X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=applets%2Fbusybox.c;h=833e8d37292ccb8fa603aa43d311182692a256b8;hb=f51d2069ff3a38be49a86212e1d62f2fd89c5943;hp=41b6069edb79bc0b4d4251296fc90044dd5eb5dc;hpb=28355a36da6ad4d1b55ba9bb146fb0b6586e7edb;p=oweals%2Fbusybox.git diff --git a/applets/busybox.c b/applets/busybox.c index 41b6069ed..833e8d372 100644 --- a/applets/busybox.c +++ b/applets/busybox.c @@ -5,41 +5,34 @@ #include #include #include "busybox.h" -#ifdef BB_LOCALE_SUPPORT +#if ENABLE_LOCALE_SUPPORT #include +#else +#define setlocale(x,y) #endif -int been_there_done_that = 0; /* Also used in applets.c */ -const char *applet_name; +const char *bb_applet_name; -#ifdef BB_FEATURE_INSTALLER -/* +#ifdef CONFIG_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", +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 *); -/* - * 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) { @@ -49,7 +42,7 @@ static void install_links(const char *busybox, int use_symbolic_links) int i; int rc; - if (use_symbolic_links) + if (use_symbolic_links) Link = symlink; for (i = 0; applets[i].name != NULL; i++) { @@ -57,65 +50,54 @@ static void install_links(const char *busybox, int use_symbolic_links) install_dir[applets[i].location], applets[i].name); rc = Link(busybox, fpc); if (rc!=0 && errno!=EEXIST) { - perror_msg("%s", fpc); + bb_perror_msg("%s", fpc); } free(fpc); } } -#endif /* BB_FEATURE_INSTALLER */ +#else +#define install_links(x,y) +#endif /* CONFIG_FEATURE_INSTALLER */ int main(int argc, char **argv) { const char *s; - for (s = applet_name = argv[0]; *s != '\0';) { - if (*s++ == '/') - applet_name = s; - } - -#ifdef BB_SH - /* Add in a special case hack -- whenever **argv == '-' - * (i.e. '-su' or '-sh') always invoke the shell */ - if (**argv == '-' && *(*argv+1)!= '-') { - applet_name = "sh"; - } -#endif + bb_applet_name=argv[0]; + if (*bb_applet_name == '-') bb_applet_name++; + for (s = bb_applet_name; *s ;) + if (*(s++) == '/') bb_applet_name = s; -#ifdef BB_LOCALE_SUPPORT - if(getpid()!=1) /* Do not set locale for `init' */ + /* Set locale for everybody except `init' */ + if(ENABLE_LOCALE_SUPPORT && (!ENABLE_INIT || getpid()==1)) setlocale(LC_ALL, ""); -#endif - run_applet_by_name(applet_name, argc, argv); - error_msg_and_die("applet not found"); + run_applet_by_name(bb_applet_name, argc, argv); + bb_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 + /* + * 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)) { + 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; + if ((strcmp(argv[2], "-s") == 0)) { + use_symbolic_links = 1; } } /* link */ - busybox = busybox_fullpath(); + busybox = xreadlink("/proc/self/exe"); if (busybox) { install_links(busybox, use_symbolic_links); free(busybox); @@ -124,51 +106,46 @@ int busybox_main(int argc, char **argv) } 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; + + /* 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], 2, 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); } - fprintf(stderr, "\n\n"); - exit(0); - } - - /* Flag that we've been here already */ - been_there_done_that = 1; + } else run_applet_by_name(bb_applet_name=argv[1], argc-1, argv+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)); + bb_error_msg_and_die("applet not found"); } /*