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, *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         rev = strrchr(vstr, '-');
  85
  86         if (rev) {
  87                 pkg_set_string(pkg, PKG_REVISION, rev + 1);
  88                 pkg_set_raw(pkg, PKG_VERSION, vstr, rev - vstr - 1);
  89         } else {
  90                 pkg_set_string(pkg, PKG_VERSION, vstr);
  91         }
  92
  93         return 0;
  94 }
  95
  96 static char *parse_architecture(pkg_t *pkg, const char *str)
  97 {
  98         const char *s = str;
  99         const char *e;
 100
 101         while (isspace(*s))
 102                 s++;
 103
 104         e = s + strlen(s);
 105
 106         while (e > s && isspace(*e))
 107                 e--;
 108
 109         return pkg_set_architecture(pkg, s, e - s);
 110 }
 111
 112 int pkg_parse_line(void *ptr, const char *line, uint mask)
 113 {
 114         pkg_t *pkg = (pkg_t *) ptr;
 115         abstract_pkg_t *ab_pkg = NULL;
 116
 117         /* these flags are a bit hackish... */
 118         static int reading_conffiles = 0, reading_description = 0;
 119         static char *description = NULL;
 120         char *s;
 121         int ret = 0;
 122
 123         /* Exclude globally masked fields. */
 124         mask |= conf->pfm;
 125
 126         /* Flip the semantics of the mask. */
 127         mask ^= PFM_ALL;
 128
 129         switch (*line) {
 130         case 'A':
 131                 if ((mask & PFM_ARCHITECTURE) && is_field("Architecture", line))
 132                         parse_architecture(pkg, line + strlen("Architecture") + 1);
 133                 else if ((mask & PFM_AUTO_INSTALLED)
 134                            && is_field("Auto-Installed", line)) {
 135                         char *tmp = parse_simple("Auto-Installed", line);
 136                         if (strcmp(tmp, "yes") == 0)
 137                                 pkg->auto_installed = 1;
 138                         free(tmp);
 139                 }
 140                 break;
 141
 142         case 'C':
 143                 if ((mask & PFM_CONFFILES) && is_field("Conffiles", line)) {
 144                         reading_conffiles = 1;
 145                         reading_description = 0;
 146                         goto dont_reset_flags;
 147                 } else if ((mask & PFM_CONFLICTS)
 148                            && is_field("Conflicts", line))
 149                         parse_deplist(pkg, CONFLICTS, line + strlen("Conflicts") + 1);
 150                 break;
 151
 152         case 'D':
 153                 if ((mask & PFM_DESCRIPTION) && is_field("Description", line)) {
 154                         description = parse_simple("Description", line);
 155                         reading_conffiles = 0;
 156                         reading_description = 1;
 157                         goto dont_reset_flags;
 158                 } else if ((mask & PFM_DEPENDS) && is_field("Depends", line))
 159                         parse_deplist(pkg, DEPEND, line + strlen("Depends") + 1);
 160                 break;
 161
 162         case 'E':
 163                 if ((mask & PFM_ESSENTIAL) && is_field("Essential", line)) {
 164                         char *tmp = parse_simple("Essential", line);
 165                         if (strcmp(tmp, "yes") == 0)
 166                                 pkg->essential = 1;
 167                         free(tmp);
 168                 }
 169                 break;
 170
 171         case 'F':
 172                 if ((mask & PFM_FILENAME) && is_field("Filename", line))
 173                         pkg_set_string(pkg, PKG_FILENAME, line + strlen("Filename") + 1);
 174                 break;
 175
 176         case 'I':
 177                 if ((mask & PFM_INSTALLED_SIZE)
 178                     && is_field("Installed-Size", line)) {
 179                         pkg_set_int(pkg, PKG_INSTALLED_SIZE, strtoul(line + strlen("Installed-Size") + 1, NULL, 0));
 180                 } else if ((mask & PFM_INSTALLED_TIME)
 181                            && is_field("Installed-Time", line)) {
 182                         pkg_set_int(pkg, PKG_INSTALLED_TIME, strtoul(line + strlen("Installed-Time") + 1, NULL, 0));
 183                 }
 184                 break;
 185
 186         case 'M':
 187                 if ((mask & PFM_MD5SUM) && (is_field("MD5sum:", line) || is_field("MD5Sum:", line)))
 188                         pkg_set_md5(pkg, line + strlen("MD5sum") + 1);
 189                 else if ((mask & PFM_MAINTAINER)
 190                          && is_field("Maintainer", line))
 191                         pkg_set_string(pkg, PKG_MAINTAINER, line + strlen("Maintainer") + 1);
 192                 break;
 193
 194         case 'P':
 195                 if ((mask & PFM_PACKAGE) && is_field("Package", line)) {
 196                         pkg->name = parse_simple("Package", line);
 197                         ab_pkg = abstract_pkg_fetch_by_name(pkg->name);
 198
 199                         if (ab_pkg && (ab_pkg->state_flag & SF_NEED_DETAIL)) {
 200                                 if (!(pkg->state_flag & SF_NEED_DETAIL)) {
 201                                         opkg_msg(DEPEND, "propagating abpkg flag to pkg %s\n", pkg->name);
 202                                         pkg->state_flag |= SF_NEED_DETAIL;
 203                                 }
 204                         }
 205                 }
 206                 else if ((mask & PFM_PRIORITY) && is_field("Priority", line))
 207                         pkg_set_string(pkg, PKG_PRIORITY, line + strlen("Priority") + 1);
 208                 else if ((mask & PFM_PROVIDES) && is_field("Provides", line))
 209                         parse_providelist(pkg, line + strlen("Provides") + 1);
 210                 else if ((mask & PFM_PRE_DEPENDS)
 211                          && is_field("Pre-Depends", line))
 212                         parse_deplist(pkg, PREDEPEND, line + strlen("Pre-Depends") + 1);
 213                 break;
 214
 215         case 'R':
 216                 if ((mask & PFM_RECOMMENDS) && is_field("Recommends", line))
 217                         parse_deplist(pkg, RECOMMEND, line + strlen("Recommends") + 1);
 218                 else if ((mask & PFM_REPLACES) && is_field("Replaces", line))
 219                         parse_replacelist(pkg, line + strlen("Replaces") + 1);
 220                 break;
 221
 222         case 'S':
 223                 if ((mask & PFM_SECTION) && is_field("Section", line))
 224                         pkg_set_string(pkg, PKG_SECTION, line + strlen("Section") + 1);
 225 #ifdef HAVE_SHA256
 226                 else if ((mask & PFM_SHA256SUM) && is_field("SHA256sum", line))
 227                         pkg_set_sha256(pkg, line + strlen("SHA256sum") + 1);
 228 #endif
 229                 else if ((mask & PFM_SIZE) && is_field("Size", line)) {
 230                         pkg_set_int(pkg, PKG_SIZE, strtoul(line + strlen("Size") + 1, NULL, 0));
 231                 } else if ((mask & PFM_SOURCE) && is_field("Source", line))
 232                         pkg_set_string(pkg, PKG_SOURCE, line + strlen("Source") + 1);
 233                 else if ((mask & PFM_STATUS) && is_field("Status", line))
 234                         parse_status(pkg, line);
 235                 else if ((mask & PFM_SUGGESTS) && is_field("Suggests", line))
 236                         parse_deplist(pkg, SUGGEST, line + strlen("Suggests") + 1);
 237                 break;
 238
 239         case 'T':
 240                 if ((mask & PFM_TAGS) && is_field("Tags", line))
 241                         pkg_set_string(pkg, PKG_TAGS, line + strlen("Tags") + 1);
 242                 break;
 243
 244         case 'V':
 245                 if ((mask & PFM_VERSION) && is_field("Version", line))
 246                         parse_version(pkg, line);
 247                 break;
 248
 249         case ' ':
 250                 if ((mask & PFM_DESCRIPTION) && reading_description) {
 251                         if (isatty(1)) {
 252                                 description = xrealloc(description,
 253                                                             strlen(description)
 254                                                             + 1 + strlen(line) +
 255                                                             1);
 256                                 strcat(description, "\n");
 257                         } else {
 258                                 description = xrealloc(description,
 259                                                             strlen(description)
 260                                                             + 1 + strlen(line));
 261                         }
 262                         strcat(description, (line));
 263                         goto dont_reset_flags;
 264                 } else if ((mask & PFM_CONFFILES) && reading_conffiles) {
 265                         parse_conffiles(pkg, line);
 266                         goto dont_reset_flags;
 267                 }
 268
 269                 /* FALLTHROUGH */
 270         default:
 271                 /* For package lists, signifies end of package. */
 272                 if (line_is_blank(line)) {
 273                         ret = 1;
 274                         break;
 275                 }
 276         }
 277
 278         if (reading_description && description) {
 279                 pkg_set_string(pkg, PKG_DESCRIPTION, description);
 280                 free(description);
 281                 reading_description = 0;
 282                 description = NULL;
 283         }
 284
 285         reading_conffiles = 0;
 286
 287 dont_reset_flags:
 288
 289         return ret;
 290 }
 291
 292 int pkg_parse_from_stream(pkg_t * pkg, FILE * fp, uint mask)
 293 {
 294         int ret;
 295         char *buf;
 296         const size_t len = 4096;
 297
 298         buf = xmalloc(len);
 299         ret =
 300             parse_from_stream_nomalloc(pkg_parse_line, pkg, fp, mask, &buf,
 301                                        len);
 302         free(buf);
 303
 304         if (pkg->name == NULL) {
 305                 /* probably just a blank line */
 306                 ret = 1;
 307         }
 308
 309         return ret;
 310 }