2 * Copyright (c) 2008 Joerg Sonnenberger
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include "bsdtar_platform.h"
27 __FBSDID("$FreeBSD: src/usr.bin/tar/subst.c,v 1.4 2008/06/15 10:08:16 kientzle Exp $");
42 struct subst_rule *next;
45 unsigned int global:1, print:1, symlink:1;
49 struct subst_rule *first_rule, *last_rule;
53 init_substitution(struct bsdtar *bsdtar)
55 struct substitution *subst;
57 bsdtar->substitution = subst = malloc(sizeof(*subst));
59 bsdtar_errc(bsdtar, 1, errno, "Out of memory");
60 subst->first_rule = subst->last_rule = NULL;
64 add_substitution(struct bsdtar *bsdtar, const char *rule_text)
66 struct subst_rule *rule;
67 struct substitution *subst;
68 const char *end_pattern, *start_subst;
72 if ((subst = bsdtar->substitution) == NULL) {
73 init_substitution(bsdtar);
74 subst = bsdtar->substitution;
77 rule = malloc(sizeof(*rule));
79 bsdtar_errc(bsdtar, 1, errno, "Out of memory");
82 if (subst->last_rule == NULL)
83 subst->first_rule = rule;
85 subst->last_rule->next = rule;
86 subst->last_rule = rule;
88 if (*rule_text == '\0')
89 bsdtar_errc(bsdtar, 1, 0, "Empty replacement string");
90 end_pattern = strchr(rule_text + 1, *rule_text);
91 if (end_pattern == NULL)
92 bsdtar_errc(bsdtar, 1, 0, "Invalid replacement string");
94 pattern = malloc(end_pattern - rule_text);
96 bsdtar_errc(bsdtar, 1, errno, "Out of memory");
97 memcpy(pattern, rule_text + 1, end_pattern - rule_text - 1);
98 pattern[end_pattern - rule_text - 1] = '\0';
100 if ((r = regcomp(&rule->re, pattern, REG_BASIC)) != 0) {
102 regerror(r, &rule->re, buf, sizeof(buf));
103 bsdtar_errc(bsdtar, 1, 0, "Invalid regular expression: %s", buf);
107 start_subst = end_pattern + 1;
108 end_pattern = strchr(start_subst, *rule_text);
109 if (end_pattern == NULL)
110 bsdtar_errc(bsdtar, 1, 0, "Invalid replacement string");
112 rule->result = malloc(end_pattern - start_subst + 1);
113 if (rule->result == NULL)
114 bsdtar_errc(bsdtar, 1, errno, "Out of memory");
115 memcpy(rule->result, start_subst, end_pattern - start_subst);
116 rule->result[end_pattern - start_subst] = '\0';
122 while (*++end_pattern) {
123 switch (*end_pattern) {
137 bsdtar_errc(bsdtar, 1, 0, "Invalid replacement flag %c", *end_pattern);
143 realloc_strncat(struct bsdtar *bsdtar, char **str, const char *append, size_t len)
151 old_len = strlen(*str);
153 new_str = malloc(old_len + len + 1);
155 bsdtar_errc(bsdtar, 1, errno, "Out of memory");
156 memcpy(new_str, *str, old_len);
157 memcpy(new_str + old_len, append, len);
158 new_str[old_len + len] = '\0';
164 realloc_strcat(struct bsdtar *bsdtar, char **str, const char *append)
172 old_len = strlen(*str);
174 new_str = malloc(old_len + strlen(append) + 1);
176 bsdtar_errc(bsdtar, 1, errno, "Out of memory");
177 memcpy(new_str, *str, old_len);
178 strcpy(new_str + old_len, append);
184 apply_substitution(struct bsdtar *bsdtar, const char *name, char **result, int symlink_only)
186 const char *path = name;
187 regmatch_t matches[10];
189 struct subst_rule *rule;
190 struct substitution *subst;
191 int c, got_match, print_match;
195 if ((subst = bsdtar->substitution) == NULL)
201 for (rule = subst->first_rule; rule != NULL; rule = rule->next) {
202 if (symlink_only && !rule->symlink)
204 if (regexec(&rule->re, name, 10, matches, 0))
208 print_match |= rule->print;
209 realloc_strncat(bsdtar, result, name, matches[0].rm_so);
211 for (i = 0, j = 0; rule->result[i] != '\0'; ++i) {
212 if (rule->result[i] == '~') {
213 realloc_strncat(bsdtar, result, rule->result + j, i - j);
214 realloc_strncat(bsdtar, result, name, matches[0].rm_eo);
218 if (rule->result[i] != '\\')
226 realloc_strncat(bsdtar, result, rule->result + j, i - j - 1);
238 realloc_strncat(bsdtar, result, rule->result + j, i - j - 1);
239 if ((size_t)(c - '0') > (size_t)(rule->re.re_nsub)) {
244 realloc_strncat(bsdtar, result, name + matches[c - '0'].rm_so, matches[c - '0'].rm_eo - matches[c - '0'].rm_so);
254 realloc_strcat(bsdtar, result, rule->result + j);
256 name += matches[0].rm_eo;
263 realloc_strcat(bsdtar, result, name);
266 fprintf(stderr, "%s >> %s\n", path, *result);
272 cleanup_substitution(struct bsdtar *bsdtar)
274 struct subst_rule *rule;
275 struct substitution *subst;
277 if ((subst = bsdtar->substitution) == NULL)
280 while ((rule = subst->first_rule) != NULL) {
281 subst->first_rule = rule->next;
287 #endif /* HAVE_REGEX_H */