diff options
| -rw-r--r-- | modutils/modinfo.c | 114 |
1 files changed, 62 insertions, 52 deletions
diff --git a/modutils/modinfo.c b/modutils/modinfo.c index 8e74b64..aa641ad 100644 --- a/modutils/modinfo.c +++ b/modutils/modinfo.c @@ -5,11 +5,6 @@ * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ - -//applet:IF_MODINFO(APPLET(modinfo, BB_DIR_SBIN, BB_SUID_DROP)) - -//kbuild:lib-$(CONFIG_MODINFO) += modinfo.o modutils.o - //config:config MODINFO //config: bool "modinfo" //config: default y @@ -17,26 +12,46 @@ //config: help //config: Show information about a Linux Kernel module +//applet:IF_MODINFO(APPLET(modinfo, BB_DIR_SBIN, BB_SUID_DROP)) + +//kbuild:lib-$(CONFIG_MODINFO) += modinfo.o modutils.o + #include <fnmatch.h> #include <sys/utsname.h> /* uname() */ #include "libbb.h" #include "modutils.h" - -enum { - OPT_TAGS = (1 << 12) - 1, /* shortcut count */ - OPT_F = (1 << 12), /* field name */ - OPT_0 = (1 << 13), /* \0 as separator */ +static const char *const shortcuts[] = { + "filename", // -n + "author", // -a + "description", // -d + "license", // -l + "parm", // -p + "version", // the rest has no shortcut options + "alias", + "srcversion", + "depends", + "uts_release", + "intree", + "vermagic", + "firmware", }; -struct modinfo_env { - char *field; - int tags; +enum { + OPT_0 = (1 << 0), /* \0 as separator */ + OPT_F = (1 << 1), /* field name */ + /* first bits are for -nadlp options, the rest are for + * fields not selectable with "shortcut" options + */ + OPT_n = (1 << 2), + OPT_TAGS = ((1 << ARRAY_SIZE(shortcuts)) - 1) << 2, }; -static void display(const char *data, const char *pattern, int flag) +static void display(const char *data, const char *pattern) { - if (flag) { + int flag = option_mask32 >> 1; /* shift out -0 bit */ + if (flag & (flag-1)) { + /* more than one field to show: print "FIELD:" pfx */ int n = printf("%s:", pattern); while (n++ < 16) bb_putchar(' '); @@ -45,55 +60,45 @@ static void display(const char *data, const char *pattern, int flag) } static void modinfo(const char *path, const char *version, - const struct modinfo_env *env) + const char *field) { - static const char *const shortcuts[] = { - "filename", - "license", - "author", - "description", - "version", - "alias", - "srcversion", - "depends", - "uts_release", - "vermagic", - "parm", - "firmware", - }; size_t len; int j; char *ptr, *the_module; - const char *field = env->field; - int tags = env->tags; - - if (tags & 1) { /* filename */ - display(path, shortcuts[0], 1 != tags); - } + char *allocated; + int tags = option_mask32; + allocated = NULL; len = MAXINT(ssize_t); the_module = xmalloc_open_zipped_read_close(path, &len); if (!the_module) { if (path[0] == '/') return; /* Newer depmod puts relative paths in modules.dep */ - path = xasprintf("%s/%s/%s", CONFIG_DEFAULT_MODULES_DIR, version, path); + path = allocated = xasprintf("%s/%s/%s", CONFIG_DEFAULT_MODULES_DIR, version, path); the_module = xmalloc_open_zipped_read_close(path, &len); - free((char*)path); - if (!the_module) - return; + if (!the_module) { + bb_error_msg("module '%s' not found", path); + goto ret; + } } - if (field) - tags |= OPT_F; - for (j = 1; (1<<j) & (OPT_TAGS + OPT_F); j++) { + for (j = 1; (1<<j) & (OPT_TAGS|OPT_F); j++) { const char *pattern; if (!((1<<j) & tags)) continue; + pattern = field; if ((1<<j) & OPT_TAGS) - pattern = shortcuts[j]; + pattern = shortcuts[j-2]; + + if (strcmp(pattern, shortcuts[0]) == 0) { + /* "-n" or "-F filename" */ + display(path, shortcuts[0]); + continue; + } + ptr = the_module; while (1) { char *after_pattern; @@ -106,7 +111,7 @@ static void modinfo(const char *path, const char *version, /* field prefixes are 0x80 or 0x00 */ if ((ptr[-1] & 0x7F) == 0x00) { ptr = after_pattern + 1; - display(ptr, pattern, (1<<j) != tags); + display(ptr, pattern); ptr += strlen(ptr); } } @@ -114,15 +119,18 @@ static void modinfo(const char *path, const char *version, } } free(the_module); + ret: + free(allocated); } //usage:#define modinfo_trivial_usage -//usage: "[-adlp0] [-F keyword] MODULE" +//usage: "[-adlpn0] [-F keyword] MODULE" //usage:#define modinfo_full_usage "\n\n" //usage: " -a Shortcut for '-F author'" //usage: "\n -d Shortcut for '-F description'" //usage: "\n -l Shortcut for '-F license'" //usage: "\n -p Shortcut for '-F parm'" +////usage: "\n -n Shortcut for '-F filename'" //usage: "\n -F keyword Keyword to look for" //usage: "\n -0 Separate output with NULs" //usage:#define modinfo_example_usage @@ -131,7 +139,7 @@ static void modinfo(const char *path, const char *version, int modinfo_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int modinfo_main(int argc UNUSED_PARAM, char **argv) { - struct modinfo_env env; + const char *field; char name[MODULE_NAME_LEN]; struct utsname uts; parser_t *parser; @@ -139,10 +147,12 @@ int modinfo_main(int argc UNUSED_PARAM, char **argv) unsigned opts; unsigned i; - env.field = NULL; + field = NULL; opt_complementary = "-1"; /* minimum one param */ - opts = getopt32(argv, "nladvAsDumpF:0", &env.field); - env.tags = opts & OPT_TAGS ? opts & OPT_TAGS : OPT_TAGS; + opts = getopt32(argv, "0F:nadlp", &field); + /* If no field selected, show all */ + if (!(opts & (OPT_TAGS|OPT_F))) + option_mask32 |= OPT_TAGS; argv += optind; uname(&uts); @@ -159,7 +169,7 @@ int modinfo_main(int argc UNUSED_PARAM, char **argv) filename2modname(bb_basename(tokens[0]), name); for (i = 0; argv[i]; i++) { if (fnmatch(argv[i], name, 0) == 0) { - modinfo(tokens[0], uts.release, &env); + modinfo(tokens[0], uts.release, field); argv[i] = (char *) ""; } } @@ -169,7 +179,7 @@ int modinfo_main(int argc UNUSED_PARAM, char **argv) for (i = 0; argv[i]; i++) { if (argv[i][0]) { - modinfo(argv[i], uts.release, &env); + modinfo(argv[i], uts.release, field); } } |