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         char *s;
 125         int ret = 0;
 126
 127         /* Exclude globally masked fields. */
 128         mask |= conf->pfm;
 129
 130         /* Flip the semantics of the mask. */
 131         mask ^= PFM_ALL;
 132
 133         switch (*line) {
 134         case 'A':
 135                 if ((mask & PFM_ARCHITECTURE) && is_field("Architecture", line))
 136                         parse_architecture(pkg, line + strlen("Architecture") + 1);
 137                 else if ((mask & PFM_AUTO_INSTALLED)
 138                            && is_field("Auto-Installed", line)) {
 139                         char *tmp = parse_simple("Auto-Installed", line);
 140                         if (strcmp(tmp, "yes") == 0)
 141                                 pkg->auto_installed = 1;
 142                         free(tmp);
 143                 }
 144                 break;
 145
 146         case 'C':
 147                 if ((mask & PFM_CONFFILES) && is_field("Conffiles", line)) {
 148                         reading_conffiles = 1;
 149                         reading_description = 0;
 150
 151                         cl = xcalloc(1, sizeof(*cl));
 152                         conffile_list_init(cl);
 153                         pkg_set_ptr(pkg, PKG_CONFFILES, cl);
 154
 155                         goto dont_reset_flags;
 156                 } else if ((mask & PFM_CONFLICTS)
 157                            && is_field("Conflicts", line))
 158                         parse_deplist(pkg, CONFLICTS, line + strlen("Conflicts") + 1);
 159                 break;
 160
 161         case 'D':
 162                 if ((mask & PFM_DESCRIPTION) && is_field("Description", line)) {
 163                         description = parse_simple("Description", line);
 164                         reading_conffiles = 0;
 165                         reading_description = 1;
 166                         goto dont_reset_flags;
 167                 } else if ((mask & PFM_DEPENDS) && is_field("Depends", line))
 168                         parse_deplist(pkg, DEPEND, line + strlen("Depends") + 1);
 169                 break;
 170
 171         case 'E':
 172                 if ((mask & PFM_ESSENTIAL) && is_field("Essential", line)) {
 173                         char *tmp = parse_simple("Essential", line);
 174                         if (strcmp(tmp, "yes") == 0)
 175                                 pkg->essential = 1;
 176                         free(tmp);
 177                 }
 178                 break;
 179
 180         case 'F':
 181                 if ((mask & PFM_FILENAME) && is_field("Filename", line))
 182                         pkg_set_string(pkg, PKG_FILENAME, line + strlen("Filename") + 1);
 183                 break;
 184
 185         case 'I':
 186                 if ((mask & PFM_INSTALLED_SIZE)
 187                     && is_field("Installed-Size", line)) {
 188                         pkg_set_int(pkg, PKG_INSTALLED_SIZE, strtoul(line + strlen("Installed-Size") + 1, NULL, 0));
 189                 } else if ((mask & PFM_INSTALLED_TIME)
 190                            && is_field("Installed-Time", line)) {
 191                         pkg_set_int(pkg, PKG_INSTALLED_TIME, strtoul(line + strlen("Installed-Time") + 1, NULL, 0));
 192                 }
 193                 break;
 194
 195         case 'M':
 196                 if ((mask & PFM_MD5SUM) && (is_field("MD5sum:", line) || is_field("MD5Sum:", line)))
 197                         pkg_set_md5(pkg, line + strlen("MD5sum") + 1);
 198                 else if ((mask & PFM_MAINTAINER)
 199                          && is_field("Maintainer", line))
 200                         pkg_set_string(pkg, PKG_MAINTAINER, line + strlen("Maintainer") + 1);
 201                 break;
 202
 203         case 'P':
 204                 if ((mask & PFM_PACKAGE) && is_field("Package", line)) {
 205                         pkg->name = parse_simple("Package", line);
 206                         ab_pkg = abstract_pkg_fetch_by_name(pkg->name);
 207
 208                         if (ab_pkg && (ab_pkg->state_flag & SF_NEED_DETAIL)) {
 209                                 if (!(pkg->state_flag & SF_NEED_DETAIL)) {
 210                                         opkg_msg(DEPEND, "propagating abpkg flag to pkg %s\n", pkg->name);
 211                                         pkg->state_flag |= SF_NEED_DETAIL;
 212                                 }
 213                         }
 214                 }
 215                 else if ((mask & PFM_PRIORITY) && is_field("Priority", line))
 216                         pkg_set_string(pkg, PKG_PRIORITY, line + strlen("Priority") + 1);
 217                 else if ((mask & PFM_PROVIDES) && is_field("Provides", line))
 218                         parse_providelist(pkg, line + strlen("Provides") + 1);
 219                 else if ((mask & PFM_PRE_DEPENDS)
 220                          && is_field("Pre-Depends", line))
 221                         parse_deplist(pkg, PREDEPEND, line + strlen("Pre-Depends") + 1);
 222                 break;
 223
 224         case 'R':
 225                 if ((mask & PFM_RECOMMENDS) && is_field("Recommends", line))
 226                         parse_deplist(pkg, RECOMMEND, line + strlen("Recommends") + 1);
 227                 else if ((mask & PFM_REPLACES) && is_field("Replaces", line))
 228                         parse_replacelist(pkg, line + strlen("Replaces") + 1);
 229                 break;
 230
 231         case 'S':
 232                 if ((mask & PFM_SECTION) && is_field("Section", line))
 233                         pkg_set_string(pkg, PKG_SECTION, line + strlen("Section") + 1);
 234                 else if ((mask & PFM_SHA256SUM) && is_field("SHA256sum", line))
 235                         pkg_set_sha256(pkg, line + strlen("SHA256sum") + 1);
 236                 else if ((mask & PFM_SIZE) && is_field("Size", line)) {
 237                         pkg_set_int(pkg, PKG_SIZE, strtoul(line + strlen("Size") + 1, NULL, 0));
 238                 } else if ((mask & PFM_SOURCE) && is_field("Source", line))
 239                         pkg_set_string(pkg, PKG_SOURCE, line + strlen("Source") + 1);
 240                 else if ((mask & PFM_STATUS) && is_field("Status", line))
 241                         parse_status(pkg, line);
 242                 else if ((mask & PFM_SUGGESTS) && is_field("Suggests", line))
 243                         parse_deplist(pkg, SUGGEST, line + strlen("Suggests") + 1);
 244                 break;
 245
 246         case 'T':
 247                 if ((mask & PFM_TAGS) && is_field("Tags", line))
 248                         pkg_set_string(pkg, PKG_TAGS, line + strlen("Tags") + 1);
 249                 break;
 250
 251         case 'V':
 252                 if ((mask & PFM_VERSION) && is_field("Version", line))
 253                         parse_version(pkg, line);
 254                 break;
 255
 256         case ' ':
 257                 if ((mask & PFM_DESCRIPTION) && reading_description) {
 258                         if (isatty(1)) {
 259                                 description = xrealloc(description,
 260                                                             strlen(description)
 261                                                             + 1 + strlen(line) +
 262                                                             1);
 263                                 strcat(description, "\n");
 264                         } else {
 265                                 description = xrealloc(description,
 266                                                             strlen(description)
 267                                                             + 1 + strlen(line));
 268                         }
 269                         strcat(description, (line));
 270                         goto dont_reset_flags;
 271                 } else if ((mask & PFM_CONFFILES) && reading_conffiles) {
 272                         parse_conffiles(pkg, line);
 273                         goto dont_reset_flags;
 274                 }
 275
 276                 /* FALLTHROUGH */
 277         default:
 278                 /* For package lists, signifies end of package. */
 279                 if (line_is_blank(line)) {
 280                         ret = 1;
 281                         break;
 282                 }
 283         }
 284
 285         if (reading_description && description) {
 286                 pkg_set_string(pkg, PKG_DESCRIPTION, description);
 287                 free(description);
 288                 reading_description = 0;
 289                 description = NULL;
 290         }
 291
 292         reading_conffiles = 0;
 293
 294 dont_reset_flags:
 295
 296         return ret;
 297 }
 298
 299 int pkg_parse_from_stream(pkg_t * pkg, FILE * fp, uint mask)
 300 {
 301         int ret;
 302         char *buf;
 303         const size_t len = 4096;
 304
 305         buf = xmalloc(len);
 306         ret =
 307             parse_from_stream_nomalloc(pkg_parse_line, pkg, fp, mask, &buf,
 308                                        len);
 309         free(buf);
 310
 311         if (pkg->name == NULL) {
 312                 /* probably just a blank line */
 313                 ret = 1;
 314         }
 315
 316         return ret;
 317 }