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depmod: fix -b option (by timo.teras AT iki.fi)

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function                                             old     new   delta
xfreopen_write                                         -      35     +35
parse_module                                         346     353      +7
depmod_main                                          553     546      -7
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 42/-7)              Total: 35 bytes
This commit is contained in:
Denis Vlasenko 2009-01-12 22:12:22 +00:00
parent f478fde33c
commit 35261159e6
1 changed files with 37 additions and 20 deletions
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57
modutils/depmod.c
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@ -33,7 +33,7 @@ typedef struct module_info {
enum { enum {
ARG_a = (1<<0), /* All modules, ignore mods in argv */ ARG_a = (1<<0), /* All modules, ignore mods in argv */
ARG_A = (1<<1), /* Only emit .ko that are newer than modules.dep file */ ARG_A = (1<<1), /* Only emit .ko that are newer than modules.dep file */
ARG_b = (1<<2), /* not /lib/modules/$(uname -r)/ but this base-dir */ ARG_b = (1<<2), /* base directory when modules are in staging area */
ARG_e = (1<<3), /* with -F, print unresolved symbols */ ARG_e = (1<<3), /* with -F, print unresolved symbols */
ARG_F = (1<<4), /* System.map that contains the symbols */ ARG_F = (1<<4), /* System.map that contains the symbols */
ARG_n = (1<<5) /* dry-run, print to stdout only */ ARG_n = (1<<5) /* dry-run, print to stdout only */
@ -57,7 +57,7 @@ static int FAST_FUNC parse_module(const char *fname, struct stat *sb,
*first = info; *first = info;
info->dnext = info->dprev = info; info->dnext = info->dprev = info;
info->name = xstrdup(fname); info->name = xasprintf("/%s", fname);
info->modname = filename2modname(fname, NULL); info->modname = filename2modname(fname, NULL);
for (ptr = image; ptr < image + len - 10; ptr++) { for (ptr = image; ptr < image + len - 10; ptr++) {
if (strncmp(ptr, "depends=", 8) == 0) { if (strncmp(ptr, "depends=", 8) == 0) {
@ -123,44 +123,61 @@ static void order_dep_list(module_info *modules, module_info *start,
} }
} }
static void xfreopen_write(const char *file, FILE *f)
{
if (freopen(file, "w", f) == NULL)
bb_perror_msg_and_die("can't open '%s'", file);
}
int depmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int depmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int depmod_main(int argc UNUSED_PARAM, char **argv) int depmod_main(int argc UNUSED_PARAM, char **argv)
{ {
module_info *modules = NULL, *m, *dep; module_info *modules = NULL, *m, *dep;
char *moddir_base = (char *)CONFIG_DEFAULT_MODULES_DIR; const char *moddir_base = "/";
char *moddir, *version;
struct utsname uts;
int tmp; int tmp;
getopt32(argv, "aAb:eF:n", &moddir_base, NULL); getopt32(argv, "aAb:eF:n", &moddir_base, NULL);
argv += optind; argv += optind;
/* goto modules location */ /* goto modules location */
xchdir(moddir_base);
/* If a version is provided, then that kernel version's module directory /* If a version is provided, then that kernel version's module directory
* is used, rather than the current kernel version (as returned by * is used, rather than the current kernel version (as returned by
* "uname -r"). */ * "uname -r"). */
xchdir(moddir_base); if (*argv && sscanf(*argv, "%d.%d.%d", &tmp, &tmp, &tmp) == 3) {
if (*argv && (sscanf(*argv, "%d.%d.%d", &tmp, &tmp, &tmp) == 3)) { version = *argv++;
xchdir(*argv++);
} else { } else {
struct utsname uts;
uname(&uts); uname(&uts);
xchdir(uts.release); version = uts.release;
} }
/* If no modules are given on the command-line, -a is on per default. */ moddir = concat_path_file(&CONFIG_DEFAULT_MODULES_DIR[1], version);
option_mask32 |= *argv == NULL;
/* Scan modules */ /* Scan modules */
moddir_base = xrealloc_getcwd_or_warn(NULL); if (*argv) {
do { char *modfile;
recursive_action((option_mask32 & ARG_a) ? moddir_base : *argv, struct stat sb;
ACTION_RECURSE, parse_module, NULL, &modules, 0); do {
} while (!(option_mask32 & ARG_a) && *(++argv)); modfile = concat_path_file(moddir, *argv);
xstat(modfile, &sb);
parse_module(modfile, &sb, &modules, 0);
free(modfile);
} while (*(++argv));
} else {
recursive_action(moddir, ACTION_RECURSE,
parse_module, NULL, &modules, 0);
}
/* Prepare for writing out the dep files */
xchdir(moddir);
if (ENABLE_FEATURE_CLEAN_UP) if (ENABLE_FEATURE_CLEAN_UP)
free(moddir_base); free(moddir);
/* Generate dependency and alias files */ /* Generate dependency and alias files */
if (!(option_mask32 & ARG_n)) if (!(option_mask32 & ARG_n))
freopen(CONFIG_DEFAULT_DEPMOD_FILE, "w", stdout); xfreopen_write(CONFIG_DEFAULT_DEPMOD_FILE, stdout);
for (m = modules; m != NULL; m = m->next) { for (m = modules; m != NULL; m = m->next) {
printf("%s:", m->name); printf("%s:", m->name);
@ -174,12 +191,12 @@ int depmod_main(int argc UNUSED_PARAM, char **argv)
dep->dprev->dnext = dep->dnext; dep->dprev->dnext = dep->dnext;
dep->dnext = dep->dprev = dep; dep->dnext = dep->dprev = dep;
} }
puts(""); bb_putchar('\n');
} }
#if ENABLE_FEATURE_MODUTILS_ALIAS #if ENABLE_FEATURE_MODUTILS_ALIAS
if (!(option_mask32 & ARG_n)) if (!(option_mask32 & ARG_n))
freopen("modules.alias", "w", stdout); xfreopen_write("modules.alias", stdout);
for (m = modules; m != NULL; m = m->next) { for (m = modules; m != NULL; m = m->next) {
while (m->aliases) { while (m->aliases) {
printf("alias %s %s\n", printf("alias %s %s\n",
@ -190,7 +207,7 @@ int depmod_main(int argc UNUSED_PARAM, char **argv)
#endif #endif
#if ENABLE_FEATURE_MODUTILS_SYMBOLS #if ENABLE_FEATURE_MODUTILS_SYMBOLS
if (!(option_mask32 & ARG_n)) if (!(option_mask32 & ARG_n))
freopen("modules.symbols", "w", stdout); xfreopen_write("modules.symbols", stdout);
for (m = modules; m != NULL; m = m->next) { for (m = modules; m != NULL; m = m->next) {
while (m->symbols) { while (m->symbols) {
printf("alias symbol:%s %s\n", printf("alias symbol:%s %s\n",