mage-next/src/package.c

/*
 *  Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdlib.h>
#include <stdio.h> /* printf */
#include <string.h>
#include <ctype.h>

#include "package.h"

/**
 * Some functions in this file have been adopted from the rpm source, notably
 * 'rpmvercmp' located at lib/rpmvercmp.c and 'parseEVR' located at
 * lib/rpmds.c. It was most recently updated against rpm version 4.8.1. Small
 * modifications have been made to make it more consistent with the libalpm
 * coding style.
 */

/**
 * Split EVR into epoch, version, and release components.
 * @param evr		[epoch:]version[-release] string
 * @retval *ep		pointer to epoch
 * @retval *vp		pointer to version
 * @retval *rp		pointer to release
 */
static void parseEVR(char *evr, const char **ep, const char **vp,
		const char **rp)
{
	const char *epoch;
	const char *version;
	const char *release;
	char *s, *se;

	s = evr;
	/* s points to epoch terminator */
	while (*s && isdigit(*s)) s++;
	/* se points to version terminator */
	se = strrchr(s, '-');

	if(*s == ':') {
		epoch = evr;
		*s++ = '\0';
		version = s;
		if(*epoch == '\0') {
			epoch = "0";
		}
	} else {
		/* different from RPM- always assume 0 epoch */
		epoch = "0";
		version = evr;
	}
	if(se) {
		*se++ = '\0';
		release = se;
	} else {
		release = NULL;
	}

	if(ep) *ep = epoch;
	if(vp) *vp = version;
	if(rp) *rp = release;
}

/**
 * Compare alpha and numeric segments of two versions.
 * return 1: a is newer than b
 *        0: a and b are the same version
 *       -1: b is newer than a
 */
static int rpmvercmp(const char *a, const char *b)
{
	char oldch1, oldch2;
	char *str1, *str2;
	char *ptr1, *ptr2;
	char *one, *two;
	int rc;
	int isnum;
	int ret = 0;

	/* easy comparison to see if versions are identical */
	if(strcmp(a, b) == 0) return 0;

	str1 = strdup(a);
	str2 = strdup(b);

	one = ptr1 = str1;
	two = ptr2 = str2;

	/* loop through each version segment of str1 and str2 and compare them */
	while (*one && *two) {
		while (*one && !isalnum((int)*one)) one++;
		while (*two && !isalnum((int)*two)) two++;

		/* If we ran to the end of either, we are finished with the loop */
		if (!(*one && *two)) break;

		/* If the separator lengths were different, we are also finished */
		if ((one - ptr1) != (two - ptr2)) {
			return (one - ptr1) < (two - ptr2) ? -1 : 1;
		}

		ptr1 = one;
		ptr2 = two;

		/* grab first completely alpha or completely numeric segment */
		/* leave one and two pointing to the start of the alpha or numeric */
		/* segment and walk ptr1 and ptr2 to end of segment */
		if (isdigit((int)*ptr1)) {
			while (*ptr1 && isdigit((int)*ptr1)) ptr1++;
			while (*ptr2 && isdigit((int)*ptr2)) ptr2++;
			isnum = 1;
		} else {
			while (*ptr1 && isalpha((int)*ptr1)) ptr1++;
			while (*ptr2 && isalpha((int)*ptr2)) ptr2++;
			isnum = 0;
		}

		/* save character at the end of the alpha or numeric segment */
		/* so that they can be restored after the comparison */
		oldch1 = *ptr1;
		*ptr1 = '\0';
		oldch2 = *ptr2;
		*ptr2 = '\0';

		/* this cannot happen, as we previously tested to make sure that */
		/* the first string has a non-null segment */
		if (one == ptr1) {
			ret = -1;	/* arbitrary */
			goto cleanup;
		}

		/* take care of the case where the two version segments are */
		/* different types: one numeric, the other alpha (i.e. empty) */
		/* numeric segments are always newer than alpha segments */
		/* XXX See patch #60884 (and details) from bugzilla #50977. */
		if (two == ptr2) {
			ret = isnum ? 1 : -1;
			goto cleanup;
		}

		if (isnum) {
			/* this used to be done by converting the digit segments */
			/* to ints using atoi() - it's changed because long  */
			/* digit segments can overflow an int - this should fix that. */

			/* throw away any leading zeros - it's a number, right? */
			while (*one == '0') one++;
			while (*two == '0') two++;

			/* whichever number has more digits wins */
			if (strlen(one) > strlen(two)) {
				ret = 1;
				goto cleanup;
			}
			if (strlen(two) > strlen(one)) {
				ret = -1;
				goto cleanup;
			}
		}

		/* strcmp will return which one is greater - even if the two */
		/* segments are alpha or if they are numeric.  don't return  */
		/* if they are equal because there might be more segments to */
		/* compare */
		rc = strcmp(one, two);
		if (rc) {
			ret = rc < 1 ? -1 : 1;
			goto cleanup;
		}

		/* restore character that was replaced by null above */
		*ptr1 = oldch1;
		one = ptr1;
		*ptr2 = oldch2;
		two = ptr2;
	}

	/* this catches the case where all numeric and alpha segments have */
	/* compared identically but the segment separating characters were */
	/* different */
	if ((!*one) && (!*two)) {
		ret = 0;
		goto cleanup;
	}

	/* the final showdown. we never want a remaining alpha string to
	 * beat an empty string. the logic is a bit weird, but:
	 * - if one is empty and two is not an alpha, two is newer.
	 * - if one is an alpha, two is newer.
	 * - otherwise one is newer.
	 * */
	if ( (!*one && !isalpha((int)*two))
			|| isalpha((int)*one) ) {
		ret = -1;
	} else {
		ret = 1;
	}

cleanup:
	free(str1);
	free(str2);
	return ret;
}

/** Compare two version strings and determine which one is 'newer'.
 * Returns a value comparable to the way strcmp works. Returns 1
 * if a is newer than b, 0 if a and b are the same version, or -1
 * if b is newer than a.
 *
 * Different epoch values for version strings will override any further
 * comparison. If no epoch is provided, 0 is assumed.
 *
 * Keep in mind that the pkgrel is only compared if it is available
 * on both versions handed to this function. For example, comparing
 * 1.5-1 and 1.5 will yield 0; comparing 1.5-1 and 1.5-2 will yield
 * -1 as expected. This is mainly for supporting versioned dependencies
 * that do not include the pkgrel.
 */
int alpm_pkg_vercmp(const char *a, const char *b)
{
	char *full1, *full2;
	const char *epoch1, *ver1, *rel1;
	const char *epoch2, *ver2, *rel2;
	int ret;

	/* ensure our strings are not null */
	if(!a && !b) {
		return 0;
	} else if(!a) {
		return -1;
	} else if(!b) {
		return 1;
	}
	/* another quick shortcut- if full version specs are equal */
	if(strcmp(a, b) == 0) {
		return 0;
	}

	/* Parse both versions into [epoch:]version[-release] triplets. We probably
	 * don't need epoch and release to support all the same magic, but it is
	 * easier to just run it all through the same code. */
	full1 = strdup(a);
	full2 = strdup(b);

	/* parseEVR modifies passed in version, so have to dupe it first */
	parseEVR(full1, &epoch1, &ver1, &rel1);
	parseEVR(full2, &epoch2, &ver2, &rel2);

	ret = rpmvercmp(epoch1, epoch2);
	if(ret == 0) {
		ret = rpmvercmp(ver1, ver2);
		if(ret == 0 && rel1 && rel2) {
			ret = rpmvercmp(rel1, rel2);
		}
	}

	free(full1);
	free(full2);
	return ret;
}

char *strip_chars(char *string, char *chars)
{
	char * newstr = malloc(strlen(string) + 1);
	int counter = 0;

	for ( ; *string; string++) {
	if (!strchr(chars, *string)) {
		newstr[ counter ] = *string;
		++ counter;
		}
	}

	newstr[counter] = 0;
	return newstr;
}

int check_stable_package(char *magefile)
{
	FILE *fp;
	char *line = NULL;
	char *ptr = NULL;
	char *tmp = NULL;
	char *state = NULL;
	char *distribution = NULL;
	size_t len = 0;
	ssize_t read;
	int ret = -1;

	// get distribution
	distribution = getenv("MAGE_DISTRIBUTION");
	if (strlen(distribution) > 0 ) {
		//printf("distribution: %s\n", distribution);
	}
	else {
		printf("Environment variable MAGE_DISTRIBUTION not set.\n");
		return (ret);
	}

	fp = fopen(magefile, "r");
	if (fp == NULL)
		return(ret);

	while ((read = getline(&line, &len, fp)) != -1) {
		if (strstr(line,"STATE=")) {
			ptr = strtok(line, "=");
			while (ptr != NULL) {
				// remove \n
				tmp = strip_chars(ptr, "\n");
				// remove \" too
				state = strip_chars(tmp, "\"");
				ptr = strtok(NULL, "=");
			}
		}
	}
	fclose(fp);
	if (strlen(state) > 0 ) {
		if (strcmp(distribution,"unstable") == 0) {
			if(strcmp(state,"unstable") == 0) {
				ret = 0;
			}
			if(strcmp(state,"testing") == 0) {
				ret = 0;
			}
			if(strcmp(state,"stable") == 0) {
				ret = 0;
			}
		}

		if (strcmp(distribution,"testing") == 0) {
			if(strcmp(state,"unstable") == 0) {
				ret = 1;
			}
			if(strcmp(state,"testing") == 0) {
				ret = 0;
			}
			if(strcmp(state,"stable") == 0) {
				ret = 0;
			}
		}

		if (strcmp(distribution, "stable") == 0) {
			if(strcmp(state,"unstable") == 0) {
				ret = 1;
			}
			if(strcmp(state,"testing") == 0) {
				ret = 1;
			}
			if(strcmp(state,"stable") == 0) {
				ret = 0;
			}
		}
	}
	else {
		ret = -1;
	}

	free(line);
	free(ptr);
	free(tmp);
	free(state);
	//free(distribution); //no free() required

	return(ret);
}
1	/*
2	* Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org>
3	*
4	* This program is free software; you can redistribute it and/or modify
5	* it under the terms of the GNU General Public License as published by
6	* the Free Software Foundation; either version 2 of the License, or
7	* (at your option) any later version.
8	*
9	* This program is distributed in the hope that it will be useful,
10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12	* GNU General Public License for more details.
13	*
14	* You should have received a copy of the GNU General Public License
15	* along with this program. If not, see <http://www.gnu.org/licenses/>.
16	*/
17
18	#include <stdlib.h>
19	#include <stdio.h> /* printf */
20	#include <string.h>
21	#include <ctype.h>
22
23	#include "package.h"
24
25	/**
26	* Some functions in this file have been adopted from the rpm source, notably
27	* 'rpmvercmp' located at lib/rpmvercmp.c and 'parseEVR' located at
28	* lib/rpmds.c. It was most recently updated against rpm version 4.8.1. Small
29	* modifications have been made to make it more consistent with the libalpm
30	* coding style.
31	*/
32
33	/**
34	* Split EVR into epoch, version, and release components.
35	* @param evr [epoch:]version[-release] string
36	* @retval *ep pointer to epoch
37	* @retval *vp pointer to version
38	* @retval *rp pointer to release
39	*/
40	static void parseEVR(char evr, const char ep, const char *vp,
41	const char **rp)
42	{
43	const char *epoch;
44	const char *version;
45	const char *release;
46	char s, se;
47
48	s = evr;
49	/* s points to epoch terminator */
50	while (s && isdigit(s)) s++;
51	/* se points to version terminator */
52	se = strrchr(s, '-');
53
54	if(*s == ':') {
55	epoch = evr;
56	*s++ = '\0';
57	version = s;
58	if(*epoch == '\0') {
59	epoch = "0";
60	}
61	} else {
62	/* different from RPM- always assume 0 epoch */
63	epoch = "0";
64	version = evr;
65	}
66	if(se) {
67	*se++ = '\0';
68	release = se;
69	} else {
70	release = NULL;
71	}
72
73	if(ep) *ep = epoch;
74	if(vp) *vp = version;
75	if(rp) *rp = release;
76	}
77
78	/**
79	* Compare alpha and numeric segments of two versions.
80	* return 1: a is newer than b
81	* 0: a and b are the same version
82	* -1: b is newer than a
83	*/
84	static int rpmvercmp(const char a, const char b)
85	{
86	char oldch1, oldch2;
87	char str1, str2;
88	char ptr1, ptr2;
89	char one, two;
90	int rc;
91	int isnum;
92	int ret = 0;
93
94	/* easy comparison to see if versions are identical */
95	if(strcmp(a, b) == 0) return 0;
96
97	str1 = strdup(a);
98	str2 = strdup(b);
99
100	one = ptr1 = str1;
101	two = ptr2 = str2;
102
103	/* loop through each version segment of str1 and str2 and compare them */
104	while (one && two) {
105	while (one && !isalnum((int)one)) one++;
106	while (two && !isalnum((int)two)) two++;
107
108	/* If we ran to the end of either, we are finished with the loop */
109	if (!(one && two)) break;
110
111	/* If the separator lengths were different, we are also finished */
112	if ((one - ptr1) != (two - ptr2)) {
113	return (one - ptr1) < (two - ptr2) ? -1 : 1;
114	}
115
116	ptr1 = one;
117	ptr2 = two;
118
119	/* grab first completely alpha or completely numeric segment */
120	/* leave one and two pointing to the start of the alpha or numeric */
121	/* segment and walk ptr1 and ptr2 to end of segment */
122	if (isdigit((int)*ptr1)) {
123	while (ptr1 && isdigit((int)ptr1)) ptr1++;
124	while (ptr2 && isdigit((int)ptr2)) ptr2++;
125	isnum = 1;
126	} else {
127	while (ptr1 && isalpha((int)ptr1)) ptr1++;
128	while (ptr2 && isalpha((int)ptr2)) ptr2++;
129	isnum = 0;
130	}
131
132	/* save character at the end of the alpha or numeric segment */
133	/* so that they can be restored after the comparison */
134	oldch1 = *ptr1;
135	*ptr1 = '\0';
136	oldch2 = *ptr2;
137	*ptr2 = '\0';
138
139	/* this cannot happen, as we previously tested to make sure that */
140	/* the first string has a non-null segment */
141	if (one == ptr1) {
142	ret = -1; /* arbitrary */
143	goto cleanup;
144	}
145
146	/* take care of the case where the two version segments are */
147	/* different types: one numeric, the other alpha (i.e. empty) */
148	/* numeric segments are always newer than alpha segments */
149	/* XXX See patch #60884 (and details) from bugzilla #50977. */
150	if (two == ptr2) {
151	ret = isnum ? 1 : -1;
152	goto cleanup;
153	}
154
155	if (isnum) {
156	/* this used to be done by converting the digit segments */
157	/* to ints using atoi() - it's changed because long */
158	/* digit segments can overflow an int - this should fix that. */
159
160	/* throw away any leading zeros - it's a number, right? */
161	while (*one == '0') one++;
162	while (*two == '0') two++;
163
164	/* whichever number has more digits wins */
165	if (strlen(one) > strlen(two)) {
166	ret = 1;
167	goto cleanup;
168	}
169	if (strlen(two) > strlen(one)) {
170	ret = -1;
171	goto cleanup;
172	}
173	}
174
175	/* strcmp will return which one is greater - even if the two */
176	/* segments are alpha or if they are numeric. don't return */
177	/* if they are equal because there might be more segments to */
178	/* compare */
179	rc = strcmp(one, two);
180	if (rc) {
181	ret = rc < 1 ? -1 : 1;
182	goto cleanup;
183	}
184
185	/* restore character that was replaced by null above */
186	*ptr1 = oldch1;
187	one = ptr1;
188	*ptr2 = oldch2;
189	two = ptr2;
190	}
191
192	/* this catches the case where all numeric and alpha segments have */
193	/* compared identically but the segment separating characters were */
194	/* different */
195	if ((!one) && (!two)) {
196	ret = 0;
197	goto cleanup;
198	}
199
200	/* the final showdown. we never want a remaining alpha string to
201	* beat an empty string. the logic is a bit weird, but:
202	* - if one is empty and two is not an alpha, two is newer.
203	* - if one is an alpha, two is newer.
204	* - otherwise one is newer.
205	* */
206	if ( (!one && !isalpha((int)two))
207	\|\| isalpha((int)*one) ) {
208	ret = -1;
209	} else {
210	ret = 1;
211	}
212
213	cleanup:
214	free(str1);
215	free(str2);
216	return ret;
217	}
218
219	/** Compare two version strings and determine which one is 'newer'.
220	* Returns a value comparable to the way strcmp works. Returns 1
221	* if a is newer than b, 0 if a and b are the same version, or -1
222	* if b is newer than a.
223	*
224	* Different epoch values for version strings will override any further
225	* comparison. If no epoch is provided, 0 is assumed.
226	*
227	* Keep in mind that the pkgrel is only compared if it is available
228	* on both versions handed to this function. For example, comparing
229	* 1.5-1 and 1.5 will yield 0; comparing 1.5-1 and 1.5-2 will yield
230	* -1 as expected. This is mainly for supporting versioned dependencies
231	* that do not include the pkgrel.
232	*/
233	int alpm_pkg_vercmp(const char a, const char b)
234	{
235	char full1, full2;
236	const char epoch1, ver1, *rel1;
237	const char epoch2, ver2, *rel2;
238	int ret;
239
240	/* ensure our strings are not null */
241	if(!a && !b) {
242	return 0;
243	} else if(!a) {
244	return -1;
245	} else if(!b) {
246	return 1;
247	}
248	/* another quick shortcut- if full version specs are equal */
249	if(strcmp(a, b) == 0) {
250	return 0;
251	}
252
253	/* Parse both versions into [epoch:]version[-release] triplets. We probably
254	* don't need epoch and release to support all the same magic, but it is
255	* easier to just run it all through the same code. */
256	full1 = strdup(a);
257	full2 = strdup(b);
258
259	/* parseEVR modifies passed in version, so have to dupe it first */
260	parseEVR(full1, &epoch1, &ver1, &rel1);
261	parseEVR(full2, &epoch2, &ver2, &rel2);
262
263	ret = rpmvercmp(epoch1, epoch2);
264	if(ret == 0) {
265	ret = rpmvercmp(ver1, ver2);
266	if(ret == 0 && rel1 && rel2) {
267	ret = rpmvercmp(rel1, rel2);
268	}
269	}
270
271	free(full1);
272	free(full2);
273	return ret;
274	}
275
276	char strip_chars(char string, char *chars)
277	{
278	char * newstr = malloc(strlen(string) + 1);
279	int counter = 0;
280
281	for ( ; *string; string++) {
282	if (!strchr(chars, *string)) {
283	newstr[ counter ] = *string;
284	++ counter;
285	}
286	}
287
288	newstr[counter] = 0;
289	return newstr;
290	}
291
292	int check_stable_package(char *magefile)
293	{
294	FILE *fp;
295	char *line = NULL;
296	char *ptr = NULL;
297	char *tmp = NULL;
298	char *state = NULL;
299	char *distribution = NULL;
300	size_t len = 0;
301	ssize_t read;
302	int ret = -1;
303
304	// get distribution
305	distribution = getenv("MAGE_DISTRIBUTION");
306	if (strlen(distribution) > 0 ) {
307	//printf("distribution: %s\n", distribution);
308	}
309	else {
310	printf("Environment variable MAGE_DISTRIBUTION not set.\n");
311	return (ret);
312	}
313
314	fp = fopen(magefile, "r");
315	if (fp == NULL)
316	return(ret);
317
318	while ((read = getline(&line, &len, fp)) != -1) {
319	if (strstr(line,"STATE=")) {
320	ptr = strtok(line, "=");
321	while (ptr != NULL) {
322	// remove \n
323	tmp = strip_chars(ptr, "\n");
324	// remove \" too
325	state = strip_chars(tmp, "\"");
326	ptr = strtok(NULL, "=");
327	}
328	}
329	}
330	fclose(fp);
331	if (strlen(state) > 0 ) {
332	if (strcmp(distribution,"unstable") == 0) {
333	if(strcmp(state,"unstable") == 0) {
334	ret = 0;
335	}
336	if(strcmp(state,"testing") == 0) {
337	ret = 0;
338	}
339	if(strcmp(state,"stable") == 0) {
340	ret = 0;
341	}
342	}
343
344	if (strcmp(distribution,"testing") == 0) {
345	if(strcmp(state,"unstable") == 0) {
346	ret = 1;
347	}
348	if(strcmp(state,"testing") == 0) {
349	ret = 0;
350	}
351	if(strcmp(state,"stable") == 0) {
352	ret = 0;
353	}
354	}
355
356	if (strcmp(distribution, "stable") == 0) {
357	if(strcmp(state,"unstable") == 0) {
358	ret = 1;
359	}
360	if(strcmp(state,"testing") == 0) {
361	ret = 1;
362	}
363	if(strcmp(state,"stable") == 0) {
364	ret = 0;
365	}
366	}
367	}
368	else {
369	ret = -1;
370	}
371
372	free(line);
373	free(ptr);
374	free(tmp);
375	free(state);
376	//free(distribution); //no free() required
377
378	return(ret);
379	}