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Diffstat (limited to 'i/pc104/initrd/conf/busybox/modutils/modprobe.c')
-rw-r--r--i/pc104/initrd/conf/busybox/modutils/modprobe.c896
1 files changed, 896 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/modutils/modprobe.c b/i/pc104/initrd/conf/busybox/modutils/modprobe.c
new file mode 100644
index 0000000..57e19b4
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/modutils/modprobe.c
@@ -0,0 +1,896 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Modprobe written from scratch for BusyBox
+ *
+ * Copyright (c) 2002 by Robert Griebl, griebl@gmx.de
+ * Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au
+ * Copyright (c) 2005 by Jim Bauer, jfbauer@nfr.com
+ *
+ * Portions Copyright (c) 2005 by Yann E. MORIN, yann.morin.1998@anciens.enib.fr
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+*/
+
+#include "busybox.h"
+#include <sys/utsname.h>
+#include <fnmatch.h>
+
+struct mod_opt_t { /* one-way list of options to pass to a module */
+ char * m_opt_val;
+ struct mod_opt_t * m_next;
+};
+
+struct dep_t { /* one-way list of dependency rules */
+ /* a dependency rule */
+ char * m_name; /* the module name*/
+ char * m_path; /* the module file path */
+ struct mod_opt_t * m_options; /* the module options */
+
+ int m_isalias : 1; /* the module is an alias */
+ int m_reserved : 15; /* stuffin' */
+
+ int m_depcnt : 16; /* the number of dependable module(s) */
+ char ** m_deparr; /* the list of dependable module(s) */
+
+ struct dep_t * m_next; /* the next dependency rule */
+};
+
+struct mod_list_t { /* two-way list of modules to process */
+ /* a module description */
+ const char * m_name;
+ char * m_path;
+ struct mod_opt_t * m_options;
+
+ struct mod_list_t * m_prev;
+ struct mod_list_t * m_next;
+};
+
+
+static struct dep_t *depend;
+
+#define main_options "acdklnqrst:vVC:"
+#define INSERT_ALL 1 /* a */
+#define DUMP_CONF_EXIT 2 /* c */
+#define D_OPT_IGNORED 4 /* d */
+#define AUTOCLEAN_FLG 8 /* k */
+#define LIST_ALL 16 /* l */
+#define SHOW_ONLY 32 /* n */
+#define QUIET 64 /* q */
+#define REMOVE_OPT 128 /* r */
+#define DO_SYSLOG 256 /* s */
+#define RESTRICT_DIR 512 /* t */
+#define VERBOSE 1024 /* v */
+#define VERSION_ONLY 2048 /* V */
+#define CONFIG_FILE 4096 /* C */
+
+#define autoclean (main_opts & AUTOCLEAN_FLG)
+#define show_only (main_opts & SHOW_ONLY)
+#define quiet (main_opts & QUIET)
+#define remove_opt (main_opts & REMOVE_OPT)
+#define do_syslog (main_opts & DO_SYSLOG)
+#define verbose (main_opts & VERBOSE)
+
+static int main_opts;
+
+static int parse_tag_value(char *buffer, char **ptag, char **pvalue)
+{
+ char *tag, *value;
+
+ buffer = skip_whitespace(buffer);
+ tag = value = buffer;
+ while (!isspace(*value))
+ if (!*value) return 0;
+ else value++;
+ *value++ = 0;
+ value = skip_whitespace(value);
+ if (!*value) return 0;
+
+ *ptag = tag;
+ *pvalue = value;
+
+ return 1;
+}
+
+/*
+ * This function appends an option to a list
+ */
+static struct mod_opt_t *append_option(struct mod_opt_t *opt_list, char *opt)
+{
+ struct mod_opt_t *ol = opt_list;
+
+ if (ol) {
+ while (ol->m_next) {
+ ol = ol->m_next;
+ }
+ ol->m_next = xmalloc(sizeof(struct mod_opt_t));
+ ol = ol->m_next;
+ } else {
+ ol = opt_list = xmalloc(sizeof(struct mod_opt_t));
+ }
+
+ ol->m_opt_val = xstrdup(opt);
+ ol->m_next = NULL;
+
+ return opt_list;
+}
+
+#if ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS
+/* static char* parse_command_string(char* src, char **dst);
+ * src: pointer to string containing argument
+ * dst: pointer to where to store the parsed argument
+ * return value: the pointer to the first char after the parsed argument,
+ * NULL if there was no argument parsed (only trailing spaces).
+ * Note that memory is allocated with xstrdup when a new argument was
+ * parsed. Don't forget to free it!
+ */
+#define ARG_EMPTY 0x00
+#define ARG_IN_DQUOTES 0x01
+#define ARG_IN_SQUOTES 0x02
+static char *parse_command_string(char *src, char **dst)
+{
+ int opt_status = ARG_EMPTY;
+ char* tmp_str;
+
+ /* Dumb you, I have nothing to do... */
+ if (src == NULL) return src;
+
+ /* Skip leading spaces */
+ while (*src == ' ') {
+ src++;
+ }
+ /* Is the end of string reached? */
+ if (*src == '\0') {
+ return NULL;
+ }
+ /* Reached the start of an argument
+ * By the way, we duplicate a little too much
+ * here but what is too much is freed later. */
+ *dst = tmp_str = xstrdup(src);
+ /* Get to the end of that argument */
+ while (*tmp_str != '\0'
+ && (*tmp_str != ' ' || (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)))
+ ) {
+ switch (*tmp_str) {
+ case '\'':
+ if (opt_status & ARG_IN_DQUOTES) {
+ /* Already in double quotes, keep current char as is */
+ } else {
+ /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
+ memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
+ /* mark me: we enter or leave single quotes */
+ opt_status ^= ARG_IN_SQUOTES;
+ /* Back one char, as we need to re-scan the new char there. */
+ tmp_str--;
+ }
+ break;
+ case '"':
+ if (opt_status & ARG_IN_SQUOTES) {
+ /* Already in single quotes, keep current char as is */
+ } else {
+ /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
+ memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
+ /* mark me: we enter or leave double quotes */
+ opt_status ^= ARG_IN_DQUOTES;
+ /* Back one char, as we need to re-scan the new char there. */
+ tmp_str--;
+ }
+ break;
+ case '\\':
+ if (opt_status & ARG_IN_SQUOTES) {
+ /* Between single quotes: keep as is. */
+ } else {
+ switch (*(tmp_str+1)) {
+ case 'a':
+ case 'b':
+ case 't':
+ case 'n':
+ case 'v':
+ case 'f':
+ case 'r':
+ case '0':
+ /* We escaped a special character. For now, keep
+ * both the back-slash and the following char. */
+ tmp_str++; src++;
+ break;
+ default:
+ /* We escaped a space or a single or double quote,
+ * or a back-slash, or a non-escapable char. Remove
+ * the '\' and keep the new current char as is. */
+ memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
+ break;
+ }
+ }
+ break;
+ /* Any other char that is special shall appear here.
+ * Example: $ starts a variable
+ case '$':
+ do_variable_expansion();
+ break;
+ * */
+ default:
+ /* any other char is kept as is. */
+ break;
+ }
+ tmp_str++; /* Go to next char */
+ src++; /* Go to next char to find the end of the argument. */
+ }
+ /* End of string, but still no ending quote */
+ if (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)) {
+ bb_error_msg_and_die("unterminated (single or double) quote in options list: %s", src);
+ }
+ *tmp_str++ = '\0';
+ *dst = xrealloc(*dst, (tmp_str - *dst));
+ return src;
+}
+#else
+#define parse_command_string(src, dst) (0)
+#endif /* ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
+
+/*
+ * 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)
+{
+ int continuation_line = 0;
+
+ // alias parsing is not 100% correct (no correct handling of continuation lines within an alias) !
+
+ while (reads(fd, buffer, buflen)) {
+ int l;
+ char *p;
+
+ p = strchr(buffer, '#');
+ if (p)
+ *p = 0;
+
+ l = strlen(buffer);
+
+ while (l && isspace(buffer[l-1])) {
+ buffer[l-1] = 0;
+ l--;
+ }
+
+ if (l == 0) {
+ continuation_line = 0;
+ continue;
+ }
+
+ if (!continuation_line) {
+ if ((strncmp(buffer, "alias", 5) == 0) && isspace(buffer[5])) {
+ char *alias, *mod;
+
+ if (parse_tag_value(buffer + 6, &alias, &mod)) {
+ /* handle alias as a module dependent on the aliased module */
+ if (!*current) {
+ (*first) = (*current) = xzalloc(sizeof(struct dep_t));
+ } else {
+ (*current)->m_next = xzalloc(sizeof(struct dep_t));
+ (*current) = (*current)->m_next;
+ }
+ (*current)->m_name = xstrdup(alias);
+ (*current)->m_isalias = 1;
+
+ if ((strcmp(mod, "off") == 0) || (strcmp(mod, "null") == 0)) {
+ (*current)->m_depcnt = 0;
+ (*current)->m_deparr = 0;
+ } else {
+ (*current)->m_depcnt = 1;
+ (*current)->m_deparr = xmalloc(1 * sizeof(char *));
+ (*current)->m_deparr[0] = xstrdup(mod);
+ }
+ (*current)->m_next = 0;
+ }
+ } else if ((strncmp(buffer, "options", 7) == 0) && isspace(buffer[7])) {
+ char *mod, *opt;
+
+ /* split the line in the module/alias name, and options */
+ if (parse_tag_value(buffer + 8, &mod, &opt)) {
+ struct dep_t *dt;
+
+ /* find the corresponding module */
+ for (dt = *first; dt; dt = dt->m_next) {
+ if (strcmp(dt->m_name, mod) == 0)
+ break;
+ }
+ if (dt) {
+ if (ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS) {
+ char* new_opt = NULL;
+ while ((opt = parse_command_string(opt, &new_opt))) {
+ dt->m_options = append_option(dt->m_options, new_opt);
+ }
+ } else {
+ dt->m_options = append_option(dt->m_options, opt);
+ }
+ }
+ }
+ } else if ((strncmp(buffer, "include", 7) == 0) && isspace(buffer[7])) {
+ int fdi; char *filename;
+
+ filename = skip_whitespace(buffer + 8);
+
+ if ((fdi = open(filename, O_RDONLY)) >= 0) {
+ include_conf(first, current, buffer, buflen, fdi);
+ close(fdi);
+ }
+ }
+ }
+ }
+}
+
+/*
+ * 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
+ * modprobe.conf (or modules.conf, or conf.modules).
+ */
+static struct dep_t *build_dep(void)
+{
+ int fd;
+ struct utsname un;
+ struct dep_t *first = 0;
+ struct dep_t *current = 0;
+ char buffer[2048];
+ char *filename;
+ int continuation_line = 0;
+ int k_version;
+
+ if (uname(&un))
+ bb_error_msg_and_die("can't determine kernel version");
+
+ k_version = 0;
+ if (un.release[0] == '2') {
+ k_version = un.release[2] - '0';
+ }
+
+ filename = xasprintf("/lib/modules/%s/modules.dep", un.release);
+ fd = open(filename, O_RDONLY);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(filename);
+ if (fd < 0) {
+ /* Ok, that didn't work. Fall back to looking in /lib/modules */
+ fd = open("/lib/modules/modules.dep", O_RDONLY);
+ if (fd < 0) {
+ return 0;
+ }
+ }
+
+ while (reads(fd, buffer, sizeof(buffer))) {
+ int l = strlen(buffer);
+ char *p = 0;
+
+ while (l > 0 && isspace(buffer[l-1])) {
+ buffer[l-1] = 0;
+ l--;
+ }
+
+ if (l == 0) {
+ continuation_line = 0;
+ continue;
+ }
+
+ /* Is this a new module dep description? */
+ if (!continuation_line) {
+ /* find the dep beginning */
+ char *col = strchr(buffer, ':');
+ char *dot = col;
+
+ if (col) {
+ /* This line is a dep description */
+ char *mods;
+ char *modpath;
+ char *mod;
+
+ /* Find the beginning of the module file name */
+ *col = 0;
+ mods = strrchr(buffer, '/');
+
+ if (!mods)
+ mods = buffer; /* no path for this module */
+ else
+ mods++; /* there was a path for this module... */
+
+ /* find the path of the module */
+ modpath = strchr(buffer, '/'); /* ... and this is the path */
+ if (!modpath)
+ modpath = buffer; /* module with no path */
+ /* find the end of the module name in the file name */
+ if (ENABLE_FEATURE_2_6_MODULES &&
+ (k_version > 4) && (*(col-3) == '.') &&
+ (*(col-2) == 'k') && (*(col-1) == 'o'))
+ dot = col - 3;
+ else
+ if ((*(col-2) == '.') && (*(col-1) == 'o'))
+ dot = col - 2;
+
+ mod = xstrndup(mods, dot - mods);
+
+ /* enqueue new module */
+ if (!current) {
+ first = current = xmalloc(sizeof(struct dep_t));
+ } else {
+ current->m_next = xmalloc(sizeof(struct dep_t));
+ current = current->m_next;
+ }
+ current->m_name = mod;
+ current->m_path = xstrdup(modpath);
+ current->m_options = NULL;
+ current->m_isalias = 0;
+ current->m_depcnt = 0;
+ current->m_deparr = 0;
+ current->m_next = 0;
+
+ p = col + 1;
+ } else
+ /* this line is not a dep description */
+ p = 0;
+ } else
+ /* It's a dep description continuation */
+ p = buffer;
+
+ while (p && *p && isblank(*p))
+ p++;
+
+ /* p points to the first dependable module; if NULL, no dependable module */
+ if (p && *p) {
+ char *end = &buffer[l-1];
+ char *deps;
+ char *dep;
+ char *next;
+ int ext = 0;
+
+ while (isblank(*end) || (*end == '\\'))
+ end--;
+
+ do {
+ /* search the end of the dependency */
+ next = strchr(p, ' ');
+ if (next) {
+ *next = 0;
+ next--;
+ } else
+ next = end;
+
+ /* find the beginning of the module file name */
+ deps = strrchr(p, '/');
+
+ if (!deps || (deps < p)) {
+ deps = p;
+
+ while (isblank(*deps))
+ deps++;
+ } else
+ deps++;
+
+ /* find the end of the module name in the file name */
+ if (ENABLE_FEATURE_2_6_MODULES
+ && (k_version > 4) && (*(next-2) == '.')
+ && (*(next-1) == 'k') && (*next == 'o'))
+ ext = 3;
+ else
+ if ((*(next-1) == '.') && (*next == 'o'))
+ ext = 2;
+
+ /* Cope with blank lines */
+ if ((next-deps-ext+1) <= 0)
+ continue;
+ dep = xstrndup(deps, next - deps - ext + 1);
+
+ /* Add the new dependable module name */
+ current->m_depcnt++;
+ current->m_deparr = xrealloc(current->m_deparr,
+ sizeof(char *) * current->m_depcnt);
+ current->m_deparr[current->m_depcnt - 1] = dep;
+
+ p = next + 2;
+ } while (next < end);
+ }
+
+ /* is there other dependable module(s) ? */
+ if (buffer[l-1] == '\\')
+ continuation_line = 1;
+ else
+ continuation_line = 0;
+ }
+ close(fd);
+
+ /*
+ * First parse system-specific options and aliases
+ * as they take precedence over the kernel ones.
+ * >=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, &current, buffer, sizeof(buffer), fd);
+ close(fd);
+ }
+
+ /* Only 2.6 has a modules.alias file */
+ if (ENABLE_FEATURE_2_6_MODULES) {
+ /* Parse kernel-declared aliases */
+ filename = xasprintf("/lib/modules/%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("/lib/modules/modules.alias", O_RDONLY);
+ }
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(filename);
+
+ if (fd >= 0) {
+ include_conf(&first, &current, buffer, sizeof(buffer), fd);
+ close(fd);
+ }
+ }
+
+ return first;
+}
+
+/* return 1 = loaded, 0 = not loaded, -1 = can't tell */
+static int already_loaded(const char *name)
+{
+ int fd, ret = 0;
+ char buffer[4096];
+
+ fd = open("/proc/modules", O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ while (reads(fd, buffer, sizeof(buffer))) {
+ char *p;
+
+ p = strchr (buffer, ' ');
+ if (p) {
+ const char *n;
+
+ // Truncate buffer at first space and check for matches, with
+ // the idiosyncrasy that _ and - are interchangeable because the
+ // 2.6 kernel does weird things.
+
+ *p = 0;
+ for (p = buffer, n = name; ; p++, n++) {
+ if (*p != *n) {
+ if ((*p == '_' || *p == '-') && (*n == '_' || *n == '-'))
+ continue;
+ break;
+ }
+ // If we made it to the end, that's a match.
+ if (!*p) {
+ ret = 1;
+ goto done;
+ }
+ }
+ }
+ }
+done:
+ close (fd);
+ return ret;
+}
+
+static int mod_process(const struct mod_list_t *list, int do_insert)
+{
+ int rc = 0;
+ char **argv = NULL;
+ struct mod_opt_t *opts;
+ int argc_malloc; /* never used when CONFIG_FEATURE_CLEAN_UP not defined */
+ int argc;
+
+ while (list) {
+ argc = 0;
+ if (ENABLE_FEATURE_CLEAN_UP)
+ argc_malloc = 0;
+ /* If CONFIG_FEATURE_CLEAN_UP is not defined, then we leak memory
+ * each time we allocate memory for argv.
+ * But it is (quite) small amounts of memory that leak each
+ * time a module is loaded, and it is reclaimed when modprobe
+ * exits anyway (even when standalone shell?).
+ * This could become a problem when loading a module with LOTS of
+ * dependencies, with LOTS of options for each dependencies, with
+ * very little memory on the target... But in that case, the module
+ * would not load because there is no more memory, so there's no
+ * problem. */
+ /* enough for minimal insmod (5 args + NULL) or rmmod (3 args + NULL) */
+ argv = xmalloc(6 * sizeof(char*));
+ if (do_insert) {
+ if (already_loaded(list->m_name) != 1) {
+ argv[argc++] = (char*)"insmod";
+ if (ENABLE_FEATURE_2_4_MODULES) {
+ if (do_syslog)
+ argv[argc++] = (char*)"-s";
+ if (autoclean)
+ argv[argc++] = (char*)"-k";
+ if (quiet)
+ argv[argc++] = (char*)"-q";
+ else if (verbose) /* verbose and quiet are mutually exclusive */
+ argv[argc++] = (char*)"-v";
+ }
+ argv[argc++] = list->m_path;
+ if (ENABLE_FEATURE_CLEAN_UP)
+ argc_malloc = argc;
+ opts = list->m_options;
+ while (opts) {
+ /* Add one more option */
+ argc++;
+ argv = xrealloc(argv,(argc + 1)* sizeof(char*));
+ argv[argc-1] = opts->m_opt_val;
+ opts = opts->m_next;
+ }
+ }
+ } else {
+ /* modutils uses short name for removal */
+ if (already_loaded(list->m_name) != 0) {
+ argv[argc++] = (char*)"rmmod";
+ if (do_syslog)
+ argv[argc++] = (char*)"-s";
+ argv[argc++] = (char*)list->m_name;
+ if (ENABLE_FEATURE_CLEAN_UP)
+ argc_malloc = argc;
+ }
+ }
+ argv[argc] = NULL;
+
+ if (argc) {
+ if (verbose) {
+ printf("%s module %s\n", do_insert?"Loading":"Unloading", list->m_name);
+ }
+ if (!show_only) {
+ int rc2 = wait4pid(spawn(argv));
+
+ if (do_insert) {
+ rc = rc2; /* only last module matters */
+ } else if (!rc2) {
+ rc = 0; /* success if remove any mod */
+ }
+ }
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ /* the last value in the array has index == argc, but
+ * it is the terminating NULL, so we must not free it. */
+ while (argc_malloc < argc) {
+ free(argv[argc_malloc++]);
+ }
+ }
+ }
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(argv);
+ argv = NULL;
+ }
+ list = do_insert ? list->m_prev : list->m_next;
+ }
+ return (show_only) ? 0 : rc;
+}
+
+/*
+ * Check the matching between a pattern and a module name.
+ * We need this as *_* is equivalent to *-*, even in pattern matching.
+ */
+static int check_pattern(const char* pat_src, const char* mod_src) {
+ int ret;
+
+ if (ENABLE_FEATURE_MODPROBE_FANCY_ALIAS) {
+ char* pat;
+ char* mod;
+ char* p;
+
+ pat = xstrdup (pat_src);
+ mod = xstrdup (mod_src);
+
+ for (p = pat; (p = strchr(p, '-')); *p++ = '_');
+ for (p = mod; (p = strchr(p, '-')); *p++ = '_');
+
+ ret = fnmatch(pat, mod, 0);
+
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free (pat);
+ free (mod);
+ }
+
+ return ret;
+ } else {
+ return fnmatch(pat_src, mod_src, 0);
+ }
+}
+
+/*
+ * Builds the dependency list (aka stack) of a module.
+ * head: the highest module in the stack (last to insmod, first to rmmod)
+ * tail: the lowest module in the stack (first to insmod, last to rmmod)
+ */
+static void check_dep(char *mod, struct mod_list_t **head, struct mod_list_t **tail)
+{
+ struct mod_list_t *find;
+ struct dep_t *dt;
+ struct mod_opt_t *opt = 0;
+ char *path = 0;
+
+ /* Search for the given module name amongst all dependency rules.
+ * The module name in a dependency rule can be a shell pattern,
+ * so try to match the given module name against such a pattern.
+ * Of course if the name in the dependency rule is a plain string,
+ * then we consider it a pattern, and matching will still work. */
+ for (dt = depend; dt; dt = dt->m_next) {
+ if (check_pattern(dt->m_name, mod) == 0) {
+ break;
+ }
+ }
+
+ if (!dt) {
+ bb_error_msg("module %s not found", mod);
+ return;
+ }
+
+ // resolve alias names
+ while (dt->m_isalias) {
+ if (dt->m_depcnt == 1) {
+ struct dep_t *adt;
+
+ for (adt = depend; adt; adt = adt->m_next) {
+ if (check_pattern(adt->m_name, dt->m_deparr[0]) == 0)
+ break;
+ }
+ if (adt) {
+ /* This is the module we are aliased to */
+ struct mod_opt_t *opts = dt->m_options;
+ /* Option of the alias are appended to the options of the module */
+ while (opts) {
+ adt->m_options = append_option(adt->m_options, opts->m_opt_val);
+ opts = opts->m_next;
+ }
+ dt = adt;
+ } else {
+ bb_error_msg("module %s not found", mod);
+ return;
+ }
+ } else {
+ bb_error_msg("bad alias %s", dt->m_name);
+ return;
+ }
+ }
+
+ mod = dt->m_name;
+ path = dt->m_path;
+ opt = dt->m_options;
+
+ // search for duplicates
+ for (find = *head; find; find = find->m_next) {
+ if (!strcmp(mod, find->m_name)) {
+ // found ->dequeue it
+
+ if (find->m_prev)
+ find->m_prev->m_next = find->m_next;
+ else
+ *head = find->m_next;
+
+ if (find->m_next)
+ find->m_next->m_prev = find->m_prev;
+ else
+ *tail = find->m_prev;
+
+ break; // there can be only one duplicate
+ }
+ }
+
+ if (!find) { // did not find a duplicate
+ find = xmalloc(sizeof(struct mod_list_t));
+ find->m_name = mod;
+ find->m_path = path;
+ find->m_options = opt;
+ }
+
+ // enqueue at tail
+ if (*tail)
+ (*tail)->m_next = find;
+ find->m_prev = *tail;
+ find->m_next = 0;
+
+ if (!*head)
+ *head = find;
+ *tail = find;
+
+ if (dt) {
+ int i;
+
+ /* Add all dependable module for that new module */
+ for (i = 0; i < dt->m_depcnt; i++)
+ check_dep(dt->m_deparr[i], head, tail);
+ }
+}
+
+static int mod_insert(char *mod, int argc, char **argv)
+{
+ struct mod_list_t *tail = NULL;
+ struct mod_list_t *head = NULL;
+ int rc;
+
+ // get dep list for module mod
+ check_dep(mod, &head, &tail);
+
+ rc = 1;
+ if (head && tail) {
+ if (argc) {
+ int i;
+ // append module args
+ for (i = 0; i < argc; i++)
+ head->m_options = append_option(head->m_options, argv[i]);
+ }
+
+ // process tail ---> head
+ rc = mod_process(tail, 1);
+ if (rc) {
+ /*
+ * In case of using udev, multiple instances of modprobe can be
+ * spawned to load the same module (think of two same usb devices,
+ * for example; or cold-plugging at boot time). Thus we shouldn't
+ * fail if the module was loaded, and not by us.
+ */
+ if (already_loaded(mod))
+ rc = 0;
+ }
+ }
+ return rc;
+}
+
+static int mod_remove(char *mod)
+{
+ int rc;
+ static const struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL };
+
+ struct mod_list_t *head = NULL;
+ struct mod_list_t *tail = NULL;
+
+ if (mod)
+ check_dep(mod, &head, &tail);
+ else // autoclean
+ head = tail = (struct mod_list_t*) &rm_a_dummy;
+
+ rc = 1;
+ if (head && tail)
+ rc = mod_process(head, 0); // process head ---> tail
+ return rc;
+}
+
+int modprobe_main(int argc, char** argv);
+int modprobe_main(int argc, char** argv)
+{
+ int rc = EXIT_SUCCESS;
+ char *unused;
+
+ opt_complementary = "?V-:q-v:v-q";
+ main_opts = getopt32(argc, argv, "acdklnqrst:vVC:",
+ &unused, &unused);
+ if (main_opts & (DUMP_CONF_EXIT | LIST_ALL))
+ return EXIT_SUCCESS;
+ if (main_opts & (RESTRICT_DIR | CONFIG_FILE))
+ bb_error_msg_and_die("-t and -C not supported");
+
+ depend = build_dep();
+
+ if (!depend)
+ bb_error_msg_and_die("cannot parse modules.dep");
+
+ if (remove_opt) {
+ do {
+ if (mod_remove(optind < argc ?
+ argv[optind] : NULL)) {
+ bb_error_msg("failed to remove module %s",
+ argv[optind]);
+ rc = EXIT_FAILURE;
+ }
+ } while (++optind < argc);
+ } else {
+ if (optind >= argc)
+ bb_error_msg_and_die("no module or pattern provided");
+
+ if (mod_insert(argv[optind], argc - optind - 1, argv + optind + 1))
+ bb_error_msg_and_die("failed to load module %s", argv[optind]);
+ }
+
+ /* Here would be a good place to free up memory allocated during the dependencies build. */
+
+ return rc;
+}