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
  33 parse_status(pkg_t *pkg, const char *sstr)
  34 {
  35         char sw_str[64], sf_str[64], ss_str[64];
  36
  37         if (sscanf(sstr, "Status: %63s %63s %63s",
  38                                 sw_str, sf_str, ss_str) != 3) {
  39                 opkg_msg(ERROR, "Failed to parse Status line for %s\n",
  40                                 pkg->name);
  41                 return;
  42         }
  43
  44         pkg->state_want = pkg_state_want_from_str(sw_str);
  45         pkg->state_flag = pkg_state_flag_from_str(sf_str);
  46         pkg->state_status = pkg_state_status_from_str(ss_str);
  47 }
  48
  49 static void
  50 parse_conffiles(pkg_t *pkg, const char *cstr)
  51 {
  52         char file_name[1024], md5sum[35];
  53
  54         if (sscanf(cstr, "%1023s %34s", file_name, md5sum) != 2) {
  55                 opkg_msg(ERROR, "Failed to parse Conffiles line for %s\n",
  56                                 pkg->name);
  57                 return;
  58         }
  59
  60         conffile_list_append(&pkg->conffiles, file_name, md5sum);
  61 }
  62
  63 int
  64 parse_version(pkg_t *pkg, const char *vstr)
  65 {
  66         char *colon;
  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->epoch = strtoul(vstr, NULL, 10);
  78                 if (errno) {
  79                         opkg_perror(ERROR, "%s: invalid epoch", pkg->name);
  80                 }
  81                 vstr = ++colon;
  82         } else {
  83                 pkg->epoch= 0;
  84         }
  85
  86         pkg->version = xstrdup(vstr);
  87         pkg->revision = strrchr(pkg->version,'-');
  88
  89         if (pkg->revision)
  90                 *pkg->revision++ = '\0';
  91
  92         return 0;
  93 }
  94
  95 static int
  96 get_arch_priority(const char *arch)
  97 {
  98         nv_pair_list_elt_t *l;
  99
 100         list_for_each_entry(l , &conf->arch_list.head, node) {
 101                 nv_pair_t *nv = (nv_pair_t *)l->data;
 102                 if (strcmp(nv->name, arch) == 0)
 103                         return strtol(nv->value, NULL, 0);
 104         }
 105         return 0;
 106 }
 107
 108 int
 109 pkg_parse_line(void *ptr, const char *line, uint mask)
 110 {
 111         pkg_t *pkg = (pkg_t *) ptr;
 112
 113         /* these flags are a bit hackish... */
 114         static int reading_conffiles = 0, reading_description = 0;
 115         int ret = 0;
 116
 117         /* Exclude globally masked fields. */
 118         mask |= conf->pfm;
 119
 120         /* Flip the semantics of the mask. */
 121         mask ^= PFM_ALL;
 122
 123         switch (*line) {
 124         case 'A':
 125                 if ((mask & PFM_ARCHITECTURE ) && is_field("Architecture", line)) {
 126                         pkg->architecture = parse_simple("Architecture", line);
 127                         pkg->arch_priority = get_arch_priority(pkg->architecture);
 128                 } else if ((mask & PFM_AUTO_INSTALLED) && is_field("Auto-Installed", line)) {
 129                         char *tmp = parse_simple("Auto-Installed", line);
 130                         if (strcmp(tmp, "yes") == 0)
 131                             pkg->auto_installed = 1;
 132                         free(tmp);
 133                 }
 134                 break;
 135
 136         case 'C':
 137                 if ((mask & PFM_CONFFILES) && is_field("Conffiles", line)) {
 138                         reading_conffiles = 1;
 139                         reading_description = 0;
 140                         goto dont_reset_flags;
 141                 }
 142                 else if ((mask & PFM_CONFLICTS) && is_field("Conflicts", line))
 143                         pkg->conflicts_str = parse_list(line, &pkg->conflicts_count, ',', 0);
 144                 break;
 145
 146         case 'D':
 147                 if ((mask & PFM_DESCRIPTION) && is_field("Description", line)) {
 148                         pkg->description = parse_simple("Description", line);
 149                         reading_conffiles = 0;
 150                         reading_description = 1;
 151                         goto dont_reset_flags;
 152                 } else if ((mask & PFM_DEPENDS) && is_field("Depends", line))
 153                         pkg->depends_str = parse_list(line, &pkg->depends_count, ',', 0);
 154                 break;
 155
 156         case 'E':
 157                 if((mask & PFM_ESSENTIAL) && is_field("Essential", line)) {
 158                         char *tmp = parse_simple("Essential", line);
 159                         if (strcmp(tmp, "yes") == 0)
 160                                 pkg->essential = 1;
 161                         free(tmp);
 162                 }
 163                 break;
 164
 165         case 'F':
 166                 if((mask & PFM_FILENAME) && is_field("Filename", line))
 167                         pkg->filename = parse_simple("Filename", line);
 168                 break;
 169
 170         case 'I':
 171                 if ((mask & PFM_INSTALLED_SIZE) && is_field("Installed-Size", line)) {
 172                         char *tmp = parse_simple("Installed-Size", line);
 173                         pkg->installed_size = strtoul(tmp, NULL, 0);
 174                         free (tmp);
 175                 } else if ((mask & PFM_INSTALLED_TIME) && is_field("Installed-Time", line)) {
 176                         char *tmp = parse_simple("Installed-Time", line);
 177                         pkg->installed_time = strtoul(tmp, NULL, 0);
 178                         free (tmp);
 179                 }
 180                 break;
 181
 182         case 'M':
 183                 if ((mask & PFM_MD5SUM) && is_field("MD5sum:", line))
 184                         pkg->md5sum = parse_simple("MD5sum", line);
 185                         /* The old opkg wrote out status files with the wrong
 186                         * case for MD5sum, let's parse it either way */
 187                 else if ((mask & PFM_MD5SUM) && is_field("MD5Sum:", line))
 188                         pkg->md5sum = parse_simple("MD5Sum", line);
 189                 else if((mask & PFM_MAINTAINER) && is_field("Maintainer", line))
 190                         pkg->maintainer = parse_simple("Maintainer", line);
 191                 break;
 192
 193         case 'P':
 194                 if ((mask & PFM_PACKAGE) && is_field("Package", line))
 195                         pkg->name = parse_simple("Package", line);
 196                 else if ((mask & PFM_PRIORITY) && is_field("Priority", line))
 197                         pkg->priority = parse_simple("Priority", line);
 198                 else if ((mask & PFM_PROVIDES) && is_field("Provides", line))
 199                         pkg->provides_str = parse_list(line, &pkg->provides_count, ',', 0);
 200                 else if ((mask & PFM_PRE_DEPENDS) && is_field("Pre-Depends", line))
 201                         pkg->pre_depends_str = 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 = parse_list(line, &pkg->recommends_count, ',', 0);
 207                 else if ((mask & PFM_REPLACES) && is_field("Replaces", line))
 208                         pkg->replaces_str = parse_list(line, &pkg->replaces_count, ',', 0);
 209
 210                 break;
 211
 212         case 'S':
 213                 if ((mask & PFM_SECTION) && is_field("Section", line))
 214                         pkg->section = parse_simple("Section", line);
 215 #ifdef HAVE_SHA256
 216                 else if ((mask & PFM_SHA256SUM) && is_field("SHA256sum", line))
 217                         pkg->sha256sum = parse_simple("SHA256sum", line);
 218 #endif
 219                 else if ((mask & PFM_SIZE) && is_field("Size", line)) {
 220                         char *tmp = parse_simple("Size", line);
 221                         pkg->size = strtoul(tmp, NULL, 0);
 222                         free (tmp);
 223                 } else if ((mask & PFM_SOURCE) && is_field("Source", line))
 224                         pkg->source = parse_simple("Source", line);
 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 = parse_list(line, &pkg->suggests_count, ',', 0);
 229                 break;
 230
 231         case 'T':
 232                 if ((mask & PFM_TAGS) && is_field("Tags", line))
 233                         pkg->tags = parse_simple("Tags", line);
 234                 break;
 235
 236         case 'V':
 237                 if ((mask & PFM_VERSION) && is_field("Version", line))
 238                         parse_version(pkg, line);
 239                 break;
 240
 241         case ' ':
 242                 if ((mask & PFM_DESCRIPTION) && reading_description) {
 243                         if (isatty(1)) {
 244                                 pkg->description = xrealloc(pkg->description,
 245                                                         strlen(pkg->description)
 246                                                         + 1 + strlen(line) + 1);
 247                                 strcat(pkg->description, "\n");
 248                         } else {
 249                                 pkg->description = xrealloc(pkg->description,
 250                                                         strlen(pkg->description)
 251                                                         + 1 + strlen(line));
 252                         }
 253                         strcat(pkg->description, (line));
 254                         goto dont_reset_flags;
 255                 } else if ((mask & PFM_CONFFILES) && reading_conffiles) {
 256                         parse_conffiles(pkg, line);
 257                         goto dont_reset_flags;
 258                 }
 259
 260                 /* FALLTHROUGH */
 261         default:
 262                 /* For package lists, signifies end of package. */
 263                 if(line_is_blank(line)) {
 264                         ret = 1;
 265                         break;
 266                 }
 267         }
 268
 269         reading_description = 0;
 270         reading_conffiles = 0;
 271
 272 dont_reset_flags:
 273
 274         return ret;
 275 }
 276
 277 int
 278 pkg_parse_from_stream(pkg_t *pkg, FILE *fp, uint mask)
 279 {
 280         int ret;
 281         char *buf;
 282         const size_t len = 4096;
 283
 284         buf = xmalloc(len);
 285         ret = parse_from_stream_nomalloc(pkg_parse_line, pkg, fp, mask, &buf, len);
 286         free(buf);
 287
 288         if (pkg->name == NULL) {
 289                 /* probably just a blank line */
 290                 ret = 1;
 291         }
 292
 293         return ret;
 294 }