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1 | /* |
2 | * libdpkg - Debian packaging suite library routines | |
3 | * pkg-spec.c - primitives for pkg specifier handling | |
4 | * | |
5 | * Copyright © 2011 Linaro Limited | |
6 | * Copyright © 2011 Raphaël Hertzog <hertzog@debian.org> | |
7 | * Copyright © 2011-2015 Guillem Jover <guillem@debian.org> | |
8 | * | |
9 | * This is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program. If not, see <https://www.gnu.org/licenses/>. | |
21 | */ | |
22 | ||
23 | #include <config.h> | |
24 | #include <compat.h> | |
25 | ||
26 | #include <stdlib.h> | |
27 | #include <fnmatch.h> | |
28 | #include <string.h> | |
29 | ||
30 | #include <dpkg/i18n.h> | |
31 | #include <dpkg/dpkg.h> | |
32 | #include <dpkg/dpkg-db.h> | |
33 | #include <dpkg/arch.h> | |
34 | #include <dpkg/pkg-spec.h> | |
35 | ||
36 | static void | |
37 | pkg_spec_blank(struct pkg_spec *ps) | |
38 | { | |
39 | ps->name = NULL; | |
40 | ps->arch = NULL; | |
41 | ||
42 | ps->name_is_pattern = false; | |
43 | ps->arch_is_pattern = false; | |
44 | } | |
45 | ||
46 | static void | |
47 | pkg_spec_iter_blank(struct pkg_spec *ps) | |
48 | { | |
49 | ps->pkg_iter = NULL; | |
50 | ps->pkg_next = NULL; | |
51 | } | |
52 | ||
53 | void | |
54 | pkg_spec_init(struct pkg_spec *ps, enum pkg_spec_flags flags) | |
55 | { | |
56 | ps->flags = flags; | |
57 | ||
58 | pkg_spec_blank(ps); | |
59 | pkg_spec_iter_blank(ps); | |
60 | } | |
61 | ||
62 | const char * | |
63 | pkg_spec_is_illegal(struct pkg_spec *ps) | |
64 | { | |
65 | static char msg[1024]; | |
66 | const char *emsg; | |
67 | ||
68 | if (!ps->name_is_pattern && | |
69 | (emsg = pkg_name_is_illegal(ps->name))) { | |
70 | const char *arch_sep; | |
71 | ||
72 | /* Only check for DPKG_ARCH_NONE, because for everything else | |
73 | * we want to see the passed package specification, even if | |
74 | * the architecture is empty. */ | |
75 | if (ps->arch->type == DPKG_ARCH_NONE) | |
76 | arch_sep = ""; | |
77 | else | |
78 | arch_sep = ":"; | |
79 | ||
80 | snprintf(msg, sizeof(msg), | |
81 | _("illegal package name in specifier '%s%s%s': %s"), | |
82 | ps->name, arch_sep, ps->arch->name, emsg); | |
83 | return msg; | |
84 | } | |
85 | ||
86 | if ((!ps->arch_is_pattern && ps->arch->type == DPKG_ARCH_ILLEGAL) || | |
87 | ps->arch->type == DPKG_ARCH_EMPTY) { | |
88 | emsg = dpkg_arch_name_is_illegal(ps->arch->name); | |
89 | snprintf(msg, sizeof(msg), | |
90 | _("illegal architecture name in specifier '%s:%s': %s"), | |
91 | ps->name, ps->arch->name, emsg); | |
92 | return msg; | |
93 | } | |
94 | ||
95 | /* If we have been requested a single instance, check that the | |
96 | * package does not contain other instances. */ | |
97 | if (!ps->arch_is_pattern && ps->flags & PKG_SPEC_ARCH_SINGLE) { | |
98 | struct pkgset *set; | |
99 | ||
100 | set = pkg_db_find_set(ps->name); | |
101 | ||
102 | /* Single instancing only applies with no architecture. */ | |
103 | if (ps->arch->type == DPKG_ARCH_NONE && | |
104 | pkgset_installed_instances(set) > 1) { | |
105 | snprintf(msg, sizeof(msg), | |
106 | _("ambiguous package name '%s' with more " | |
107 | "than one installed instance"), ps->name); | |
108 | return msg; | |
109 | } | |
110 | } | |
111 | ||
112 | return NULL; | |
113 | } | |
114 | ||
115 | static const char * | |
116 | pkg_spec_prep(struct pkg_spec *ps, char *pkgname, const char *archname) | |
117 | { | |
118 | ps->name = pkgname; | |
119 | ps->arch = dpkg_arch_find(archname); | |
120 | ||
121 | ps->name_is_pattern = false; | |
122 | ps->arch_is_pattern = false; | |
123 | ||
124 | /* Detect if we have patterns and/or illegal names. */ | |
125 | if ((ps->flags & PKG_SPEC_PATTERNS) && strpbrk(ps->name, "*[?\\")) | |
126 | ps->name_is_pattern = true; | |
127 | ||
128 | if ((ps->flags & PKG_SPEC_PATTERNS) && strpbrk(ps->arch->name, "*[?\\")) | |
129 | ps->arch_is_pattern = true; | |
130 | ||
131 | return pkg_spec_is_illegal(ps); | |
132 | } | |
133 | ||
134 | const char * | |
135 | pkg_spec_set(struct pkg_spec *ps, const char *pkgname, const char *archname) | |
136 | { | |
137 | return pkg_spec_prep(ps, m_strdup(pkgname), archname); | |
138 | } | |
139 | ||
140 | const char * | |
141 | pkg_spec_parse(struct pkg_spec *ps, const char *str) | |
142 | { | |
143 | char *pkgname, *archname; | |
144 | ||
145 | archname = strchr(str, ':'); | |
146 | if (archname == NULL) { | |
147 | pkgname = m_strdup(str); | |
148 | } else { | |
149 | pkgname = m_strndup(str, archname - str); | |
150 | archname++; | |
151 | } | |
152 | ||
153 | return pkg_spec_prep(ps, pkgname, archname); | |
154 | } | |
155 | ||
156 | static bool | |
157 | pkg_spec_match_name(struct pkg_spec *ps, const char *name) | |
158 | { | |
159 | if (ps->name_is_pattern) | |
160 | return (fnmatch(ps->name, name, 0) == 0); | |
161 | else | |
162 | return (strcmp(ps->name, name) == 0); | |
163 | } | |
164 | ||
165 | static bool | |
166 | pkg_spec_match_arch(struct pkg_spec *ps, struct pkginfo *pkg, | |
167 | const struct dpkg_arch *arch) | |
168 | { | |
169 | if (ps->arch_is_pattern) | |
170 | return (fnmatch(ps->arch->name, arch->name, 0) == 0); | |
171 | else if (ps->arch->type != DPKG_ARCH_NONE) /* !arch_is_pattern */ | |
172 | return (ps->arch == arch); | |
173 | ||
174 | /* No arch specified. */ | |
175 | switch (ps->flags & PKG_SPEC_ARCH_MASK) { | |
176 | case PKG_SPEC_ARCH_SINGLE: | |
177 | return pkgset_installed_instances(pkg->set) <= 1; | |
178 | case PKG_SPEC_ARCH_WILDCARD: | |
179 | return true; | |
180 | default: | |
181 | internerr("unknown PKG_SPEC_ARCH_* flags %d in pkg_spec", | |
182 | ps->flags & PKG_SPEC_ARCH_MASK); | |
183 | } | |
184 | } | |
185 | ||
186 | bool | |
187 | pkg_spec_match_pkg(struct pkg_spec *ps, struct pkginfo *pkg, | |
188 | struct pkgbin *pkgbin) | |
189 | { | |
190 | return (pkg_spec_match_name(ps, pkg->set->name) && | |
191 | pkg_spec_match_arch(ps, pkg, pkgbin->arch)); | |
192 | } | |
193 | ||
194 | static struct pkginfo * | |
195 | pkg_spec_get_pkg(struct pkg_spec *ps) | |
196 | { | |
197 | if (ps->arch->type == DPKG_ARCH_NONE) | |
198 | return pkg_db_find_singleton(ps->name); | |
199 | else | |
200 | return pkg_db_find_pkg(ps->name, ps->arch); | |
201 | } | |
202 | ||
203 | struct pkginfo * | |
204 | pkg_spec_parse_pkg(const char *str, struct dpkg_error *err) | |
205 | { | |
206 | struct pkg_spec ps; | |
207 | struct pkginfo *pkg; | |
208 | const char *emsg; | |
209 | ||
210 | pkg_spec_init(&ps, PKG_SPEC_ARCH_SINGLE); | |
211 | emsg = pkg_spec_parse(&ps, str); | |
212 | if (emsg) { | |
213 | dpkg_put_error(err, "%s", emsg); | |
214 | pkg = NULL; | |
215 | } else { | |
216 | pkg = pkg_spec_get_pkg(&ps); | |
217 | } | |
218 | pkg_spec_destroy(&ps); | |
219 | ||
220 | return pkg; | |
221 | } | |
222 | ||
223 | struct pkginfo * | |
224 | pkg_spec_find_pkg(const char *pkgname, const char *archname, | |
225 | struct dpkg_error *err) | |
226 | { | |
227 | struct pkg_spec ps; | |
228 | struct pkginfo *pkg; | |
229 | const char *emsg; | |
230 | ||
231 | pkg_spec_init(&ps, PKG_SPEC_ARCH_SINGLE); | |
232 | emsg = pkg_spec_set(&ps, pkgname, archname); | |
233 | if (emsg) { | |
234 | dpkg_put_error(err, "%s", emsg); | |
235 | pkg = NULL; | |
236 | } else { | |
237 | pkg = pkg_spec_get_pkg(&ps); | |
238 | } | |
239 | pkg_spec_destroy(&ps); | |
240 | ||
241 | return pkg; | |
242 | } | |
243 | ||
244 | void | |
245 | pkg_spec_iter_init(struct pkg_spec *ps) | |
246 | { | |
247 | if (ps->name_is_pattern) | |
248 | ps->pkg_iter = pkg_db_iter_new(); | |
249 | else | |
250 | ps->pkg_next = &pkg_db_find_set(ps->name)->pkg; | |
251 | } | |
252 | ||
253 | static struct pkginfo * | |
254 | pkg_spec_iter_next_pkgname(struct pkg_spec *ps) | |
255 | { | |
256 | struct pkginfo *pkg; | |
257 | ||
258 | while ((pkg = pkg_db_iter_next_pkg(ps->pkg_iter))) { | |
259 | if (pkg_spec_match_pkg(ps, pkg, &pkg->installed)) | |
260 | return pkg; | |
261 | } | |
262 | ||
263 | return NULL; | |
264 | } | |
265 | ||
266 | static struct pkginfo * | |
267 | pkg_spec_iter_next_pkgarch(struct pkg_spec *ps) | |
268 | { | |
269 | struct pkginfo *pkg; | |
270 | ||
271 | while ((pkg = ps->pkg_next)) { | |
272 | ps->pkg_next = pkg->arch_next; | |
273 | ||
274 | if (pkg_spec_match_arch(ps, pkg, pkg->installed.arch)) | |
275 | return pkg; | |
276 | } | |
277 | ||
278 | return NULL; | |
279 | } | |
280 | ||
281 | struct pkginfo * | |
282 | pkg_spec_iter_next_pkg(struct pkg_spec *ps) | |
283 | { | |
284 | if (ps->name_is_pattern) | |
285 | return pkg_spec_iter_next_pkgname(ps); | |
286 | else | |
287 | return pkg_spec_iter_next_pkgarch(ps); | |
288 | } | |
289 | ||
290 | void | |
291 | pkg_spec_iter_destroy(struct pkg_spec *ps) | |
292 | { | |
293 | pkg_db_iter_free(ps->pkg_iter); | |
294 | pkg_spec_iter_blank(ps); | |
295 | } | |
296 | ||
297 | void | |
298 | pkg_spec_destroy(struct pkg_spec *ps) | |
299 | { | |
300 | free(ps->name); | |
301 | pkg_spec_blank(ps); | |
302 | pkg_spec_iter_destroy(ps); | |
303 | } |