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 int pkg_parse_line(void *ptr, char *line, uint mask)
 116 {
 117         pkg_t *pkg = (pkg_t *) ptr;
 118         abstract_pkg_t *ab_pkg = NULL;
 119         conffile_list_t *cl;
 120
 121         /* these flags are a bit hackish... */
 122         static int reading_conffiles = 0, reading_description = 0;
 123         static char *description = NULL;
 124         int ret = 0;
 125
 126         /* Exclude globally masked fields. */
 127         mask |= conf->pfm;
 128
 129         /* Flip the semantics of the mask. */
 130         mask ^= PFM_ALL;
 131
 132         switch (*line) {
 133         case 'A':
 134                 if ((mask & PFM_ARCHITECTURE) && is_field("Architecture", line))
 135                         parse_architecture(pkg, line + strlen("Architecture") + 1);
 136                 else if ((mask & PFM_AUTO_INSTALLED)
 137                            && is_field("Auto-Installed", line)) {
 138                         char *tmp = parse_simple("Auto-Installed", line);
 139                         if (strcmp(tmp, "yes") == 0)
 140                                 pkg->auto_installed = 1;
 141                         free(tmp);
 142                 }
 143                 break;
 144
 145         case 'C':
 146                 if ((mask & PFM_CONFFILES) && is_field("Conffiles", line)) {
 147                         reading_conffiles = 1;
 148                         reading_description = 0;
 149
 150                         cl = xcalloc(1, sizeof(*cl));
 151                         conffile_list_init(cl);
 152                         pkg_set_ptr(pkg, PKG_CONFFILES, cl);
 153
 154                         goto dont_reset_flags;
 155                 } else if ((mask & PFM_CONFLICTS)
 156                            && is_field("Conflicts", line))
 157                         parse_deplist(pkg, CONFLICTS, line + strlen("Conflicts") + 1);
 158                 break;
 159
 160         case 'D':
 161                 if ((mask & PFM_DESCRIPTION) && is_field("Description", line)) {
 162                         description = parse_simple("Description", line);
 163                         reading_conffiles = 0;
 164                         reading_description = 1;
 165                         goto dont_reset_flags;
 166                 } else if ((mask & PFM_DEPENDS) && is_field("Depends", line))
 167                         parse_deplist(pkg, DEPEND, line + strlen("Depends") + 1);
 168                 break;
 169
 170         case 'E':
 171                 if ((mask & PFM_ESSENTIAL) && is_field("Essential", line)) {
 172                         char *tmp = parse_simple("Essential", line);
 173                         if (strcmp(tmp, "yes") == 0)
 174                                 pkg->essential = 1;
 175                         free(tmp);
 176                 }
 177                 break;
 178
 179         case 'F':
 180                 if ((mask & PFM_FILENAME) && is_field("Filename", line))
 181                         pkg_set_string(pkg, PKG_FILENAME, line + strlen("Filename") + 1);
 182                 break;
 183
 184         case 'I':
 185                 if ((mask & PFM_INSTALLED_SIZE)
 186                     && is_field("Installed-Size", line)) {
 187                         pkg_set_int(pkg, PKG_INSTALLED_SIZE, strtoul(line + strlen("Installed-Size") + 1, NULL, 0));
 188                 } else if ((mask & PFM_INSTALLED_TIME)
 189                            && is_field("Installed-Time", line)) {
 190                         pkg_set_int(pkg, PKG_INSTALLED_TIME, strtoul(line + strlen("Installed-Time") + 1, NULL, 0));
 191                 }
 192                 break;
 193
 194         case 'M':
 195                 if ((mask & PFM_MD5SUM) && (is_field("MD5sum:", line) || is_field("MD5Sum:", line)))
 196                         pkg_set_md5(pkg, line + strlen("MD5sum") + 1);
 197                 else if ((mask & PFM_MAINTAINER)
 198                          && is_field("Maintainer", line))
 199                         pkg_set_string(pkg, PKG_MAINTAINER, line + strlen("Maintainer") + 1);
 200                 break;
 201
 202         case 'P':
 203                 if ((mask & PFM_PACKAGE) && is_field("Package", line)) {
 204                         pkg->name = parse_simple("Package", line);
 205                         ab_pkg = abstract_pkg_fetch_by_name(pkg->name);
 206
 207                         if (ab_pkg && (ab_pkg->state_flag & SF_NEED_DETAIL)) {
 208                                 if (!(pkg->state_flag & SF_NEED_DETAIL)) {
 209                                         opkg_msg(DEBUG, "propagating abpkg flag to pkg %s\n", pkg->name);
 210                                         pkg->state_flag |= SF_NEED_DETAIL;
 211                                 }
 212                         }
 213                 }
 214                 else if ((mask & PFM_PRIORITY) && is_field("Priority", line))
 215                         pkg_set_string(pkg, PKG_PRIORITY, line + strlen("Priority") + 1);
 216                 else if ((mask & PFM_PROVIDES) && is_field("Provides", line))
 217                         parse_providelist(pkg, line + strlen("Provides") + 1);
 218                 else if ((mask & PFM_PRE_DEPENDS)
 219                          && is_field("Pre-Depends", line))
 220                         parse_deplist(pkg, PREDEPEND, line + strlen("Pre-Depends") + 1);
 221                 break;
 222
 223         case 'R':
 224                 if ((mask & PFM_RECOMMENDS) && is_field("Recommends", line))
 225                         parse_deplist(pkg, RECOMMEND, line + strlen("Recommends") + 1);
 226                 else if ((mask & PFM_REPLACES) && is_field("Replaces", line))
 227                         parse_replacelist(pkg, line + strlen("Replaces") + 1);
 228                 break;
 229
 230         case 'S':
 231                 if ((mask & PFM_SECTION) && is_field("Section", line))
 232                         pkg_set_string(pkg, PKG_SECTION, line + strlen("Section") + 1);
 233                 else if ((mask & PFM_SHA256SUM) && is_field("SHA256sum", line))
 234                         pkg_set_sha256(pkg, line + strlen("SHA256sum") + 1);
 235                 else if ((mask & PFM_SIZE) && is_field("Size", line)) {
 236                         pkg_set_int(pkg, PKG_SIZE, strtoul(line + strlen("Size") + 1, NULL, 0));
 237                 } else if ((mask & PFM_SOURCE) && is_field("Source", line))
 238                         pkg_set_string(pkg, PKG_SOURCE, line + strlen("Source") + 1);
 239                 else if ((mask & PFM_STATUS) && is_field("Status", line))
 240                         parse_status(pkg, line);
 241                 else if ((mask & PFM_SUGGESTS) && is_field("Suggests", line))
 242                         parse_deplist(pkg, SUGGEST, line + strlen("Suggests") + 1);
 243                 break;
 244
 245         case 'T':
 246                 if ((mask & PFM_TAGS) && is_field("Tags", line))
 247                         pkg_set_string(pkg, PKG_TAGS, line + strlen("Tags") + 1);
 248                 break;
 249
 250         case 'V':
 251                 if ((mask & PFM_VERSION) && is_field("Version", line))
 252                         parse_version(pkg, line);
 253                 break;
 254
 255         case ' ':
 256                 if ((mask & PFM_DESCRIPTION) && reading_description) {
 257                         size_t len = (description ? strlen(description) : 0)
 258                                 + (isatty(1) ? 1 : 0) + strlen(line) + 1;
 259
 260                         description = description ? xrealloc(description, len)
 261                                 : xcalloc(len, 1);
 262
 263                         if (isatty(1))
 264                                 strcat(description, "\n");
 265
 266                         strcat(description, line);
 267                         goto dont_reset_flags;
 268                 } else if ((mask & PFM_CONFFILES) && reading_conffiles) {
 269                         parse_conffiles(pkg, line);
 270                         goto dont_reset_flags;
 271                 }
 272
 273                 /* FALLTHROUGH */
 274         default:
 275                 /* For package lists, signifies end of package. */
 276                 if (line_is_blank(line)) {
 277                         ret = 1;
 278                         break;
 279                 }
 280         }
 281
 282         if (reading_description && description) {
 283                 pkg_set_string(pkg, PKG_DESCRIPTION, description);
 284                 free(description);
 285                 reading_description = 0;
 286                 description = NULL;
 287         }
 288
 289         reading_conffiles = 0;
 290
 291 dont_reset_flags:
 292
 293         return ret;
 294 }
 295
 296 int pkg_parse_from_stream(pkg_t * pkg, FILE * fp, uint mask)
 297 {
 298         int ret;
 299         char *buf;
 300         const size_t len = 4096;
 301
 302         buf = xmalloc(len);
 303         ret =
 304             parse_from_stream_nomalloc(pkg_parse_line, pkg, fp, mask, &buf,
 305                                        len);
 306         free(buf);
 307
 308         if (pkg->name == NULL) {
 309                 /* probably just a blank line */
 310                 ret = 1;
 311         }
 312
 313         return ret;
 314 }