busybox/applets/busybox.c
Rob Landley 8a7a678b03 Fixes so "make allnoconfig" works again.
The configure system's save function edited out sub-menus that wouldn't be
displayed in the current configuration, meaning config.h wouldn't have #udef
entries for those symbols, meaning bb_config.h would have the relevant
ENABLE_ missing instead of defined to 0.  This broke the build.

So I fixed it, and then reorganized the applets.c and busybox.c to take
away the warnings this revealed (code that would be optimized out was making
calls to functions that hadn't been prototyped.  So I added an #else case
to those #ifdefs to #define the relevant functions to empty macros to
placate the warnings.

I also reorganized the applets.c code to make adding such an #else case less
of a pain (and make the need for prototyping go away by moving the functions
up before they were used, and generally wind up with fewer #ifdefs in
the code by putting all the logic in one place).  This resulted in a huge
seeming patch, when most if it just moves code from one place to another
without touching it...

Upside: make allyesconfig and make allnoconfig should both work now.
2005-09-05 04:13:33 +00:00

157 lines
3.7 KiB
C

/* vi: set sw=4 ts=4: */
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include "busybox.h"
#if ENABLE_LOCALE_SUPPORT
#include <locale.h>
#else
#define setlocale(x,y)
#endif
const char *bb_applet_name;
#ifdef CONFIG_FEATURE_INSTALLER
/*
* directory table
* this should be consistent w/ the enum, busybox.h::Location,
* or else...
*/
static const char usr_bin [] ="/usr/bin";
static const char usr_sbin[] ="/usr/sbin";
static const char* const install_dir[] = {
&usr_bin [8], /* "", equivalent to "/" for concat_path_file() */
&usr_bin [4], /* "/bin" */
&usr_sbin[4], /* "/sbin" */
usr_bin,
usr_sbin
};
/* abstract link() */
typedef int (*__link_f)(const char *, const char *);
/* create (sym)links for each applet */
static void install_links(const char *busybox, int use_symbolic_links)
{
__link_f Link = link;
char *fpc;
int i;
int rc;
if (use_symbolic_links)
Link = symlink;
for (i = 0; applets[i].name != NULL; i++) {
fpc = concat_path_file(
install_dir[applets[i].location], applets[i].name);
rc = Link(busybox, fpc);
if (rc!=0 && errno!=EEXIST) {
bb_perror_msg("%s", fpc);
}
free(fpc);
}
}
#else
#define install_links(x,y)
#endif /* CONFIG_FEATURE_INSTALLER */
int main(int argc, char **argv)
{
const char *s;
bb_applet_name=argv[0];
if (*bb_applet_name == '-') bb_applet_name++;
for (s = bb_applet_name; *s ;)
if (*(s++) == '/') bb_applet_name = s;
/* Set locale for everybody except `init' */
if(ENABLE_LOCALE_SUPPORT && (!ENABLE_INIT || getpid()==1))
setlocale(LC_ALL, "");
run_applet_by_name(bb_applet_name, argc, argv);
bb_error_msg_and_die("applet not found");
}
int busybox_main(int argc, char **argv)
{
/*
* This style of argument parsing doesn't scale well
* in the event that busybox starts wanting more --options.
* If someone has a cleaner approach, by all means implement it.
*/
if (ENABLE_FEATURE_INSTALLER && argc > 1 && !strcmp(argv[1], "--install")) {
int use_symbolic_links = 0;
int rc = 0;
char *busybox;
/* to use symlinks, or not to use symlinks... */
if (argc > 2) {
if ((strcmp(argv[2], "-s") == 0)) {
use_symbolic_links = 1;
}
}
/* link */
busybox = xreadlink("/proc/self/exe");
if (busybox) {
install_links(busybox, use_symbolic_links);
free(busybox);
} else {
rc = 1;
}
return rc;
}
/* Deal with --help. (Also print help when called with no arguments) */
if (argc==1 || !strcmp(argv[1],"--help") ) {
if (argc>2) run_applet_by_name(bb_applet_name=argv[2], argc, argv);
else {
const struct BB_applet *a;
int col, output_width;
if (ENABLE_FEATURE_AUTOWIDTH) {
/* Obtain the terminal width. */
get_terminal_width_height(0, &output_width, NULL);
/* leading tab and room to wrap */
output_width -= 20;
} else output_width = 60;
printf("%s\n\n"
"Usage: busybox [function] [arguments]...\n"
" or: [function] [arguments]...\n\n"
"\tBusyBox is a multi-call binary that combines many common Unix\n"
"\tutilities into a single executable. Most people will create a\n"
"\tlink to busybox for each function they wish to use and BusyBox\n"
"\twill act like whatever it was invoked as!\n"
"\nCurrently defined functions:\n", bb_msg_full_version);
col=0;
for(a = applets; a->name;) {
col += printf("%s%s", (col ? ", " : "\t"), (a++)->name);
if (col > output_width && a->name) {
printf(",\n");
col = 0;
}
}
printf("\n\n");
exit(0);
}
} else run_applet_by_name(bb_applet_name=argv[1], argc-1, argv+1);
bb_error_msg_and_die("applet not found");
}
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/