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
68 /* We need to make sure that the sockets are initialized. */
72 WSAStartup (0x202, &wsadat);
76 _gpgme_sema_subsystem_init ();
77 _gpgme_debug_subsystem_init ();
78 _gpgme_io_subsystem_init ();
84 /* Read the next number in the version string STR and return it in
85 *NUMBER. Return a pointer to the tail of STR after parsing, or
86 *NULL if the version string was invalid. */
88 parse_version_number (const char *str, int *number)
90 #define MAXVAL ((INT_MAX - 10) / 10)
93 /* Leading zeros are not allowed. */
94 if (*str == '0' && isdigit(str[1]))
97 while (isdigit (*str) && val <= MAXVAL)
100 val += *(str++) - '0';
103 return val > MAXVAL ? NULL : str;
107 /* Parse the version string STR in the format MAJOR.MINOR.MICRO (for
108 example, 9.3.2) and return the components in MAJOR, MINOR and MICRO
109 as integers. The function returns the tail of the string that
110 follows the version number. This might be te empty string if there
111 is nothing following the version number, or a patchlevel. The
112 function returns NULL if the version string is not valid. */
114 parse_version_string (const char *str, int *major, int *minor, int *micro)
116 str = parse_version_number (str, major);
117 if (!str || *str != '.')
121 str = parse_version_number (str, minor);
122 if (!str || *str != '.')
126 str = parse_version_number (str, micro);
130 /* A patchlevel might follow. */
135 /* Return true if MY_VERSION is at least REQ_VERSION, and false
138 _gpgme_compare_versions (const char *my_version,
139 const char *rq_version)
141 int my_major, my_minor, my_micro;
142 int rq_major, rq_minor, rq_micro;
143 const char *my_plvl, *rq_plvl;
150 my_plvl = parse_version_string (my_version, &my_major, &my_minor, &my_micro);
154 rq_plvl = parse_version_string (rq_version, &rq_major, &rq_minor, &rq_micro);
158 if (my_major > rq_major
159 || (my_major == rq_major && my_minor > rq_minor)
160 || (my_major == rq_major && my_minor == rq_minor
161 && my_micro > rq_micro)
162 || (my_major == rq_major && my_minor == rq_minor
163 && my_micro == rq_micro && strcmp (my_plvl, rq_plvl) >= 0))
170 /* Check that the the version of the library is at minimum the
171 requested one and return the version string; return NULL if the
172 condition is not met. If a NULL is passed to this function, no
173 check is done and the version string is simply returned.
175 This function must be run once at startup, as it also initializes
176 some subsystems. Its invocation must be synchronized against
177 calling any of the other functions in a multi-threaded
180 gpgme_check_version (const char *req_version)
183 do_subsystem_inits ();
185 /* Catch-22: We need to get at least the debug subsystem ready
186 before using the trace facility. If we won't the trace would
187 automagically initialize the debug system with out the locks
188 being initialized and missing the assuan log level setting. */
189 TRACE2 (DEBUG_INIT, "gpgme_check_version", 0,
190 "req_version=%s, VERSION=%s",
191 req_version? req_version:"(null)", VERSION);
193 result = _gpgme_compare_versions (VERSION, req_version) ? VERSION : NULL;
200 /* Check the version and also at runtime if the struct layout of the
201 library matches the one of the user. This is particular useful for
202 Windows targets (-mms-bitfields). */
204 gpgme_check_version_internal (const char *req_version,
205 size_t offset_sig_validity)
209 result = gpgme_check_version (req_version);
213 /* Catch-22, see above. */
214 TRACE2 (DEBUG_INIT, "gpgme_check_version_internal", 0,
215 "req_version=%s, offset_sig_validity=%i",
216 req_version ? req_version : "(null)", offset_sig_validity);
218 if (offset_sig_validity != offsetof (struct _gpgme_signature, validity))
220 TRACE1 (DEBUG_INIT, "gpgme_check_version_internal", 0,
221 "offset_sig_validity mismatch: expected %i",
222 offsetof (struct _gpgme_signature, validity));
223 _gpgme_selftest = GPG_ERR_SELFTEST_FAILED;
230 #define LINELENGTH 80
232 /* Extract the version string of a program from STRING. The version
233 number is expected to be in GNU style format:
236 foo (bar system) 1.2.3
238 foo (bar system) 1.2.3 cruft.
240 Spaces and tabs are skipped and used as delimiters, a term in
241 (nested) parenthesis before the version string is skipped, the
242 version string may consist of any non-space and non-tab characters
243 but needs to bstart with a digit.
246 extract_version_string (const char *string, size_t *r_len)
251 for (s=string; *s; s++)
252 if (*s == ' ' || *s == '\t')
254 while (*s == ' ' || *s == '\t')
258 for (count=1, s++; count && *s; s++)
264 /* For robustness we look for a digit. */
265 while ( *s && !(*s >= '0' && *s <= '9') )
267 if (*s >= '0' && *s <= '9')
269 for (len=0; s[len]; len++)
270 if (s[len] == ' ' || s[len] == '\t')
281 /* Retrieve the version number from the --version output of the
282 program FILE_NAME. */
284 _gpgme_get_program_version (const char *const file_name)
286 char line[LINELENGTH] = "";
291 char *argv[] = {NULL /* file_name */, "--version", 0};
292 struct spawn_fd_item_s cfd[] = { {-1, 1 /* STDOUT_FILENO */, -1, 0},
298 argv[0] = (char *) file_name;
300 if (_gpgme_io_pipe (rp, 1) < 0)
305 status = _gpgme_io_spawn (file_name, argv, 0, cfd, NULL, NULL, NULL);
308 _gpgme_io_close (rp[0]);
309 _gpgme_io_close (rp[1]);
315 nread = _gpgme_io_read (rp[0], &line[linelen], LINELENGTH - linelen - 1);
318 line[linelen + nread] = '\0';
319 mark = strchr (&line[linelen], '\n');
322 if (mark > &line[0] && *mark == '\r')
330 while (nread > 0 && linelen < LINELENGTH - 1);
332 _gpgme_io_close (rp[0]);
339 s = extract_version_string (line, &len);
342 mark = malloc (len + 1);
345 memcpy (mark, s, len);