1  /*-
  2   * Copyright (c) 2011-2012 Baptiste Daroussin <bapt@FreeBSD.org>
  3   * Copyright (c) 2011-2012 Marin Atanasov Nikolov <dnaeon@gmail.com>
  4   * Copyright (c) 2013-2014 Matthew Seaman <matthew@FreeBSD.org>
  5   * Copyright (c) 2016 Vsevolod Stakhov <vsevolod@FreeBSD.org>
  6   * All rights reserved.
  7   *
  8   * Redistribution and use in source and binary forms, with or without
  9   * modification, are permitted provided that the following conditions
 10   * are met:
 11   * 1. Redistributions of source code must retain the above copyright
 12   *    notice, this list of conditions and the following disclaimer
 13   *    in this position and unchanged.
 14   * 2. Redistributions in binary form must reproduce the above copyright
 15   *    notice, this list of conditions and the following disclaimer in the
 16   *    documentation and/or other materials provided with the distribution.
 17   *
 18   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
 19   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 20   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 21   * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
 22   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 23   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 24   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 25   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 26   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 27   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 28   */
 29  
 30  #include <err.h>
 31  #include <getopt.h>
 32  #include <stdio.h>
 33  #include <unistd.h>
 34  
 35  #include <pkg.h>
 36  
 37  #include "pkgcli.h"
 38  
 39  void
 40  usage_autoremove(void)
 41  {
 42  	fprintf(stderr, "Usage: pkg autoremove [-Dynq]\n\n");
 43  	fprintf(stderr, "For more information see 'pkg help autoremove'.\n");
 44  }
 45  
 46  int
 47  exec_autoremove(int argc, char **argv)
 48  {
 49  	struct pkgdb *db = NULL;
 50  	struct pkg_jobs *jobs = NULL;
 51  	int retcode = EXIT_SUCCESS;
 52  	int ch;
 53  	int nbactions = 0;
 54  	pkg_flags f = PKG_FLAG_FORCE;
 55  	bool rc = false;
 56  	int lock_type = PKGDB_LOCK_ADVISORY;
 57  
 58  	struct option longopts[] = {
 59  		{ "dry-run",	no_argument,	NULL,	'n' },
 60  		{ "no-scripts",	no_argument,	NULL,	'D' },
 61  		{ "quiet",	no_argument,	NULL,	'q' },
 62  		{ "yes",	no_argument,	NULL,	'y' },
 63  		{ NULL,		0,		NULL,	0   },
 64  	};
 65  
 66  	while ((ch = getopt_long(argc, argv, "+Dnqy", longopts, NULL)) != -1) {
 67  		switch (ch) {
 68  		case 'n':
 69  			f |= PKG_FLAG_DRY_RUN;
 70  			dry_run = true;
 71  			lock_type = PKGDB_LOCK_READONLY;
 72  			break;
 73  		case 'D':
 74  			f |= PKG_FLAG_NOSCRIPT;
 75  			break;
 76  		case 'q':
 77  			quiet = true;
 78  			break;
 79  		case 'y':
 80  			yes = true;
 81  			break;
 82  		default:
 83  			usage_autoremove();
 84  			return (EXIT_FAILURE);
 85  		}
 86  	}
 87  	argc -= optind;
 88  
 89  	if (argc != 0) {
 90  		usage_autoremove();
 91  		return (EXIT_FAILURE);
 92  	}
 93  
 94  	if (dry_run)
 95  		retcode = pkgdb_access(PKGDB_MODE_READ, PKGDB_DB_LOCAL);
 96  	else
 97  		retcode = pkgdb_access(PKGDB_MODE_READ|PKGDB_MODE_WRITE,
 98  				       PKGDB_DB_LOCAL);
 99  
100  	if (retcode == EPKG_ENOACCESS) {
101  		warnx("Insufficient privileges to autoremove packages");
102  		return (EXIT_FAILURE);
103  	} else if (retcode == EPKG_ENODB) {
104  		warnx("No packages installed.  Nothing to do!");
105  		return (EXIT_SUCCESS);
106  	} else if (retcode != EPKG_OK) {
107  		warnx("Error accessing the package database");
108  		return (EXIT_FAILURE);
109  	}
110  
111  	if (pkgdb_open(&db, PKGDB_DEFAULT) != EPKG_OK) {
112  		return (EXIT_FAILURE);
113  	}
114  
115  	if (pkgdb_obtain_lock(db, lock_type) != EPKG_OK) {
116  		pkgdb_close(db);
117  		warnx("Cannot get an advisory lock on a database, it is locked by another process");
118  		return (EXIT_FAILURE);
119  	}
120  	/* Always force packages to be removed */
121  	if (pkg_jobs_new(&jobs, PKG_JOBS_AUTOREMOVE, db) != EPKG_OK) {
122  		pkgdb_close(db);
123  		return (EXIT_FAILURE);
124  	}
125  
126  	pkg_jobs_set_flags(jobs, f);
127  
128  	if ((retcode = pkg_jobs_solve(jobs)) != EPKG_OK) {
129  		retcode = EXIT_FAILURE;
130  		goto cleanup;
131  	}
132  
133  	if ((nbactions = pkg_jobs_count(jobs)) == 0) {
134  		if (!quiet)
135  			printf("Nothing to do.\n");
136  		goto cleanup;
137  	}
138  
139  	if (!quiet || dry_run) {
140  		print_jobs_summary(jobs,
141  				"Deinstallation has been requested for the following %d packages:\n\n", nbactions);
142  		if (!dry_run)
143  			rc = query_yesno(false,
144  		            "\nProceed with deinstalling packages? ");
145  	}
146  	if ((yes || rc ) && !dry_run && ((retcode = pkg_jobs_apply(jobs)) != EPKG_OK)) {
147  		goto cleanup;
148  	}
149  
150  	if (!yes && !rc)
151  		retcode = EXIT_FAILURE;
152  
153  	pkgdb_compact(db);
154  
155  cleanup:
156  	pkg_jobs_free(jobs);
157  	pkgdb_release_lock(db, lock_type);
158  	pkgdb_close(db);
159  
160  	return (retcode);
161  }