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-rw-r--r--applets/busybox.c148
1 files changed, 148 insertions, 0 deletions
diff --git a/applets/busybox.c b/applets/busybox.c
new file mode 100644
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@@ -0,0 +1,148 @@
1/* vi: set sw=4 ts=4: */
2/*
3 * BusyBox' main applet dispatcher.
4 *
5 * Licensed under GPLv2, see file LICENSE in this tarball for details.
6 */
7#include "busybox.h"
8
9const char *applet_name ATTRIBUTE_EXTERNALLY_VISIBLE;
10
11#ifdef CONFIG_FEATURE_INSTALLER
12/*
13 * directory table
14 * this should be consistent w/ the enum, busybox.h::Location,
15 * or else...
16 */
17static const char usr_bin [] ="/usr/bin";
18static const char usr_sbin[] ="/usr/sbin";
19
20static const char* const install_dir[] = {
21 &usr_bin [8], /* "", equivalent to "/" for concat_path_file() */
22 &usr_bin [4], /* "/bin" */
23 &usr_sbin[4], /* "/sbin" */
24 usr_bin,
25 usr_sbin
26};
27
28/* abstract link() */
29typedef int (*__link_f)(const char *, const char *);
30
31/* create (sym)links for each applet */
32static void install_links(const char *busybox, int use_symbolic_links)
33{
34 __link_f Link = link;
35
36 char *fpc;
37 int i;
38 int rc;
39
40 if (use_symbolic_links)
41 Link = symlink;
42
43 for (i = 0; applets[i].name != NULL; i++) {
44 fpc = concat_path_file(
45 install_dir[applets[i].location], applets[i].name);
46 rc = Link(busybox, fpc);
47 if (rc!=0 && errno!=EEXIST) {
48 bb_perror_msg("%s", fpc);
49 }
50 free(fpc);
51 }
52}
53
54#else
55#define install_links(x,y)
56#endif /* CONFIG_FEATURE_INSTALLER */
57
58int main(int argc, char **argv)
59{
60 const char *s;
61
62 applet_name=argv[0];
63 if (*applet_name == '-') applet_name++;
64 for (s = applet_name; *s ;)
65 if (*(s++) == '/') applet_name = s;
66
67 /* Set locale for everybody except 'init' */
68 if (ENABLE_LOCALE_SUPPORT && getpid() != 1)
69 setlocale(LC_ALL, "");
70
71 run_applet_by_name(applet_name, argc, argv);
72 bb_error_msg_and_die("applet not found");
73}
74
75int busybox_main(int argc, char **argv)
76{
77 /*
78 * This style of argument parsing doesn't scale well
79 * in the event that busybox starts wanting more --options.
80 * If someone has a cleaner approach, by all means implement it.
81 */
82 if (ENABLE_FEATURE_INSTALLER && argc > 1 && !strcmp(argv[1], "--install")) {
83 int use_symbolic_links = 0;
84 int rc = 0;
85 char *busybox;
86
87 /* to use symlinks, or not to use symlinks... */
88 if (argc > 2) {
89 if ((strcmp(argv[2], "-s") == 0)) {
90 use_symbolic_links = 1;
91 }
92 }
93
94 /* link */
95// XXX: FIXME: this is broken. Why not just use argv[0] ?
96 busybox = xreadlink("/proc/self/exe");
97 if (busybox) {
98 install_links(busybox, use_symbolic_links);
99 free(busybox);
100 } else {
101 rc = 1;
102 }
103 return rc;
104 }
105
106 /* Deal with --help. (Also print help when called with no arguments) */
107
108 if (argc==1 || !strcmp(argv[1],"--help") ) {
109 if (argc>2) {
110 applet_name = argv[2];
111 run_applet_by_name(applet_name, 2, argv);
112 } else {
113 const struct BB_applet *a;
114 int col, output_width;
115
116 if (ENABLE_FEATURE_AUTOWIDTH) {
117 /* Obtain the terminal width. */
118 get_terminal_width_height(0, &output_width, NULL);
119 /* leading tab and room to wrap */
120 output_width -= sizeof("start-stop-daemon, ") + 8;
121 } else output_width = 80 - sizeof("start-stop-daemon, ") - 8;
122
123 printf("%s\n"
124 "Copyright (C) 1998-2006  Erik Andersen, Rob Landley, and others.\n"
125 "Licensed under GPLv2.  See source distribution for full notice.\n\n"
126 "Usage: busybox [function] [arguments]...\n"
127 " or: [function] [arguments]...\n\n"
128 "\tBusyBox is a multi-call binary that combines many common Unix\n"
129 "\tutilities into a single executable. Most people will create a\n"
130 "\tlink to busybox for each function they wish to use and BusyBox\n"
131 "\twill act like whatever it was invoked as!\n"
132 "\nCurrently defined functions:\n", bb_msg_full_version);
133
134 col=0;
135 for(a = applets; a->name;) {
136 col += printf("%s%s", (col ? ", " : "\t"), (a++)->name);
137 if (col > output_width && a->name) {
138 printf(",\n");
139 col = 0;
140 }
141 }
142 printf("\n\n");
143 exit(0);
144 }
145 } else run_applet_by_name(argv[1], argc-1, argv+1);
146
147 bb_error_msg_and_die("applet not found");
148}