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726f6388 JA |
1 | /* bracecomp.c -- Complete a filename with the possible completions enclosed |
2 | in csh-style braces such that the list of completions is available to the | |
3 | shell. */ | |
4 | ||
5 | /* Original version by tromey@cns.caltech.edu, Fri Feb 7 1992. */ | |
6 | ||
81e3a4fb | 7 | /* Copyright (C) 1993-2020,2022 Free Software Foundation, Inc. |
726f6388 JA |
8 | |
9 | This file is part of GNU Bash, the Bourne Again SHell. | |
10 | ||
2e4498b3 CR |
11 | Bash is free software: you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation, either version 3 of the License, or | |
14 | (at your option) any later version. | |
726f6388 | 15 | |
2e4498b3 CR |
16 | Bash is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
726f6388 | 20 | |
2e4498b3 CR |
21 | You should have received a copy of the GNU General Public License |
22 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
23 | */ | |
726f6388 | 24 | |
ccc6cda3 | 25 | #include "config.h" |
2e4498b3 | 26 | |
ccc6cda3 JA |
27 | #if defined (BRACE_EXPANSION) && defined (READLINE) |
28 | ||
726f6388 JA |
29 | #include <stdio.h> |
30 | ||
ccc6cda3 | 31 | #if defined (HAVE_UNISTD_H) |
cce855bc JA |
32 | # ifdef _MINIX |
33 | # include <sys/types.h> | |
34 | # endif | |
ccc6cda3 JA |
35 | # include <unistd.h> |
36 | #endif | |
37 | ||
d166f048 | 38 | #include "bashansi.h" |
d356441f | 39 | #include "shmbutil.h" |
726f6388 JA |
40 | |
41 | #include "shell.h" | |
42 | #include <readline/readline.h> | |
43 | ||
81e3a4fb | 44 | static int _strcompare (const char **, const char **); |
d356441f | 45 | |
726f6388 JA |
46 | /* Find greatest common prefix of two strings. */ |
47 | static int | |
81e3a4fb | 48 | string_gcd (char *s1, char *s2) |
726f6388 JA |
49 | { |
50 | register int i; | |
51 | ||
52 | if (s1 == NULL || s2 == NULL) | |
53 | return (0); | |
54 | ||
55 | for (i = 0; *s1 && *s2; ++s1, ++s2, ++i) | |
56 | { | |
57 | if (*s1 != *s2) | |
58 | break; | |
59 | } | |
60 | ||
61 | return (i); | |
62 | } | |
63 | ||
64 | static char * | |
81e3a4fb | 65 | really_munge_braces (char **array, int real_start, int real_end, int gcd_zero) |
726f6388 JA |
66 | { |
67 | int start, end, gcd; | |
e8ce775d | 68 | char *result, *subterm, *x; |
8fd8cd8f CR |
69 | size_t result_size; |
70 | int flag, tlen; | |
726f6388 JA |
71 | |
72 | flag = 0; | |
73 | ||
74 | if (real_start == real_end) | |
75 | { | |
8360b906 CR |
76 | x = array[real_start] ? sh_backslash_quote (array[real_start] + gcd_zero, 0, 0) |
77 | : sh_backslash_quote (array[0], 0, 0); | |
e8ce775d | 78 | return x; |
726f6388 JA |
79 | } |
80 | ||
f73dda09 | 81 | result = (char *)xmalloc (result_size = 16); |
726f6388 JA |
82 | *result = '\0'; |
83 | ||
84 | for (start = real_start; start < real_end; start = end + 1) | |
85 | { | |
86 | gcd = strlen (array[start]); | |
87 | for (end = start + 1; end < real_end; end++) | |
88 | { | |
89 | int temp; | |
90 | ||
91 | temp = string_gcd (array[start], array[end]); | |
92 | ||
93 | if (temp <= gcd_zero) | |
94 | break; | |
95 | ||
96 | gcd = temp; | |
97 | } | |
98 | end--; | |
99 | ||
100 | if (gcd_zero == 0 && start == real_start && end != (real_end - 1)) | |
101 | { | |
102 | /* In this case, add in a leading '{', because we are at | |
103 | top level, and there isn't a consistent prefix. */ | |
104 | result_size += 1; | |
f73dda09 | 105 | result = (char *)xrealloc (result, result_size); |
d166f048 | 106 | result[0] = '{'; result[1] = '\0'; |
726f6388 JA |
107 | flag++; |
108 | } | |
109 | ||
e8ce775d JA |
110 | /* Make sure we backslash quote every substring we insert into the |
111 | resultant brace expression. This is so the default filename | |
112 | quoting function won't inappropriately quote the braces. */ | |
726f6388 | 113 | if (start == end) |
e8ce775d JA |
114 | { |
115 | x = savestring (array[start] + gcd_zero); | |
8360b906 | 116 | subterm = sh_backslash_quote (x, 0, 0); |
e8ce775d JA |
117 | free (x); |
118 | } | |
726f6388 JA |
119 | else |
120 | { | |
121 | /* If there is more than one element in the subarray, | |
e8ce775d JA |
122 | insert the (quoted) prefix and an opening brace. */ |
123 | tlen = gcd - gcd_zero; | |
f73dda09 | 124 | x = (char *)xmalloc (tlen + 1); |
e8ce775d JA |
125 | strncpy (x, array[start] + gcd_zero, tlen); |
126 | x[tlen] = '\0'; | |
8360b906 | 127 | subterm = sh_backslash_quote (x, 0, 0); |
e8ce775d JA |
128 | free (x); |
129 | result_size += strlen (subterm) + 1; | |
f73dda09 | 130 | result = (char *)xrealloc (result, result_size); |
e8ce775d JA |
131 | strcat (result, subterm); |
132 | free (subterm); | |
726f6388 JA |
133 | strcat (result, "{"); |
134 | subterm = really_munge_braces (array, start, end + 1, gcd); | |
135 | subterm[strlen (subterm) - 1] = '}'; | |
136 | } | |
137 | ||
138 | result_size += strlen (subterm) + 1; | |
f73dda09 | 139 | result = (char *)xrealloc (result, result_size); |
726f6388 JA |
140 | strcat (result, subterm); |
141 | strcat (result, ","); | |
142 | free (subterm); | |
143 | } | |
144 | ||
145 | if (gcd_zero == 0) | |
146 | result[strlen (result) - 1] = flag ? '}' : '\0'; | |
147 | return (result); | |
148 | } | |
149 | ||
d356441f | 150 | static int |
81e3a4fb | 151 | _strcompare (const char **s1, const char **s2) |
d356441f CR |
152 | { |
153 | int result; | |
154 | ||
155 | result = **s1 - **s2; | |
156 | if (result == 0) | |
157 | result = strcmp (*s1, *s2); | |
158 | ||
159 | return result; | |
160 | } | |
161 | ||
28ef6c31 | 162 | static int |
81e3a4fb | 163 | hack_braces_completion (char **names) |
726f6388 JA |
164 | { |
165 | register int i; | |
166 | char *temp; | |
167 | ||
d356441f CR |
168 | i = strvec_len (names); |
169 | if (MB_CUR_MAX > 1 && i > 2) | |
170 | qsort (names+1, i-1, sizeof (char *), (QSFUNC *)_strcompare); | |
171 | ||
172 | temp = really_munge_braces (names, 1, i, 0); | |
726f6388 JA |
173 | |
174 | for (i = 0; names[i]; ++i) | |
175 | { | |
176 | free (names[i]); | |
177 | names[i] = NULL; | |
178 | } | |
179 | names[0] = temp; | |
28ef6c31 | 180 | return 0; |
726f6388 JA |
181 | } |
182 | ||
e8ce775d JA |
183 | /* We handle quoting ourselves within hack_braces_completion, so we turn off |
184 | rl_filename_quoting_desired and rl_filename_quoting_function. */ | |
28ef6c31 | 185 | int |
81e3a4fb | 186 | bash_brace_completion (int count, int ignore) |
726f6388 | 187 | { |
28ef6c31 JA |
188 | rl_compignore_func_t *orig_ignore_func; |
189 | rl_compentry_func_t *orig_entry_func; | |
190 | rl_quote_func_t *orig_quoting_func; | |
191 | rl_completion_func_t *orig_attempt_func; | |
192 | int orig_quoting_desired, r; | |
726f6388 JA |
193 | |
194 | orig_ignore_func = rl_ignore_some_completions_function; | |
195 | orig_attempt_func = rl_attempted_completion_function; | |
196 | orig_entry_func = rl_completion_entry_function; | |
e8ce775d JA |
197 | orig_quoting_func = rl_filename_quoting_function; |
198 | orig_quoting_desired = rl_filename_quoting_desired; | |
726f6388 | 199 | |
28ef6c31 JA |
200 | rl_completion_entry_function = rl_filename_completion_function; |
201 | rl_attempted_completion_function = (rl_completion_func_t *)NULL; | |
202 | rl_ignore_some_completions_function = hack_braces_completion; | |
203 | rl_filename_quoting_function = (rl_quote_func_t *)NULL; | |
e8ce775d | 204 | rl_filename_quoting_desired = 0; |
726f6388 | 205 | |
28ef6c31 | 206 | r = rl_complete_internal (TAB); |
726f6388 JA |
207 | |
208 | rl_ignore_some_completions_function = orig_ignore_func; | |
209 | rl_attempted_completion_function = orig_attempt_func; | |
210 | rl_completion_entry_function = orig_entry_func; | |
e8ce775d JA |
211 | rl_filename_quoting_function = orig_quoting_func; |
212 | rl_filename_quoting_desired = orig_quoting_desired; | |
28ef6c31 JA |
213 | |
214 | return r; | |
726f6388 | 215 | } |
ccc6cda3 | 216 | #endif /* BRACE_EXPANSION && READLINE */ |