projects / thirdparty / bash.git / blame
| Commit | Line | Data |
|---|---|---|
| ccc6cda3 JA |
1 | /* basename - return nondirectory portion of pathname */ |
| 2 | ||
| 3 | /* See Makefile for compilation details. */ | |
| 4 | ||
| 5 | #include "config.h" | |
| 6 | ||
| 7 | #if defined (HAVE_UNISTD_H) | |
| 8 | # include <unistd.h> | |
| 9 | #endif | |
| 10 | ||
| 11 | #include <stdio.h> | |
| 12 | #include "builtins.h" | |
| 13 | #include "shell.h" | |
| 3185942a | 14 | #include "common.h" |
| ccc6cda3 JA |
15 | |
| 16 | basename_builtin (list) | |
| 17 | WORD_LIST *list; | |
| 18 | { | |
| 19 | int slen, sufflen, off; | |
| 20 | char *string, *suffix, *fn; | |
| 21 | ||
| 22 | if (list == 0) | |
| 23 | { | |
| 24 | builtin_usage (); | |
| 25 | return (EX_USAGE); | |
| 26 | } | |
| 27 | ||
| 28 | if (no_options (list)) | |
| 29 | return (EX_USAGE); | |
| 30 | ||
| 31 | string = list->word->word; | |
| 32 | suffix = (char *)NULL; | |
| 33 | if (list->next) | |
| 34 | { | |
| 35 | list = list->next; | |
| 36 | suffix = list->word->word; | |
| 37 | } | |
| 38 | ||
| 39 | if (list->next) | |
| 40 | { | |
| 41 | builtin_usage (); | |
| 42 | return (EX_USAGE); | |
| 43 | } | |
| 44 | ||
| 45 | slen = strlen (string); | |
| 46 | ||
| 47 | /* Strip trailing slashes */ | |
| 48 | while (slen > 0 && string[slen - 1] == '/') | |
| 49 | slen--; | |
| 50 | ||
| 51 | /* (2) If string consists entirely of slash characters, string shall be | |
| 52 | set to a single slash character. In this case, skip steps (3) | |
| 53 | through (5). */ | |
| 54 | if (slen == 0) | |
| 55 | { | |
| 56 | fputs ("/\n", stdout); | |
| 57 | return (EXECUTION_SUCCESS); | |
| 58 | } | |
| 59 | ||
| 60 | /* (3) If there are any trailing slash characters in string, they | |
| 61 | shall be removed. */ | |
| 62 | string[slen] = '\0'; | |
| 63 | ||
| 64 | /* (4) If there are any slash characters remaining in string, the prefix | |
| 65 | of string up to an including the last slash character in string | |
| 66 | shall be removed. */ | |
| 67 | while (--slen >= 0) | |
| 68 | if (string[slen] == '/') | |
| 69 | break; | |
| 70 | ||
| 71 | fn = string + slen + 1; | |
| 72 | ||
| 73 | /* (5) If the suffix operand is present, is not identical to the | |
| 74 | characters remaining in string, and is identical to a suffix | |
| 75 | of the characters remaining in string, the suffix suffix | |
| 76 | shall be removed from string. Otherwise, string shall not be | |
| 77 | modified by this step. */ | |
| 78 | if (suffix) | |
| 79 | { | |
| 80 | sufflen = strlen (suffix); | |
| 81 | slen = strlen (fn); | |
| 82 | if (sufflen < slen) | |
| 83 | { | |
| 84 | off = slen - sufflen; | |
| 85 | if (strcmp (fn + off, suffix) == 0) | |
| 86 | fn[off] = '\0'; | |
| 87 | } | |
| 88 | } | |
| 89 | printf ("%s\n", fn); | |
| 90 | return (EXECUTION_SUCCESS); | |
| 91 | } | |
| 92 | ||
| 93 | char *basename_doc[] = { | |
| 3185942a JA |
94 | "Return non-directory portion of pathname.", |
| 95 | "", | |
| ccc6cda3 JA |
96 | "The STRING is converted to a filename corresponding to the last", |
| 97 | "pathname component in STRING. If the suffix string SUFFIX is", | |
| 98 | "supplied, it is removed.", | |
| 99 | (char *)NULL | |
| 100 | }; | |
| 101 | ||
| 102 | /* The standard structure describing a builtin command. bash keeps an array | |
| 103 | of these structures. */ | |
| 104 | struct builtin basename_struct = { | |
| 105 | "basename", /* builtin name */ | |
| 106 | basename_builtin, /* function implementing the builtin */ | |
| 107 | BUILTIN_ENABLED, /* initial flags for builtin */ | |
| 108 | basename_doc, /* array of long documentation strings. */ | |
| 109 | "basename string [suffix]", /* usage synopsis */ | |
| 110 | 0 /* reserved for internal use */ | |
| 111 | }; |