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depmod: fix handling of .gz modules

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-05-18 13:08:04 +02:00
parent c396fe6306
commit 16bda3bd1f
3 changed files with 47 additions and 14 deletions
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39
modutils/depmod.c
View File

@ -40,26 +40,28 @@ enum {
ARG_r = (1<<6) /* Compat dummy. Linux Makefile uses it */
};
static int FAST_FUNC parse_module(const char *fname, struct stat *sb,
void *data, int UNUSED_PARAM depth)
static int FAST_FUNC parse_module(const char *fname, struct stat *sb UNUSED_PARAM,
void *data, int depth UNUSED_PARAM)
{
char modname[MODULE_NAME_LEN];
module_info **first = (module_info **) data;
char *image, *ptr;
module_info *info;
size_t len = sb->st_size;
/* Arbitrary. Was sb->st_size, but that breaks .gz etc */
size_t len = (64*1024*1024 - 4096);
if (strrstr(fname, ".ko") == NULL)
return TRUE;
image = xmalloc_open_zipped_read_close(fname, &len);
info = xzalloc(sizeof(module_info));
info = xzalloc(sizeof(*info));
info->next = *first;
*first = info;
info->dnext = info->dprev = info;
info->name = xasprintf("/%s", fname);
info->modname = filename2modname(fname, NULL);
info->modname = xstrdup(filename2modname(fname, modname));
for (ptr = image; ptr < image + len - 10; ptr++) {
if (strncmp(ptr, "depends=", 8) == 0) {
char *u;
@ -69,12 +71,14 @@ static int FAST_FUNC parse_module(const char *fname, struct stat *sb,
if (*u == '-')
*u = '_';
ptr += string_to_llist(ptr, &info->dependencies, ",");
} else if (ENABLE_FEATURE_MODUTILS_ALIAS &&
strncmp(ptr, "alias=", 6) == 0) {
} else if (ENABLE_FEATURE_MODUTILS_ALIAS
&& strncmp(ptr, "alias=", 6) == 0
) {
llist_add_to(&info->aliases, xstrdup(ptr + 6));
ptr += strlen(ptr);
} else if (ENABLE_FEATURE_MODUTILS_SYMBOLS &&
strncmp(ptr, "__ksymtab_", 10) == 0) {
} else if (ENABLE_FEATURE_MODUTILS_SYMBOLS
&& strncmp(ptr, "__ksymtab_", 10) == 0
) {
ptr += 10;
if (strncmp(ptr, "gpl", 3) == 0 ||
strcmp(ptr, "strings") == 0)
@ -199,10 +203,17 @@ int depmod_main(int argc UNUSED_PARAM, char **argv)
if (!(option_mask32 & ARG_n))
xfreopen_write("modules.alias", stdout);
for (m = modules; m != NULL; m = m->next) {
const char *fname = bb_basename(m->name);
int fnlen = strchrnul(fname, '.') - fname;
while (m->aliases) {
printf("alias %s %s\n",
/* Last word can well be m->modname instead,
* but depmod from module-init-tools 3.4
* uses module basename, i.e., no s/-/_/g.
* (pathname and .ko.* are still stripped)
* Mimicking that... */
printf("alias %s %.*s\n",
(char*)llist_pop(&m->aliases),
m->modname);
fnlen, fname);
}
}
#endif
@ -210,10 +221,12 @@ int depmod_main(int argc UNUSED_PARAM, char **argv)
if (!(option_mask32 & ARG_n))
xfreopen_write("modules.symbols", stdout);
for (m = modules; m != NULL; m = m->next) {
const char *fname = bb_basename(m->name);
int fnlen = strchrnul(fname, '.') - fname;
while (m->symbols) {
printf("alias symbol:%s %s\n",
printf("alias symbol:%s %.*s\n",
(char*)llist_pop(&m->symbols),
m->modname);
fnlen, fname);
}
}
#endif

20
modutils/depmod_process.sh Executable file
View File

@ -0,0 +1,20 @@
#!/bin/sh
# Depmod output may be hard to diff.
# This script sorts dependencies within "xx.ko: yy.ko zz.ko" lines,
# and sorts all lines too.
# Usage:
#
# [./busybox] depmod -n | ./depmod_process.sh | sort >OUTFILE
#
# and then you can diff OUTFILEs. Useful for comparing bbox depmod
# with module-init-tools depmod and such.
while read -r word rest; do
if ! test "${word/*:/}"; then
echo -n "$word "
echo "$rest" | xargs -n1 | sort | xargs
else
echo "$word $rest";
fi
done

2
modutils/modutils.c
View File

@ -57,7 +57,7 @@ char * FAST_FUNC filename2modname(const char *filename, char *modname)
from = bb_get_last_path_component_nostrip(filename);
for (i = 0; i < (MODULE_NAME_LEN-1) && from[i] != '\0' && from[i] != '.'; i++)
modname[i] = (from[i] == '-') ? '_' : from[i];
modname[i] = 0;
modname[i] = '\0';
return modname;
}