1/*
2 * FreeBSD install - a package for the installation and maintenance
3 * of non-core utilities.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * Jordan K. Hubbard
15 * 18 July 1993
16 *
17 * This is the main body of the delete module.
18 *
19 */
20
21#include <sys/cdefs.h>
22__FBSDID("$FreeBSD: releng/10.3/usr.sbin/pkg_install/delete/perform.c 228990 2011-12-30 10:58:14Z uqs $");
23
24#include <err.h>
25#include "lib.h"
26#include "delete.h"
27
28static int pkg_do(char *);
29static void sanity_check(char *);
30static void undepend(char *, char *);
31static char LogDir[FILENAME_MAX];
32
33
34int
35pkg_perform(char **pkgs)
36{
37    char **matched, **rb, **rbtmp;
38    int errcode, i, j;
39    int err_cnt = 0;
40    struct reqr_by_entry *rb_entry;
41    struct reqr_by_head *rb_list;
42
43    if (MatchType != MATCH_EXACT) {
44	matched = matchinstalled(MatchType, pkgs, &errcode);
45	if (errcode != 0)
46	    return 1;
47	    /* Not reached */
48
49	/*
50	 * Copy matched[] into pkgs[], because we'll need to use
51	 * matchinstalled() later on.
52	 */
53	if (matched != NULL) {
54	    pkgs = NULL;
55	    for (i = 0; matched[i] != NULL; i++) {
56		pkgs = realloc(pkgs, sizeof(*pkgs) * (i + 2));
57		pkgs[i] = strdup(matched[i]);
58	    }
59	    pkgs[i] = NULL;
60	}
61	else switch (MatchType) {
62	    case MATCH_GLOB:
63		break;
64	    case MATCH_ALL:
65		warnx("no packages installed");
66		return 0;
67	    case MATCH_EREGEX:
68	    case MATCH_REGEX:
69		warnx("no packages match pattern(s)");
70		return 1;
71	    default:
72		break;
73	}
74    }
75
76    err_cnt += sortdeps(pkgs);
77    for (i = 0; pkgs[i]; i++) {
78	if (Recursive == TRUE) {
79	    errcode = requiredby(pkgs[i], &rb_list, FALSE, TRUE);
80	    if (errcode < 0) {
81		err_cnt++;
82	    } else if (errcode > 0) {
83		/*
84		 * Copy values from the rb_list queue into argv-like NULL
85		 * terminated list because requiredby() uses some static
86		 * storage, while pkg_do() below will call this function,
87		 * thus blowing our rb_list away.
88		 */
89		rbtmp = rb = alloca((errcode + 1) * sizeof(*rb));
90		if (rb == NULL) {
91		    warnx("%s(): alloca() failed", __func__);
92		    err_cnt++;
93		    continue;
94		}
95		STAILQ_FOREACH(rb_entry, rb_list, link) {
96		    *rbtmp = alloca(strlen(rb_entry->pkgname) + 1);
97		    if (*rbtmp == NULL) {
98			warnx("%s(): alloca() failed", __func__);
99			err_cnt++;
100			continue;
101		    }
102		    strcpy(*rbtmp, rb_entry->pkgname);
103		    rbtmp++;
104		}
105		*rbtmp = NULL;
106
107		err_cnt += sortdeps(rb);
108		for (j = 0; rb[j]; j++)
109		    err_cnt += pkg_do(rb[j]);
110	    }
111	}
112	err_cnt += pkg_do(pkgs[i]);
113    }
114
115    return err_cnt;
116}
117
118static Package Plist;
119
120/* This is seriously ugly code following.  Written very fast! */
121static int
122pkg_do(char *pkg)
123{
124    FILE *cfile;
125    char *deporigin, **deporigins = NULL, **depnames = NULL, ***depmatches, home[FILENAME_MAX];
126    PackingList p;
127    int i, len;
128    int isinstalled;
129    /* support for separate pre/post install scripts */
130    int new_m = 0, dep_count = 0;
131    const char *pre_script = DEINSTALL_FNAME;
132    const char *post_script, *pre_arg, *post_arg;
133    struct reqr_by_entry *rb_entry;
134    struct reqr_by_head *rb_list;
135    int fd;
136    struct stat sb;
137
138    if (!pkg || !(len = strlen(pkg)))
139	return 1;
140    if (pkg[len - 1] == '/')
141	pkg[len - 1] = '\0';
142
143    /* Reset some state */
144    if (Plist.head)
145	free_plist(&Plist);
146
147    sprintf(LogDir, "%s/%s", LOG_DIR, pkg);
148
149    isinstalled = isinstalledpkg(pkg);
150    if (isinstalled == 0) {
151	warnx("no such package '%s' installed", pkg);
152	return 1;
153    } else if (isinstalled < 0) {
154	warnx("the package info for package '%s' is corrupt%s",
155	      pkg, Force ? " (but I'll delete it anyway)" : " (use -f to force removal)");
156	if (!Force)
157	    return 1;
158    	if (!Fake) {
159	    if (vsystem("%s -rf %s", REMOVE_CMD, LogDir)) {
160    		warnx("couldn't remove log entry in %s, deinstall failed", LogDir);
161	    } else {
162    		warnx("couldn't completely deinstall package '%s',\n"
163		      "only the log entry in %s was removed", pkg, LogDir);
164	    }
165	}
166	return 0;
167    }
168
169    if (!getcwd(home, FILENAME_MAX)) {
170	cleanup(0);
171	errx(2, "%s: unable to get current working directory!", __func__);
172    }
173
174    if (chdir(LogDir) == FAIL) {
175	warnx("unable to change directory to %s! deinstall failed", LogDir);
176	return 1;
177    }
178
179    if (Interactive == TRUE) {
180	int first, ch;
181
182	(void)fprintf(stderr, "delete %s? ", pkg);
183	(void)fflush(stderr);
184	first = ch = getchar();
185	while (ch != '\n' && ch != EOF)
186	    ch = getchar();
187	if (first != 'y' && first != 'Y')
188	    return 0;
189	    /* Not reached */
190    }
191
192    if (requiredby(pkg, &rb_list, FALSE, TRUE) < 0)
193	return 1;
194    if (!STAILQ_EMPTY(rb_list)) {
195	warnx("package '%s' is required by these other packages\n"
196	      "and may not be deinstalled%s:",
197	      pkg, Force ? " (but I'll delete it anyway)" : "");
198	STAILQ_FOREACH(rb_entry, rb_list, link)
199	    fprintf(stderr, "%s\n", rb_entry->pkgname);
200	if (!Force)
201	    return 1;
202    }
203
204    sanity_check(LogDir);
205    cfile = fopen(CONTENTS_FNAME, "r");
206
207    if (!cfile) {
208	warnx("unable to open '%s' file", CONTENTS_FNAME);
209	return 1;
210    }
211
212    /* If we have a prefix, add it now */
213    if (Prefix)
214	add_plist(&Plist, PLIST_CWD, Prefix);
215    read_plist(&Plist, cfile);
216    fclose(cfile);
217    p = find_plist(&Plist, PLIST_CWD);
218
219    if (!p) {
220	warnx("package '%s' doesn't have a prefix", pkg);
221	return 1;
222    }
223
224    setenv(PKG_PREFIX_VNAME, p->name, 1);
225
226    if ((fd = open(REQUIRE_FNAME, O_RDWR)) != -1) {
227	fstat(fd, &sb);
228	fchmod(fd, sb.st_mode | S_IXALL);       /* be sure, chmod a+x */
229	close(fd);
230	if (Verbose)
231	    printf("Executing 'require' script.\n");
232	if (vsystem("./%s %s DEINSTALL", REQUIRE_FNAME, pkg)) {
233	    warnx("package %s fails requirements %s", pkg,
234		   Force ? "" : "- not deleted");
235	    if (!Force)
236		return 1;
237	}
238    }
239
240    /*
241     * Test whether to use the old method of passing tokens to deinstallation
242     * scripts, and set appropriate variables..
243     */
244
245    if (fexists(POST_DEINSTALL_FNAME)) {
246	new_m = 1;
247	post_script = POST_DEINSTALL_FNAME;
248	pre_arg = post_arg = "";
249    } else if (fexists(DEINSTALL_FNAME)) {
250	post_script = DEINSTALL_FNAME;
251	pre_arg = "DEINSTALL";
252	post_arg = "POST-DEINSTALL";
253    } else {
254	post_script = pre_arg = post_arg = NULL;
255    }
256
257    if (!NoDeInstall && pre_script != NULL && (fd = open(pre_script, O_RDWR)) != -1) {
258	if (Fake)
259	    printf("Would execute de-install script at this point.\n");
260	else {
261	    fstat(fd, &sb);
262	    fchmod(fd, sb.st_mode | S_IXALL);       /* be sure, chmod a+x */
263	    close(fd);
264	    if (vsystem("./%s %s %s", pre_script, pkg, pre_arg)) {
265		warnx("deinstall script returned error status");
266		if (!Force)
267		    return 1;
268	    }
269	}
270    }
271
272    for (p = Plist.head; p ; p = p->next) {
273	if (p->type != PLIST_PKGDEP)
274	    continue;
275	deporigin = (p->next != NULL && p->next->type == PLIST_DEPORIGIN) ? p->next->name :
276							 NULL;
277	if (Verbose) {
278	    printf("Trying to remove dependency on package '%s'", p->name);
279	    if (deporigin != NULL)
280		printf(" with '%s' origin", deporigin);
281	    printf(".\n");
282	}
283	if (!Fake) {
284	    if (deporigin) {
285		deporigins = realloc(deporigins, (dep_count + 2) * sizeof(*deporigins));
286		depnames = realloc(depnames, (dep_count + 1) * sizeof(*depnames));
287		deporigins[dep_count] = deporigin;
288		deporigins[dep_count + 1] = NULL;
289		depnames[dep_count] = p->name;
290		dep_count++;
291	    } else {
292		undepend(p->name, pkg);
293	    }
294	}
295    }
296
297    if (dep_count > 0) {
298	/* Undepend all the dependencies at once */
299	depmatches = matchallbyorigin((const char **)deporigins, NULL);
300	free(deporigins);
301	if (depmatches) {
302	    for (i = 0; i < dep_count; i++) {
303		if (depmatches[i]) {
304		    char **tmp = depmatches[i];
305		    int j;
306		    for (j = 0; tmp[j] != NULL; j++)
307			undepend(tmp[j], pkg);
308		} else if (depnames[i]) {
309		    undepend(depnames[i], pkg);
310		}
311	    }
312	}
313    }
314
315    if (chdir(home) == FAIL) {
316	cleanup(0);
317	errx(2, "%s: unable to return to working directory %s!", __func__,
318	    home);
319    }
320
321    /*
322     * Some packages aren't packed right, so we need to just ignore
323     * delete_package()'s status.  Ugh! :-(
324     */
325    if (delete_package(FALSE, CleanDirs, &Plist) == FAIL)
326	warnx(
327	"couldn't entirely delete package `%s'\n"
328	"(perhaps the packing list is incorrectly specified?)", pkg);
329
330    if (chdir(LogDir) == FAIL) {
331 	warnx("unable to change directory to %s! deinstall failed", LogDir);
332 	return 1;
333    }
334
335    if (!NoDeInstall && post_script != NULL && (fd = open(post_script, O_RDWR)) != -1) {
336 	if (Fake)
337 	    printf("Would execute post-deinstall script at this point.\n");
338 	else {
339	    fstat(fd, &sb);
340	    fchmod(fd, sb.st_mode | S_IXALL);       /* be sure, chmod a+x */
341	    close(fd);
342 	    if (vsystem("./%s %s %s", post_script, pkg, post_arg)) {
343 		warnx("post-deinstall script returned error status");
344 		if (!Force)
345 		    return 1;
346 	    }
347 	}
348    }
349
350    if (chdir(home) == FAIL) {
351 	cleanup(0);
352	errx(2, "%s: unable to return to working directory %s!", __func__,
353	    home);
354    }
355
356    if (!Fake) {
357	if (vsystem("%s -r%c %s", REMOVE_CMD, Force ? 'f' : ' ', LogDir)) {
358	    warnx("couldn't remove log entry in %s, deinstall failed", LogDir);
359	    if (!Force)
360		return 1;
361	}
362    }
363    return 0;
364}
365
366static void
367sanity_check(char *pkg)
368{
369    if (!fexists(CONTENTS_FNAME)) {
370	cleanup(0);
371	errx(2, "%s: installed package %s has no %s file!", __func__,
372	    pkg, CONTENTS_FNAME);
373    }
374}
375
376void
377cleanup(int sig)
378{
379    if (sig)
380	exit(1);
381}
382
383static void
384undepend(char *p, char *pkgname)
385{
386    char fname[FILENAME_MAX], ftmp[FILENAME_MAX];
387    FILE *fpwr;
388    int s;
389    struct reqr_by_entry *rb_entry;
390    struct reqr_by_head *rb_list;
391
392
393    if (requiredby(p, &rb_list, Verbose, FALSE) <= 0)
394	return;
395    snprintf(fname, sizeof(fname), "%s/%s/%s", LOG_DIR, p, REQUIRED_BY_FNAME);
396    snprintf(ftmp, sizeof(ftmp), "%s.XXXXXX", fname);
397    s = mkstemp(ftmp);
398    if (s == -1) {
399	warnx("couldn't open temp file '%s'", ftmp);
400	return;
401    }
402    fpwr = fdopen(s, "w");
403    if (fpwr == NULL) {
404	close(s);
405	warnx("couldn't fdopen temp file '%s'", ftmp);
406	goto cleanexit;
407    }
408    STAILQ_FOREACH(rb_entry, rb_list, link)
409	if (strcmp(rb_entry->pkgname, pkgname))		/* no match */
410	    fputs(rb_entry->pkgname, fpwr), putc('\n', fpwr);
411    if (fchmod(s, 0644) == FAIL) {
412	warnx("error changing permission of temp file '%s'", ftmp);
413	fclose(fpwr);
414	goto cleanexit;
415    }
416    if (fclose(fpwr) == EOF) {
417	warnx("error closing temp file '%s'", ftmp);
418	goto cleanexit;
419    }
420    if (rename(ftmp, fname) == -1)
421	warnx("error renaming '%s' to '%s'", ftmp, fname);
422cleanexit:
423    remove(ftmp);
424    return;
425}
426