_field("Source", line))
 224                         pkg_set_string(pkg, PKG_SOURCE, line + strlen("Source") + 1);
 225                 else if ((mask & PFM_STATUS) && is_field("Status", line))
 226                         parse_status(pkg, line);
 227                 else if ((mask & PFM_SUGGESTS) && is_field("Suggests", line))
 228                         pkg->suggests_str =
 229                             parse_list(line, &pkg->suggests_count, ',', 0);
 230                 break;
 231
 232         case 'T':
 233                 if ((mask & PFM_TAGS) && is_field("Tags", line))
 234                         pkg_set_string(pkg, PKG_TAGS, line + strlen("Tags") + 1);
 235                 break;
 236
 237         case 'V':
 238                 if ((mask & PFM_VERSION) && is_field("Version", line))
 239                         parse_version(pkg, line);
 240                 break;
 241
 242         case ' ':
 243                 if ((mask & PFM_DESCRIPTION) && reading_description) {
 244                         if (isatty(1)) {
 245                                 description = xrealloc(description,
 246                                                             strlen(description)
 247                                                             + 1 + strlen(line) +
 248                                                             1);
 249                                 strcat(description, "\n");
 250                         } else {
 251                                 description = xrealloc(description,
 252                                                             strlen(description)
 253                                                             + 1 + strlen(line));
 254                         }
 255                         strcat(description, (line));
 256                         goto dont_reset_flags;
 257                 } else if ((mask & PFM_CONFFILES) && reading_conffiles) {
 258                         parse_conffiles(pkg, line);
 259                         goto dont_reset_flags;
 260                 }
 261
 262                 /* FALLTHROUGH */
 263         default:
 264                 /* For package lists, signifies end of package. */
 265                 if (line_is_blank(line)) {
 266                         ret = 1;
 267                         break;
 268                 }
 269         }
 270
 271         if (reading_description && description) {
 272                 pkg_set_string(pkg, PKG_DESCRIPTION, description);
 273                 free(description);
 274                 reading_description = 0;
 275                 description = NULL;
 276         }
 277
 278         reading_conffiles = 0;
 279
 280 dont_reset_flags:
 281
 282         return ret;
 283 }
 284
 285 int pkg_parse_from_stream(pkg_t * pkg, FILE * fp, uint mask)
 286 {
 287         int ret;
 288         char *buf;
 289         const size_t len = 4096;
 290
 291         buf = xmalloc(len);
 292         ret =
 293             parse_from_stream_nomalloc(pkg_parse_line, pkg, fp, mask, &buf,
 294                                        len);
 295         free(buf);
 296
 297         if (pkg->name == NULL) {
 298                 /* probably just a blank line */
 299                 ret = 1;
 300         }
 301
 302         return ret;
 303 }