diff options
Diffstat (limited to 'release/src/router/busybox/busybox.c')
-rw-r--r-- | release/src/router/busybox/busybox.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/release/src/router/busybox/busybox.c b/release/src/router/busybox/busybox.c new file mode 100644 index 00000000..7a220f7b --- /dev/null +++ b/release/src/router/busybox/busybox.c @@ -0,0 +1,181 @@ +/* vi: set sw=4 ts=4: */ +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> +#include <stdlib.h> +#include "busybox.h" +#ifdef BB_LOCALE_SUPPORT +#include <locale.h> +#endif + +int been_there_done_that = 0; /* Also used in applets.c */ +const char *applet_name; + +#ifdef BB_FEATURE_INSTALLER +/* + * directory table + * this should be consistent w/ the enum, busybox.h::Location, + * or else... + */ +static char* install_dir[] = { + "/", + "/bin", + "/sbin", + "/usr/bin", + "/usr/sbin", +}; + +/* abstract link() */ +typedef int (*__link_f)(const char *, const char *); + +/* + * Where in the filesystem is this busybox? + * [return] + * malloc'd string w/ full pathname of busybox's location + * NULL on failure + */ +static char *busybox_fullpath() +{ + return xreadlink("/proc/self/exe"); +} + +/* 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) { + perror_msg("%s", fpc); + } + free(fpc); + } +} + +#endif /* BB_FEATURE_INSTALLER */ + +int main(int argc, char **argv) +{ + const char *s; + + for (s = applet_name = argv[0]; *s != '\0';) { + if (*s++ == '/') + applet_name = s; + } + + /* Add in a special case hack for a leading hyphen */ + if (**argv == '-' && *(*argv+1)!= '-') { + applet_name = (*argv+1); + } + +#ifdef BB_LOCALE_SUPPORT +#ifdef BB_INIT + if(getpid()!=1) /* Do not set locale for `init' */ +#endif + { + setlocale(LC_ALL, ""); + } +#endif + + run_applet_by_name(applet_name, argc, argv); + error_msg_and_die("applet not found"); +} + + +int busybox_main(int argc, char **argv) +{ + int col = 0, len, i; + +#ifdef BB_FEATURE_INSTALLER + /* + * 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 (argc > 1 && (strcmp(argv[1], "--install") == 0)) { + 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 = busybox_fullpath(); + if (busybox) { + install_links(busybox, use_symbolic_links); + free(busybox); + } else { + rc = 1; + } + return rc; + } +#endif /* BB_FEATURE_INSTALLER */ + + argc--; + + /* If we've already been here once, exit now */ + if (been_there_done_that == 1 || argc < 1) { + const struct BB_applet *a = applets; + + fprintf(stderr, "%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", full_version); + + while (a->name != 0) { + col += + fprintf(stderr, "%s%s", ((col == 0) ? "\t" : ", "), + (a++)->name); + if (col > 60 && a->name != 0) { + fprintf(stderr, ",\n"); + col = 0; + } + } + fprintf(stderr, "\n\n"); + exit(0); + } + + /* Flag that we've been here already */ + been_there_done_that = 1; + + /* Move the command line down a notch */ + len = argv[argc] + strlen(argv[argc]) - argv[1]; + memmove(argv[0], argv[1], len); + memset(argv[0] + len, 0, argv[1] - argv[0]); + + /* Fix up the argv pointers */ + len = argv[1] - argv[0]; + memmove(argv, argv + 1, sizeof(char *) * (argc + 1)); + for (i = 0; i < argc; i++) + argv[i] -= len; + + return (main(argc, argv)); +} + +/* +Local Variables: +c-file-style: "linux" +c-basic-offset: 4 +tab-width: 4 +End: +*/ |