1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config WHICH
//config: bool "which (3.8 kb)"
//config: default y
//config: help
//config: which is used to find programs in your PATH and
//config: print out their pathnames.
// NOTE: For WIN32 this applet is NOEXEC as file_is_win32_exe() and
// find_executable() both allocate memory.
//applet:IF_PLATFORM_MINGW32(IF_WHICH(APPLET_NOEXEC(which, which, BB_DIR_USR_BIN, BB_SUID_DROP, which)))
//applet:IF_PLATFORM_POSIX(IF_WHICH(APPLET_NOFORK(which, which, BB_DIR_USR_BIN, BB_SUID_DROP, which)))
//kbuild:lib-$(CONFIG_WHICH) += which.o
//usage:#define which_trivial_usage
//usage: "[-a] COMMAND..."
//usage:#define which_full_usage "\n\n"
//usage: "Locate COMMAND\n"
//usage: "\n -a Show all matches"
//usage:
//usage:#define which_example_usage
//usage: "$ which login\n"
//usage: "/bin/login\n"
#include "libbb.h"
#if ENABLE_PLATFORM_MINGW32 && ENABLE_FEATURE_SH_STANDALONE
enum {
OPT_a = (1 << 0),
OPT_s = (1 << 1)
};
#endif
int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int which_main(int argc UNUSED_PARAM, char **argv)
{
char *env_path;
int status = 0;
/* This sizeof(): bb_default_root_path is shorter than BB_PATH_ROOT_PATH */
char buf[sizeof(BB_PATH_ROOT_PATH)];
#if ENABLE_PLATFORM_MINGW32 && ENABLE_FEATURE_SH_STANDALONE
int sh_standalone;
#endif
env_path = getenv("PATH");
if (!env_path)
/* env_path must be writable, and must not alloc, so... */
env_path = strcpy(buf, bb_default_root_path);
#if ENABLE_PLATFORM_MINGW32 && ENABLE_FEATURE_SH_STANDALONE
/* '-s' option indicates we were run from a standalone shell */
getopt32(argv, "^" "as" "\0" "-1"/*at least one arg*/);
sh_standalone = option_mask32 & OPT_s;
option_mask32 &= ~OPT_s;
#else
getopt32(argv, "^" "a" "\0" "-1"/*at least one arg*/);
#endif
argv += optind;
do {
int missing = 1;
#if ENABLE_PLATFORM_MINGW32 && ENABLE_FEATURE_SH_STANDALONE
if (sh_standalone && find_applet_by_name(*argv) >= 0) {
missing = 0;
puts(applet_to_exe(*argv));
if (!option_mask32) /* -a not set */
break;
}
#endif
#if !ENABLE_PLATFORM_MINGW32
/* If file contains a slash don't use PATH */
if (strchr(*argv, '/')) {
if (file_is_executable(*argv)) {
missing = 0;
puts(*argv);
}
#else
if (has_path(*argv)) {
char *path = file_is_win32_exe(*argv);
if (path) {
missing = 0;
puts(bs_to_slash(path));
}
else if (unix_path(*argv)) {
const char *name = bb_basename(*argv);
# if ENABLE_FEATURE_SH_STANDALONE
if (sh_standalone && find_applet_by_name(name) >= 0) {
missing = 0;
puts(name);
} else
# endif
{
argv[0] = (char *)name;
goto try_PATH;
}
}
#endif
} else {
char *path;
char *p;
#if ENABLE_PLATFORM_MINGW32
try_PATH:
#endif
path = env_path;
/* NOFORK NB: xmalloc inside find_executable(), must have no allocs above! */
while ((p = find_executable(*argv, &path)) != NULL) {
missing = 0;
#if ENABLE_PLATFORM_MINGW32
puts(bs_to_slash(p));
#else
puts(p);
#endif
free(p);
if (!option_mask32) /* -a not set */
break;
}
}
status |= missing;
} while (*++argv);
return status;
}
|
