1 /* version.c - Version check routines.
2 Copyright (C) 2000 Werner Koch (dd9jn)
3 Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2008 g10 Code GmbH
5 This file is part of GPGME.
7 GPGME is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Lesser General Public License as
9 published by the Free Software Foundation; either version 2.1 of
10 the License, or (at your option) any later version.
12 GPGME is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
29 #ifdef HAVE_W32_SYSTEM
38 /* For _gpgme_sema_subsystem_init (). */
45 #ifdef HAVE_W32_SYSTEM
49 /* We implement this function, so we have to disable the overriding
51 #undef gpgme_check_version
54 /* Bootstrap the subsystems needed for concurrent operation. This
55 must be done once at startup. We can not guarantee this using a
56 lock, though, because the semaphore subsystem needs to be
57 initialized itself before it can be used. So we expect that the
58 user performs the necessary synchronization. */
60 do_subsystem_inits (void)
67 #ifdef HAVE_W32_SYSTEM
71 WSAStartup (0x202, &wsadat);
75 _gpgme_sema_subsystem_init ();
76 _gpgme_debug_subsystem_init ();
77 _gpgme_io_subsystem_init ();
78 #if defined(HAVE_W32_SYSTEM) && defined(HAVE_ASSUAN_H)
79 /* We need to make sure that the sockets are initialized. */
83 WSAStartup (0x202, &wsadat);
85 #endif /*HAVE_W32_SYSTEM && HAVE_ASSUAN_H*/
91 /* Read the next number in the version string STR and return it in
92 *NUMBER. Return a pointer to the tail of STR after parsing, or
93 *NULL if the version string was invalid. */
95 parse_version_number (const char *str, int *number)
97 #define MAXVAL ((INT_MAX - 10) / 10)
100 /* Leading zeros are not allowed. */
101 if (*str == '0' && isdigit(str[1]))
104 while (isdigit (*str) && val <= MAXVAL)
107 val += *(str++) - '0';
110 return val > MAXVAL ? NULL : str;
114 /* Parse the version string STR in the format MAJOR.MINOR.MICRO (for
115 example, 9.3.2) and return the components in MAJOR, MINOR and MICRO
116 as integers. The function returns the tail of the string that
117 follows the version number. This might be te empty string if there
118 is nothing following the version number, or a patchlevel. The
119 function returns NULL if the version string is not valid. */
121 parse_version_string (const char *str, int *major, int *minor, int *micro)
123 str = parse_version_number (str, major);
124 if (!str || *str != '.')
128 str = parse_version_number (str, minor);
129 if (!str || *str != '.')
133 str = parse_version_number (str, micro);
137 /* A patchlevel might follow. */
142 /* Return true if MY_VERSION is at least REQ_VERSION, and false
145 _gpgme_compare_versions (const char *my_version,
146 const char *rq_version)
148 int my_major, my_minor, my_micro;
149 int rq_major, rq_minor, rq_micro;
150 const char *my_plvl, *rq_plvl;
157 my_plvl = parse_version_string (my_version, &my_major, &my_minor, &my_micro);
161 rq_plvl = parse_version_string (rq_version, &rq_major, &rq_minor, &rq_micro);
165 if (my_major > rq_major
166 || (my_major == rq_major && my_minor > rq_minor)
167 || (my_major == rq_major && my_minor == rq_minor
168 && my_micro > rq_micro)
169 || (my_major == rq_major && my_minor == rq_minor
170 && my_micro == rq_micro && strcmp (my_plvl, rq_plvl) >= 0))
177 /* Check that the the version of the library is at minimum the
178 requested one and return the version string; return NULL if the
179 condition is not met. If a NULL is passed to this function, no
180 check is done and the version string is simply returned.
182 This function must be run once at startup, as it also initializes
183 some subsystems. Its invocation must be synchronized against
184 calling any of the other functions in a multi-threaded
187 gpgme_check_version (const char *req_version)
190 do_subsystem_inits ();
192 /* Catch-22: We need to get at least the debug subsystem ready
193 before using the trace facility. If we won't the trace would
194 automagically initialize the debug system with out the locks
195 being initialized and missing the assuan log level setting. */
196 TRACE2 (DEBUG_INIT, "gpgme_check_version", 0,
197 "req_version=%s, VERSION=%s",
198 req_version? req_version:"(null)", VERSION);
200 result = _gpgme_compare_versions (VERSION, req_version) ? VERSION : NULL;
207 /* Check the version and also at runtime if the struct layout of the
208 library matches the one of the user. This is particular useful for
209 Windows targets (-mms-bitfields). */
211 gpgme_check_version_internal (const char *req_version,
212 size_t offset_sig_validity)
216 result = gpgme_check_version (req_version);
220 /* Catch-22, see above. */
221 TRACE2 (DEBUG_INIT, "gpgme_check_version_internal", 0,
222 "req_version=%s, offset_sig_validity=%i",
223 req_version ? req_version : "(null)", offset_sig_validity);
225 if (offset_sig_validity != offsetof (struct _gpgme_signature, validity))
227 TRACE1 (DEBUG_INIT, "gpgme_check_version_internal", 0,
228 "offset_sig_validity mismatch: expected %i",
229 offsetof (struct _gpgme_signature, validity));
230 _gpgme_selftest = GPG_ERR_SELFTEST_FAILED;
237 #define LINELENGTH 80
239 /* Extract the version string of a program from STRING. The version
240 number is expected to be in GNU style format:
243 foo (bar system) 1.2.3
245 foo (bar system) 1.2.3 cruft.
247 Spaces and tabs are skipped and used as delimiters, a term in
248 (nested) parenthesis before the version string is skipped, the
249 version string may consist of any non-space and non-tab characters
250 but needs to bstart with a digit.
253 extract_version_string (const char *string, size_t *r_len)
258 for (s=string; *s; s++)
259 if (*s == ' ' || *s == '\t')
261 while (*s == ' ' || *s == '\t')
265 for (count=1, s++; count && *s; s++)
271 /* For robustness we look for a digit. */
272 while ( *s && !(*s >= '0' && *s <= '9') )
274 if (*s >= '0' && *s <= '9')
276 for (len=0; s[len]; len++)
277 if (s[len] == ' ' || s[len] == '\t')
288 /* Retrieve the version number from the --version output of the
289 program FILE_NAME. */
291 _gpgme_get_program_version (const char *const file_name)
293 char line[LINELENGTH] = "";
298 char *argv[] = {NULL /* file_name */, "--version", 0};
299 struct spawn_fd_item_s cfd[] = { {-1, 1 /* STDOUT_FILENO */, -1, 0},
305 argv[0] = (char *) file_name;
307 if (_gpgme_io_pipe (rp, 1) < 0)
312 status = _gpgme_io_spawn (file_name, argv, 0, cfd, NULL);
315 _gpgme_io_close (rp[0]);
316 _gpgme_io_close (rp[1]);
322 nread = _gpgme_io_read (rp[0], &line[linelen], LINELENGTH - linelen - 1);
325 line[linelen + nread] = '\0';
326 mark = strchr (&line[linelen], '\n');
329 if (mark > &line[0] && *mark == '\r')
337 while (nread > 0 && linelen < LINELENGTH - 1);
339 _gpgme_io_close (rp[0]);
346 s = extract_version_string (line, &len);
349 mark = malloc (len + 1);
352 memcpy (mark, s, len);