[PATCH] support for modprobe.d
Natanael Copa
natanael.copa at gmail.com
Wed Jul 9 15:01:06 UTC 2008
hi,
attatched is a patch from Timo Teräs that adds support for modprobe.d
seems like it increase size on my hardened gcc-3.4.6 uclibc setup but
reduce size on glibc + gcc-4.2.3
includes a compilation fix for mtab
-nc
-------------- next part --------------
Index: modutils/modprobe.c
===================================================================
--- modutils/modprobe.c (revision 22700)
+++ modutils/modprobe.c (working copy)
@@ -48,6 +48,10 @@
struct mod_list_t * m_next;
};
+struct include_conf_t {
+ struct dep_t *first;
+ struct dep_t *current;
+};
static struct dep_t *depend;
@@ -242,21 +246,60 @@
* This function reads aliases and default module options from a configuration file
* (/etc/modprobe.conf syntax). It supports includes (only files, no directories).
*/
-static void include_conf(struct dep_t **first, struct dep_t **current, char *buffer, int buflen, int fd)
+
+static int FAST_FUNC include_conf_file_act(const char *filename,
+ struct stat *statbuf UNUSED_PARAM,
+ void *userdata,
+ int depth UNUSED_PARAM);
+
+static int FAST_FUNC include_conf_dir_act(const char *filename UNUSED_PARAM,
+ struct stat *statbuf UNUSED_PARAM,
+ void *userdata UNUSED_PARAM,
+ int depth)
{
+ if (depth > 1)
+ return SKIP;
+
+ return TRUE;
+}
+
+static int inline include_conf_recursive(struct include_conf_t *conf, const char *filename)
+{
+ return recursive_action(filename, ACTION_RECURSE,
+ include_conf_file_act,
+ include_conf_dir_act,
+ conf, 1);
+}
+
+static int FAST_FUNC include_conf_file_act(const char *filename,
+ struct stat *statbuf UNUSED_PARAM,
+ void *userdata,
+ int depth UNUSED_PARAM)
+{
+ struct include_conf_t *conf = (struct include_conf_t *) userdata;
+ struct dep_t **first = &conf->first;
+ struct dep_t **current = &conf->current;
int continuation_line = 0;
+ int fd;
+ if (bb_basename(filename)[0] == '.')
+ return TRUE;
+
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ return FALSE;
+
// alias parsing is not 100% correct (no correct handling of continuation lines within an alias)!
- while (reads(fd, buffer, buflen)) {
+ while (reads(fd, line_buffer, sizeof(line_buffer))) {
int l;
- *strchrnul(buffer, '#') = '\0';
+ *strchrnul(line_buffer, '#') = '\0';
- l = strlen(buffer);
+ l = strlen(line_buffer);
- while (l && isspace(buffer[l-1])) {
- buffer[l-1] = '\0';
+ while (l && isspace(line_buffer[l-1])) {
+ line_buffer[l-1] = '\0';
l--;
}
@@ -268,10 +311,10 @@
if (continuation_line)
continue;
- if (is_conf_command(buffer, "alias")) {
+ if (is_conf_command(line_buffer, "alias")) {
char *alias, *mod;
- if (parse_tag_value(buffer + 6, &alias, &mod)) {
+ if (parse_tag_value(line_buffer + 6, &alias, &mod)) {
/* handle alias as a module dependent on the aliased module */
if (!*current) {
(*first) = (*current) = xzalloc(sizeof(struct dep_t));
@@ -292,11 +335,11 @@
}
/*(*current)->m_next = NULL; - done by xzalloc */
}
- } else if (is_conf_command(buffer, "options")) {
+ } else if (is_conf_command(line_buffer, "options")) {
char *mod, *opt;
/* split the line in the module/alias name, and options */
- if (parse_tag_value(buffer + 8, &mod, &opt)) {
+ if (parse_tag_value(line_buffer + 8, &mod, &opt)) {
struct dep_t *dt;
/* find the corresponding module */
@@ -315,22 +358,17 @@
}
}
}
- } else if (is_conf_command(buffer, "include")) {
- int fdi;
- char *filename;
+ } else if (is_conf_command(line_buffer, "include")) {
+ char *includefile;
- filename = skip_whitespace(buffer + 8);
- fdi = open(filename, O_RDONLY);
- if (fdi >= 0) {
- include_conf(first, current, buffer, buflen, fdi);
- close(fdi);
- }
+ includefile = skip_whitespace(line_buffer + 8);
+ include_conf_recursive(conf, includefile);
} else if (ENABLE_FEATURE_MODPROBE_BLACKLIST &&
- (is_conf_command(buffer, "blacklist"))) {
+ (is_conf_command(line_buffer, "blacklist"))) {
char *mod;
struct dep_t *dt;
- mod = skip_whitespace(buffer + 10);
+ mod = skip_whitespace(line_buffer + 10);
for (dt = *first; dt; dt = dt->m_next) {
if (strcmp(dt->m_name, mod) == 0)
break;
@@ -339,8 +377,25 @@
dt->m_isblacklisted = 1;
}
} /* while (reads(...)) */
+
+ close(fd);
+ return TRUE;
}
+static int include_conf_file(struct include_conf_t *conf,
+ const char *filename)
+{
+ return include_conf_file_act(filename, NULL, conf, 0);
+}
+
+static int include_conf_file2(struct include_conf_t *conf,
+ const char *filename, const char *oldname)
+{
+ if (include_conf_file(conf, filename) == TRUE)
+ return TRUE;
+ return include_conf_file(conf, oldname);
+}
+
/*
* This function builds a list of dependency rules from /lib/modules/`uname -r`/modules.dep.
* It then fills every modules and aliases with their default options, found by parsing
@@ -350,8 +405,7 @@
{
int fd;
struct utsname un;
- struct dep_t *first = NULL;
- struct dep_t *current = NULL;
+ struct include_conf_t conf = { NULL, NULL };
char *filename;
int continuation_line = 0;
int k_version;
@@ -421,14 +475,14 @@
mod = xstrndup(mods, dot - mods);
/* enqueue new module */
- if (!current) {
- first = current = xzalloc(sizeof(struct dep_t));
+ if (!conf.current) {
+ conf.first = conf.current = xzalloc(sizeof(struct dep_t));
} else {
- current->m_next = xzalloc(sizeof(struct dep_t));
- current = current->m_next;
+ conf.current->m_next = xzalloc(sizeof(struct dep_t));
+ conf.current = conf.current->m_next;
}
- current->m_name = mod;
- current->m_path = xstrdup(modpath);
+ conf.current->m_name = mod;
+ conf.current->m_path = xstrdup(modpath);
/*current->m_options = NULL; - xzalloc did it*/
/*current->m_isalias = 0;*/
/*current->m_depcnt = 0;*/
@@ -482,8 +536,8 @@
dep = xstrndup(deps, next - deps - ext + 1);
/* Add the new dependable module name */
- current->m_deparr = xrealloc_vector(current->m_deparr, 2, current->m_depcnt);
- current->m_deparr[current->m_depcnt++] = dep;
+ conf.current->m_deparr = xrealloc_vector(conf.current->m_deparr, 2, conf.current->m_depcnt);
+ conf.current->m_deparr[conf.current->m_depcnt++] = dep;
p = next + 2;
} while (next < end);
@@ -500,52 +554,41 @@
* >=2.6: we only care about modprobe.conf
* <=2.4: we care about modules.conf and conf.modules
*/
- if (ENABLE_FEATURE_2_6_MODULES
- && (fd = open("/etc/modprobe.conf", O_RDONLY)) < 0)
- if (ENABLE_FEATURE_2_4_MODULES
- && (fd = open("/etc/modules.conf", O_RDONLY)) < 0)
- if (ENABLE_FEATURE_2_4_MODULES)
- fd = open("/etc/conf.modules", O_RDONLY);
+ {
+ int r = FALSE;
- if (fd >= 0) {
- include_conf(&first, ¤t, line_buffer, sizeof(line_buffer), fd);
- close(fd);
+ if (ENABLE_FEATURE_2_6_MODULES) {
+ if (include_conf_file(&conf, "/etc/modprobe.conf"))
+ r = TRUE;
+ if (include_conf_recursive(&conf, "/etc/modprobe.d"))
+ r = TRUE;
+ }
+ if (ENABLE_FEATURE_2_4_MODULES && !r)
+ include_conf_file2(&conf,
+ "/etc/modules.conf",
+ "/etc/conf.modules");
}
/* Only 2.6 has a modules.alias file */
if (ENABLE_FEATURE_2_6_MODULES) {
/* Parse kernel-declared module aliases */
filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.alias", un.release);
- fd = open(filename, O_RDONLY);
- if (fd < 0) {
- /* Ok, that didn't work. Fall back to looking in /lib/modules */
- fd = open(CONFIG_DEFAULT_MODULES_DIR"/modules.alias", O_RDONLY);
- }
+ include_conf_file2(&conf,
+ filename,
+ CONFIG_DEFAULT_MODULES_DIR"/modules.alias");
if (ENABLE_FEATURE_CLEAN_UP)
free(filename);
- if (fd >= 0) {
- include_conf(&first, ¤t, line_buffer, sizeof(line_buffer), fd);
- close(fd);
- }
-
/* Parse kernel-declared symbol aliases */
filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.symbols", un.release);
- fd = open(filename, O_RDONLY);
- if (fd < 0) {
- /* Ok, that didn't work. Fall back to looking in /lib/modules */
- fd = open(CONFIG_DEFAULT_MODULES_DIR"/modules.symbols", O_RDONLY);
- }
+ include_conf_file2(&conf,
+ filename,
+ CONFIG_DEFAULT_MODULES_DIR"/modules.symbols");
if (ENABLE_FEATURE_CLEAN_UP)
free(filename);
-
- if (fd >= 0) {
- include_conf(&first, ¤t, line_buffer, sizeof(line_buffer), fd);
- close(fd);
- }
}
- return first;
+ return conf.first;
}
/* return 1 = loaded, 0 = not loaded, -1 = can't tell */
Index: modutils/insmod.c
===================================================================
--- modutils/insmod.c (revision 22700)
+++ modutils/insmod.c (working copy)
@@ -3082,7 +3082,7 @@
if (i == f->header.e_shnum) {
struct obj_section *sec;
- f->sections = xrealloc(f->sections, 2, i);
+ f->sections = xrealloc_vector(f->sections, 2, i);
f->sections[i] = sec = arch_new_section();
f->header.e_shnum = i + 1;
Index: coreutils/install.c
===================================================================
--- coreutils/install.c (revision 22700)
+++ coreutils/install.c (working copy)
@@ -20,6 +20,7 @@
"group\0" No_argument "g"
"mode\0" No_argument "m"
"owner\0" No_argument "o"
+ "\0" No_argument "D"
/* autofs build insists of using -b --suffix=.orig */
/* TODO? (short option for --suffix is -S) */
#if ENABLE_SELINUX
@@ -63,6 +64,36 @@
#endif
+static int create_dirs_with_owner(char *path, int mode, int setowner, int uid, int gid, int skiplast)
+{
+ int ret = 0;
+ char *slash = path;
+ while (1) {
+ slash = strchr(slash + 1, '/');
+ if (slash) {
+ *slash = '\0';
+ } else if (skiplast) {
+ break;
+ }
+ if (mkdir(path, mode | 0111) == -1) {
+ if (errno != EEXIST) {
+ bb_perror_msg("cannot create %s", path);
+ ret = EXIT_FAILURE;
+ break;
+ }
+ } /* dir was created, chown? */
+ else if (setowner && lchown(path, uid, gid) == -1) {
+ bb_perror_msg("cannot change ownership of %s", path);
+ ret = EXIT_FAILURE;
+ break;
+ }
+ if (!slash)
+ break;
+ *slash = '/';
+ }
+ return ret;
+}
+
int install_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int install_main(int argc, char **argv)
{
@@ -92,9 +123,10 @@
OPT_GROUP = 1 << 6,
OPT_MODE = 1 << 7,
OPT_OWNER = 1 << 8,
+ OPT_MKDIRDEST = 1 << 9,
#if ENABLE_SELINUX
- OPT_SET_SECURITY_CONTEXT = 1 << 9,
- OPT_PRESERVE_SECURITY_CONTEXT = 1 << 10,
+ OPT_SET_SECURITY_CONTEXT = 1 << 10,
+ OPT_PRESERVE_SECURITY_CONTEXT = 1 << 11,
#endif
};
@@ -105,7 +137,7 @@
/* -c exists for backwards compatibility, it's needed */
/* -v is ignored ("print name of each created directory") */
/* -b is ignored ("make a backup of each existing destination file") */
- flags = getopt32(argv, "cvb" "dpsg:m:o:" USE_SELINUX("Z:"),
+ flags = getopt32(argv, "cvb" "dpsg:m:o:D" USE_SELINUX("Z:"),
&gid_str, &mode_str, &uid_str USE_SELINUX(, &scontext));
argc -= optind;
argv += optind;
@@ -142,29 +174,10 @@
*/
if (flags & OPT_DIRECTORY) {
while ((arg = *argv++) != NULL) {
- char *slash = arg;
- while (1) {
- slash = strchr(slash + 1, '/');
- if (slash)
- *slash = '\0';
- if (mkdir(arg, mode | 0111) == -1) {
- if (errno != EEXIST) {
- bb_perror_msg("cannot create %s", arg);
- ret = EXIT_FAILURE;
- break;
- }
- } /* dir was created, chown? */
- else if ((flags & (OPT_OWNER|OPT_GROUP))
- && lchown(arg, uid, gid) == -1
- ) {
- bb_perror_msg("cannot change ownership of %s", arg);
- ret = EXIT_FAILURE;
- break;
- }
- if (!slash)
- break;
- *slash = '/';
- }
+ int status = create_dirs_with_owner(arg, mode,
+ flags & (OPT_OWNER|OPT_GROUP), uid, gid, 0);
+ if (status)
+ ret = status;
}
return ret;
}
@@ -181,6 +194,9 @@
char *dest = last;
if (isdir)
dest = concat_path_file(last, basename(arg));
+ if (flags & OPT_MKDIRDEST)
+ create_dirs_with_owner(dest, mode,
+ flags & (OPT_OWNER|OPT_GROUP), uid, gid, 1);
if (copy_file(arg, dest, copy_flags)) {
/* copy is not made */
ret = EXIT_FAILURE;
Index: libbb/mtab.c
===================================================================
--- libbb/mtab.c (revision 22700)
+++ libbb/mtab.c (working copy)
@@ -27,7 +27,7 @@
}
while ((m = getmntent(mountTable)) != 0) {
- entries = xrealloc(entries, 3, count);
+ entries = xrealloc_vector(entries, 3, count);
entries[count].mnt_fsname = xstrdup(m->mnt_fsname);
entries[count].mnt_dir = xstrdup(m->mnt_dir);
entries[count].mnt_type = xstrdup(m->mnt_type);
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