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 and _gpgme_status_init. */
46 #ifdef HAVE_W32_SYSTEM
50 /* We implement this function, so we have to disable the overriding
52 #undef gpgme_check_version
55 /* Bootstrap the subsystems needed for concurrent operation. This
56 must be done once at startup. We can not guarantee this using a
57 lock, though, because the semaphore subsystem needs to be
58 initialized itself before it can be used. So we expect that the
59 user performs the necessary synchronization. */
61 do_subsystem_inits (void)
68 #ifdef HAVE_W32_SYSTEM
69 /* We need to make sure that the sockets are initialized. */
73 WSAStartup (0x202, &wsadat);
77 _gpgme_sema_subsystem_init ();
78 _gpgme_debug_subsystem_init ();
79 _gpgme_io_subsystem_init ();
80 _gpgme_status_init ();
86 /* Read the next number in the version string STR and return it in
87 *NUMBER. Return a pointer to the tail of STR after parsing, or
88 *NULL if the version string was invalid. */
90 parse_version_number (const char *str, int *number)
92 #define MAXVAL ((INT_MAX - 10) / 10)
95 /* Leading zeros are not allowed. */
96 if (*str == '0' && isdigit(str[1]))
99 while (isdigit (*str) && val <= MAXVAL)
102 val += *(str++) - '0';
105 return val > MAXVAL ? NULL : str;
109 /* Parse the version string STR in the format MAJOR.MINOR.MICRO (for
110 example, 9.3.2) and return the components in MAJOR, MINOR and MICRO
111 as integers. The function returns the tail of the string that
112 follows the version number. This might be te empty string if there
113 is nothing following the version number, or a patchlevel. The
114 function returns NULL if the version string is not valid. */
116 parse_version_string (const char *str, int *major, int *minor, int *micro)
118 str = parse_version_number (str, major);
119 if (!str || *str != '.')
123 str = parse_version_number (str, minor);
124 if (!str || *str != '.')
128 str = parse_version_number (str, micro);
132 /* A patchlevel might follow. */
137 /* Return true if MY_VERSION is at least REQ_VERSION, and false
140 _gpgme_compare_versions (const char *my_version,
141 const char *rq_version)
143 int my_major, my_minor, my_micro;
144 int rq_major, rq_minor, rq_micro;
145 const char *my_plvl, *rq_plvl;
152 my_plvl = parse_version_string (my_version, &my_major, &my_minor, &my_micro);
156 rq_plvl = parse_version_string (rq_version, &rq_major, &rq_minor, &rq_micro);
160 if (my_major > rq_major
161 || (my_major == rq_major && my_minor > rq_minor)
162 || (my_major == rq_major && my_minor == rq_minor
163 && my_micro > rq_micro)
164 || (my_major == rq_major && my_minor == rq_minor
165 && my_micro == rq_micro && strcmp (my_plvl, rq_plvl) >= 0))
172 /* Check that the the version of the library is at minimum the
173 requested one and return the version string; return NULL if the
174 condition is not met. If a NULL is passed to this function, no
175 check is done and the version string is simply returned.
177 This function must be run once at startup, as it also initializes
178 some subsystems. Its invocation must be synchronized against
179 calling any of the other functions in a multi-threaded
182 gpgme_check_version (const char *req_version)
185 do_subsystem_inits ();
187 /* Catch-22: We need to get at least the debug subsystem ready
188 before using the trace facility. If we won't the trace would
189 automagically initialize the debug system with out the locks
190 being initialized and missing the assuan log level setting. */
191 TRACE2 (DEBUG_INIT, "gpgme_check_version", 0,
192 "req_version=%s, VERSION=%s",
193 req_version? req_version:"(null)", VERSION);
195 result = _gpgme_compare_versions (VERSION, req_version) ? VERSION : NULL;
202 /* Check the version and also at runtime if the struct layout of the
203 library matches the one of the user. This is particular useful for
204 Windows targets (-mms-bitfields). */
206 gpgme_check_version_internal (const char *req_version,
207 size_t offset_sig_validity)
211 result = gpgme_check_version (req_version);
215 /* Catch-22, see above. */
216 TRACE2 (DEBUG_INIT, "gpgme_check_version_internal", 0,
217 "req_version=%s, offset_sig_validity=%i",
218 req_version ? req_version : "(null)", offset_sig_validity);
220 if (offset_sig_validity != offsetof (struct _gpgme_signature, validity))
222 TRACE1 (DEBUG_INIT, "gpgme_check_version_internal", 0,
223 "offset_sig_validity mismatch: expected %i",
224 offsetof (struct _gpgme_signature, validity));
225 _gpgme_selftest = GPG_ERR_SELFTEST_FAILED;
232 #define LINELENGTH 80
234 /* Extract the version string of a program from STRING. The version
235 number is expected to be in GNU style format:
238 foo (bar system) 1.2.3
240 foo (bar system) 1.2.3 cruft.
242 Spaces and tabs are skipped and used as delimiters, a term in
243 (nested) parenthesis before the version string is skipped, the
244 version string may consist of any non-space and non-tab characters
245 but needs to bstart with a digit.
248 extract_version_string (const char *string, size_t *r_len)
253 for (s=string; *s; s++)
254 if (*s == ' ' || *s == '\t')
256 while (*s == ' ' || *s == '\t')
260 for (count=1, s++; count && *s; s++)
266 /* For robustness we look for a digit. */
267 while ( *s && !(*s >= '0' && *s <= '9') )
269 if (*s >= '0' && *s <= '9')
271 for (len=0; s[len]; len++)
272 if (s[len] == ' ' || s[len] == '\t')
283 /* Retrieve the version number from the --version output of the
284 program FILE_NAME. */
286 _gpgme_get_program_version (const char *const file_name)
288 char line[LINELENGTH] = "";
293 char *argv[] = {NULL /* file_name */, "--version", 0};
294 struct spawn_fd_item_s cfd[] = { {-1, 1 /* STDOUT_FILENO */, -1, 0},
300 argv[0] = (char *) file_name;
302 if (_gpgme_io_pipe (rp, 1) < 0)
307 status = _gpgme_io_spawn (file_name, argv, 0, cfd, NULL, NULL, NULL);
310 _gpgme_io_close (rp[0]);
311 _gpgme_io_close (rp[1]);
317 nread = _gpgme_io_read (rp[0], &line[linelen], LINELENGTH - linelen - 1);
320 line[linelen + nread] = '\0';
321 mark = strchr (&line[linelen], '\n');
324 if (mark > &line[0] && *mark == '\r')
332 while (nread > 0 && linelen < LINELENGTH - 1);
334 _gpgme_io_close (rp[0]);
341 s = extract_version_string (line, &len);
344 mark = malloc (len + 1);
347 memcpy (mark, s, len);