From: Denis Vlasenko Date: Tue, 29 Jul 2008 00:19:44 +0000 (-0000) Subject: modprobe: support for /etc/modprobe.d, by Timo Teras. X-Git-Tag: 1_12_0~71 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=e1ee48e0fdfe18aadb410b62f21516bf4b8ea581;p=oweals%2Fbusybox.git modprobe: support for /etc/modprobe.d, by Timo Teras. function old new delta include_conf_file_act - 929 +929 include_conf_recursive - 30 +30 include_conf_file2 - 30 +30 include_conf_file - 14 +14 include_conf_dir_act - 14 +14 build_dep 1011 875 -136 include_conf 922 - -922 ------------------------------------------------------------------------------ (add/remove: 5/1 grow/shrink: 0/1 up/down: 1017/-1058) Total: -41 bytes --- diff --git a/modutils/modprobe.c b/modutils/modprobe.c index 1a4f5d4d4..0c59e8ab3 100644 --- a/modutils/modprobe.c +++ b/modutils/modprobe.c @@ -48,6 +48,10 @@ struct mod_list_t { /* two-way list of modules to process */ 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 @@ static int is_conf_command(char *buffer, const char *command) * 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 @@ static void include_conf(struct dep_t **first, struct dep_t **current, char *buf 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 @@ static void include_conf(struct dep_t **first, struct dep_t **current, char *buf } /*(*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 @@ static void include_conf(struct dep_t **first, struct dep_t **current, char *buf } } } - } else if (is_conf_command(buffer, "include")) { - int fdi; - char *filename; - - filename = skip_whitespace(buffer + 8); - fdi = open(filename, O_RDONLY); - if (fdi >= 0) { - include_conf(first, current, buffer, buflen, fdi); - close(fdi); - } + } else if (is_conf_command(line_buffer, "include")) { + char *includefile; + + 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; @@ -339,6 +377,23 @@ static void include_conf(struct dep_t **first, struct dep_t **current, char *buf 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); } /* @@ -350,8 +405,7 @@ static struct dep_t *build_dep(void) { 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 @@ static struct dep_t *build_dep(void) 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 @@ static struct dep_t *build_dep(void) 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 @@ static struct dep_t *build_dep(void) * >=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); - - if (fd >= 0) { - include_conf(&first, ¤t, line_buffer, sizeof(line_buffer), fd); - close(fd); + { + int r = FALSE; + + 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 */