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Commit | Line | Data |
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ccc6cda3 JA |
1 | /* basename - return nondirectory portion of pathname */ |
2 | ||
3 | /* See Makefile for compilation details. */ | |
4 | ||
c7e43312 CR |
5 | /* |
6 | Copyright (C) 1999-2009 Free Software Foundation, Inc. | |
7 | ||
8 | This file is part of GNU Bash. | |
9 | Bash 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 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. | |
21 | */ | |
22 | ||
ccc6cda3 JA |
23 | #include "config.h" |
24 | ||
25 | #if defined (HAVE_UNISTD_H) | |
26 | # include <unistd.h> | |
27 | #endif | |
28 | ||
29 | #include <stdio.h> | |
30 | #include "builtins.h" | |
31 | #include "shell.h" | |
29f3080f | 32 | #include "common.h" |
ccc6cda3 | 33 | |
54a5fbe1 | 34 | int |
ccc6cda3 JA |
35 | basename_builtin (list) |
36 | WORD_LIST *list; | |
37 | { | |
38 | int slen, sufflen, off; | |
39 | char *string, *suffix, *fn; | |
40 | ||
41 | if (list == 0) | |
42 | { | |
43 | builtin_usage (); | |
44 | return (EX_USAGE); | |
45 | } | |
46 | ||
47 | if (no_options (list)) | |
48 | return (EX_USAGE); | |
49 | ||
50 | string = list->word->word; | |
51 | suffix = (char *)NULL; | |
52 | if (list->next) | |
53 | { | |
54 | list = list->next; | |
55 | suffix = list->word->word; | |
56 | } | |
57 | ||
58 | if (list->next) | |
59 | { | |
60 | builtin_usage (); | |
61 | return (EX_USAGE); | |
62 | } | |
63 | ||
64 | slen = strlen (string); | |
65 | ||
66 | /* Strip trailing slashes */ | |
67 | while (slen > 0 && string[slen - 1] == '/') | |
68 | slen--; | |
69 | ||
70 | /* (2) If string consists entirely of slash characters, string shall be | |
71 | set to a single slash character. In this case, skip steps (3) | |
72 | through (5). */ | |
73 | if (slen == 0) | |
74 | { | |
75 | fputs ("/\n", stdout); | |
76 | return (EXECUTION_SUCCESS); | |
77 | } | |
78 | ||
79 | /* (3) If there are any trailing slash characters in string, they | |
80 | shall be removed. */ | |
81 | string[slen] = '\0'; | |
82 | ||
83 | /* (4) If there are any slash characters remaining in string, the prefix | |
84 | of string up to an including the last slash character in string | |
85 | shall be removed. */ | |
86 | while (--slen >= 0) | |
87 | if (string[slen] == '/') | |
88 | break; | |
89 | ||
90 | fn = string + slen + 1; | |
91 | ||
92 | /* (5) If the suffix operand is present, is not identical to the | |
93 | characters remaining in string, and is identical to a suffix | |
94 | of the characters remaining in string, the suffix suffix | |
95 | shall be removed from string. Otherwise, string shall not be | |
96 | modified by this step. */ | |
97 | if (suffix) | |
98 | { | |
99 | sufflen = strlen (suffix); | |
100 | slen = strlen (fn); | |
101 | if (sufflen < slen) | |
102 | { | |
103 | off = slen - sufflen; | |
104 | if (strcmp (fn + off, suffix) == 0) | |
105 | fn[off] = '\0'; | |
106 | } | |
107 | } | |
108 | printf ("%s\n", fn); | |
109 | return (EXECUTION_SUCCESS); | |
110 | } | |
111 | ||
112 | char *basename_doc[] = { | |
6a8fd0ed CR |
113 | "Return non-directory portion of pathname.", |
114 | "", | |
ccc6cda3 JA |
115 | "The STRING is converted to a filename corresponding to the last", |
116 | "pathname component in STRING. If the suffix string SUFFIX is", | |
117 | "supplied, it is removed.", | |
118 | (char *)NULL | |
119 | }; | |
120 | ||
121 | /* The standard structure describing a builtin command. bash keeps an array | |
122 | of these structures. */ | |
123 | struct builtin basename_struct = { | |
124 | "basename", /* builtin name */ | |
125 | basename_builtin, /* function implementing the builtin */ | |
126 | BUILTIN_ENABLED, /* initial flags for builtin */ | |
127 | basename_doc, /* array of long documentation strings. */ | |
128 | "basename string [suffix]", /* usage synopsis */ | |
129 | 0 /* reserved for internal use */ | |
130 | }; |