[git commit master 1/1] modprobe: add support for --show-depends
Denys Vlasenko
vda.linux at googlemail.com
Sun Dec 26 00:56:19 UTC 2010
commit: http://git.busybox.net/busybox/commit/?id=e4e911e7124fca9116ca14c31f125b687d0ae57e
branch: http://git.busybox.net/busybox/commit/?id=refs/heads/master
function old new delta
modprobe_longopts - 16 +16
packed_usage 28018 28028 +10
modprobe_main 648 653 +5
do_modprobe 580 536 -44
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/1 up/down: 31/-44) Total: -13 bytes
Signed-off-by: Serj Kalichev <serj.kalichev at gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
archival/tar.c | 1 -
modutils/modprobe.c | 95 ++++++++++++++++++++++++++++++++-------------------
2 files changed, 60 insertions(+), 36 deletions(-)
diff --git a/archival/tar.c b/archival/tar.c
index 82caec7..ebaa965 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -882,7 +882,6 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
/* Prepend '-' to the first argument if required */
opt_complementary = "--:" // first arg is options
"tt:vv:" // count -t,-v
- "?:" // bail out with usage instead of error return
"X::T::" // cumulative lists
#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
"\xff::" // cumulative lists for --exclude
diff --git a/modutils/modprobe.c b/modutils/modprobe.c
index a5cf4ba..8e83f41 100644
--- a/modutils/modprobe.c
+++ b/modutils/modprobe.c
@@ -72,19 +72,21 @@
//usage: " from the command line\n"
//usage:
//usage:#define modprobe_trivial_usage
-//usage: "[-alrqvs"
-//usage: IF_FEATURE_MODPROBE_BLACKLIST("b")
-//usage: "] MODULE [symbol=value]..."
+//usage: "[-alrqvs" IF_FEATURE_MODPROBE_BLACKLIST("b") "]"
+//usage: IF_LONG_OPTS(" [--show-depends]") " MODULE [symbol=value]..."
//usage:#define modprobe_full_usage "\n\n"
//usage: "Options:"
-//usage: "\n -a Load multiple MODULEs"
-//usage: "\n -l List (MODULE is a pattern)"
-//usage: "\n -r Remove MODULE (stacks) or do autoclean"
-//usage: "\n -q Quiet"
-//usage: "\n -v Verbose"
-//usage: "\n -s Log to syslog"
+//usage: "\n -a Load multiple MODULEs"
+//usage: "\n -l List (MODULE is a pattern)"
+//usage: "\n -r Remove MODULE (stacks) or do autoclean"
+//usage: "\n -q Quiet"
+//usage: "\n -v Verbose"
+//usage: "\n -s Log to syslog"
//usage: IF_FEATURE_MODPROBE_BLACKLIST(
-//usage: "\n -b Apply blacklist to module names too"
+//usage: "\n -b Apply blacklist to module names too"
+//usage: )
+//usage: IF_LONG_OPTS(
+//usage: "\n --show-depends Show dependencies"
//usage: )
//usage:#endif /* !ENABLE_MODPROBE_SMALL */
@@ -101,24 +103,35 @@
* Older versions would only export the direct dependency list.
*/
+
/* Note that usage text doesn't document various 2.4 options
* we pull in through INSMOD_OPTS define */
-
-#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--ar:a--lr:r--al"
#define MODPROBE_OPTS "alr" IF_FEATURE_MODPROBE_BLACKLIST("b")
-//#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
+#undef SD
+#if ENABLE_LONG_OPTS
+static const char modprobe_longopts[] ALIGN1 =
+ "show-depends\0" No_argument "\xff"
+ ;
+# define SD "\xff"
+#else
+# define SD ""
+#endif
+#define MODPROBE_COMPLEMENTARY ("q-v:v-q:l--ar"SD":a--lr"SD":r--al"SD IF_LONG_OPTS(":\xff--arl"))
//#define MODPROBE_OPTS "acd:lnrt:C:" IF_FEATURE_MODPROBE_BLACKLIST("b")
+//#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
enum {
- MODPROBE_OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
- //MODPROBE_OPT_DUMP_ONLY= (INSMOD_OPT_UNUSED << x), /* c */
- //MODPROBE_OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */
- MODPROBE_OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */
- //MODPROBE_OPT_SHOW_ONLY= (INSMOD_OPT_UNUSED << x), /* n */
- MODPROBE_OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */
- //MODPROBE_OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */
- //MODPROBE_OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */
- //MODPROBE_OPT_CONFIGFILE=(INSMOD_OPT_UNUSED << x), /* C */
- MODPROBE_OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 3) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
+ OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
+ //OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << x), /* c */
+ //OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */
+ OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */
+ //OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << x), /* n */
+ OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */
+ //OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */
+ //OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */
+ //OPT_CONFIGFILE =(INSMOD_OPT_UNUSED << x), /* C */
+ OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 3) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
+ OPTBIT_SHOW_DEPS = (3 + ENABLE_FEATURE_MODPROBE_BLACKLIST),
+ OPT_SHOW_DEPS = (INSMOD_OPT_UNUSED << OPTBIT_SHOW_DEPS) * ENABLE_LONG_OPTS,
};
#define MODULE_FLAG_LOADED 0x0001
@@ -145,9 +158,13 @@ struct globals {
int num_unresolved_deps;
/* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
smallint need_symbols;
+ struct utsname uts;
} FIX_ALIASING;
#define G (*(struct globals*)&bb_common_bufsiz1)
#define INIT_G() do { } while (0)
+struct BUG_G_too_big {
+ char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
+};
static int read_config(const char *path);
@@ -202,7 +219,7 @@ static void add_probe(const char *name)
struct module_entry *m;
m = get_or_add_modentry(name);
- if (!(option_mask32 & MODPROBE_OPT_REMOVE)
+ if (!(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
&& (m->flags & MODULE_FLAG_LOADED)
) {
DBG("skipping %s, it is already loaded", name);
@@ -366,7 +383,7 @@ static int do_modprobe(struct module_entry *m)
}
DBG("do_modprob'ing %s", m->modname);
- if (!(option_mask32 & MODPROBE_OPT_REMOVE))
+ if (!(option_mask32 & OPT_REMOVE))
m->deps = llist_rev(m->deps);
for (l = m->deps; l != NULL; l = l->link)
@@ -379,7 +396,13 @@ static int do_modprobe(struct module_entry *m)
fn = llist_pop(&m->deps); /* we leak it */
m2 = get_or_add_modentry(fn);
- if (option_mask32 & MODPROBE_OPT_REMOVE) {
+ if (option_mask32 & OPT_SHOW_DEPS) {
+ printf("insmod %s/%s/%s\n", CONFIG_DEFAULT_MODULES_DIR,
+ G.uts.release, fn);
+ continue;
+ }
+
+ if (option_mask32 & OPT_REMOVE) {
/* modprobe -r */
if (m2->flags & MODULE_FLAG_LOADED) {
rc = bb_delete_module(m2->modname, O_EXCL);
@@ -456,7 +479,7 @@ static void load_modules_dep(void)
/* Optimization... */
if ((m->flags & MODULE_FLAG_LOADED)
- && !(option_mask32 & MODPROBE_OPT_REMOVE)
+ && !(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
) {
DBG("skip deps of %s, it's already loaded", tokens[0]);
continue;
@@ -477,21 +500,23 @@ static void load_modules_dep(void)
int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int modprobe_main(int argc UNUSED_PARAM, char **argv)
{
- struct utsname uts;
int rc;
unsigned opt;
struct module_entry *me;
+ INIT_G();
+
+ IF_LONG_OPTS(applet_long_options = modprobe_longopts;)
opt_complementary = MODPROBE_COMPLEMENTARY;
opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS);
argv += optind;
/* Goto modules location */
xchdir(CONFIG_DEFAULT_MODULES_DIR);
- uname(&uts);
- xchdir(uts.release);
+ uname(&G.uts);
+ xchdir(G.uts.release);
- if (opt & MODPROBE_OPT_LIST_ONLY) {
+ if (opt & OPT_LIST_ONLY) {
char name[MODULE_NAME_LEN];
char *colon, *tokens[2];
parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
@@ -521,7 +546,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
logmode = LOGMODE_SYSLOG;
if (!argv[0]) {
- if (opt & MODPROBE_OPT_REMOVE) {
+ if (opt & OPT_REMOVE) {
/* "modprobe -r" (w/o params).
* "If name is NULL, all unused modules marked
* autoclean will be removed".
@@ -541,7 +566,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
config_close(parser);
}
- if (opt & (MODPROBE_OPT_INSERT_ALL | MODPROBE_OPT_REMOVE)) {
+ if (opt & (OPT_INSERT_ALL | OPT_REMOVE)) {
/* Each argument is a module name */
do {
DBG("adding module %s", *argv);
@@ -575,7 +600,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
/* This is not an alias. Literal names are blacklisted
* only if '-b' is given.
*/
- if (!(opt & MODPROBE_OPT_BLACKLIST)
+ if (!(opt & OPT_BLACKLIST)
|| !(me->flags & MODULE_FLAG_BLACKLISTED)
) {
rc |= do_modprobe(me);
@@ -592,7 +617,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
m2 = get_or_add_modentry(realname);
if (!(m2->flags & MODULE_FLAG_BLACKLISTED)
&& (!(m2->flags & MODULE_FLAG_LOADED)
- || (opt & MODPROBE_OPT_REMOVE))
+ || (opt & (OPT_REMOVE | OPT_SHOW_DEPS)))
) {
//TODO: we can pass "me" as 2nd param to do_modprobe,
//and make do_modprobe emit more meaningful error messages
--
1.7.2.2
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