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@ -52,7 +52,7 @@ struct globals {
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#define G (*(struct globals*)&bb_common_bufsiz1)
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#define root_major (G.root_major)
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#define root_minor (G.root_minor)
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#define subsystem (G.subsystem)
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#define subsystem (G.subsystem )
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/* Prevent infinite loops in /sys symlinks */
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#define MAX_SYSFS_DEPTH 3
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@ -60,9 +60,9 @@ struct globals {
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/* We use additional 64+ bytes in make_device() */
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#define SCRATCH_SIZE 80
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#if ENABLE_FEATURE_MDEV_RENAME
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/* Builds an alias path.
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* This function potentionally reallocates the alias parameter.
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* Only used for ENABLE_FEATURE_MDEV_RENAME
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*/
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static char *build_alias(char *alias, const char *device_name)
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{
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@ -84,19 +84,16 @@ static char *build_alias(char *alias, const char *device_name)
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return alias;
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}
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#endif
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/* mknod in /dev based on a path like "/sys/block/hda/hda1" */
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/* NB: "mdev -s" may call us many times, do not leak memory/fds! */
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static void make_device(char *path, int delete)
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{
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#if ENABLE_FEATURE_MDEV_CONF
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parser_t *parser;
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#endif
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const char *device_name;
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int major, minor, type, len;
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int mode;
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char *dev_maj_min = path + strlen(path);
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parser_t *parser;
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/* Force the configuration file settings exactly. */
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umask(0);
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@ -137,34 +134,28 @@ static void make_device(char *path, int delete)
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else
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path += sizeof("/sys/class/") - 1;
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#if !ENABLE_FEATURE_MDEV_CONF
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mode = 0660;
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#else
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/* If we have config file, look up user settings */
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if (ENABLE_FEATURE_MDEV_CONF)
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parser = config_open2("/etc/mdev.conf", fopen_for_read);
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while (1) {
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do {
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regmatch_t off[1 + 9 * ENABLE_FEATURE_MDEV_RENAME_REGEXP];
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int keep_matching;
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char *val, *name;
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struct bb_uidgid_t ugid;
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char *tokens[4];
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# if ENABLE_FEATURE_MDEV_EXEC
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char *command = NULL;
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# endif
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# if ENABLE_FEATURE_MDEV_RENAME
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char *alias = NULL;
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char aliaslink = aliaslink; /* for compiler */
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# endif
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/* Defaults in case we won't match any line */
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ugid.uid = ugid.gid = 0;
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keep_matching = 0;
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mode = 0660;
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if (!config_read(parser, tokens, 4, 3, "# \t", PARSE_NORMAL)) {
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/* End of file, create dev node with default params */
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goto line_matches;
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}
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if (ENABLE_FEATURE_MDEV_CONF
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&& config_read(parser, tokens, 4, 3, "# \t", PARSE_NORMAL)
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) {
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val = tokens[0];
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keep_matching = ('-' == val[0]);
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val += keep_matching; /* swallow leading dash */
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@ -228,16 +219,14 @@ static void make_device(char *path, int delete)
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val = tokens[3];
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/* 4th field (opt): >|=alias */
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# if ENABLE_FEATURE_MDEV_RENAME
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if (!val)
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goto line_matches;
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if (ENABLE_FEATURE_MDEV_RENAME && val) {
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aliaslink = val[0];
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if (aliaslink == '>' || aliaslink == '=') {
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char *a, *s, *st;
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# if ENABLE_FEATURE_MDEV_RENAME_REGEXP
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char *p;
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unsigned i, n;
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# endif
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a = val;
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s = strchrnul(val, ' ');
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st = strchrnul(val, '\t');
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@ -246,7 +235,7 @@ static void make_device(char *path, int delete)
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val = (s[0] && s[1]) ? s+1 : NULL;
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s[0] = '\0';
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# if ENABLE_FEATURE_MDEV_RENAME_REGEXP
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if (ENABLE_FEATURE_MDEV_RENAME_REGEXP) {
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/* substitute %1..9 with off[1..9], if any */
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n = 0;
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s = a;
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@ -270,37 +259,28 @@ static void make_device(char *path, int delete)
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p++;
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s++;
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}
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# else
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} else {
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alias = xstrdup(a + 1);
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# endif
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}
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# endif /* ENABLE_FEATURE_MDEV_RENAME */
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}
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}
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# if ENABLE_FEATURE_MDEV_EXEC
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/* The rest (opt): @|$|*command */
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if (!val)
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goto line_matches;
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{
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const char *s = "@$*";
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if (ENABLE_FEATURE_MDEV_EXEC && val) {
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const char *s = "$@*";
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const char *s2 = strchr(s, val[0]);
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if (!s2)
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bb_error_msg_and_die("bad line %u", parser->lineno);
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/* Correlate the position in the "@$*" with the delete
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* step so that we get the proper behavior:
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* @cmd: run on create
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* $cmd: run on delete
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* *cmd: run on both
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/* Are we running this command now?
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* Run $cmd on delete, @cmd on create, *cmd on both
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*/
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if ((s2 - s + 1) /*1/2/3*/ & /*1/2*/ (1 + delete)) {
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if (s2-s != delete)
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command = xstrdup(val + 1);
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}
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}
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# endif
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/* End of field parsing */
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line_matches:
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#endif /* ENABLE_FEATURE_MDEV_CONF */
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/* "Execute" the line we found */
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@ -311,11 +291,11 @@ static void make_device(char *path, int delete)
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bb_perror_msg_and_die("mknod %s", device_name);
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if (major == root_major && minor == root_minor)
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symlink(device_name, "root");
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#if ENABLE_FEATURE_MDEV_CONF
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if (ENABLE_FEATURE_MDEV_CONF) {
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chmod(device_name, mode);
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chown(device_name, ugid.uid, ugid.gid);
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# if ENABLE_FEATURE_MDEV_RENAME
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if (alias) {
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}
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if (ENABLE_FEATURE_MDEV_RENAME && alias) {
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alias = build_alias(alias, device_name);
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/* move the device, and optionally
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* make a symlink to moved device node */
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@ -323,11 +303,9 @@ static void make_device(char *path, int delete)
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symlink(alias, device_name);
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free(alias);
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}
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# endif
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#endif
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}
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#if ENABLE_FEATURE_MDEV_EXEC
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if (command) {
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if (ENABLE_FEATURE_MDEV_EXEC && command) {
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/* setenv will leak memory, use putenv/unsetenv/free */
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char *s = xasprintf("%s=%s", "MDEV", device_name);
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char *s1 = xasprintf("%s=%s", "SUBSYSTEM", subsystem);
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@ -341,29 +319,29 @@ static void make_device(char *path, int delete)
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free(s);
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free(command);
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}
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#endif
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if (delete) {
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unlink(device_name);
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/* At creation time, device might have been moved
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* and a symlink might have been created. Undo that. */
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#if ENABLE_FEATURE_MDEV_RENAME
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if (alias) {
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if (ENABLE_FEATURE_MDEV_RENAME && alias) {
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alias = build_alias(alias, device_name);
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unlink(alias);
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free(alias);
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}
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#endif
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}
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#if ENABLE_FEATURE_MDEV_CONF
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/* We found matching line.
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* Stop unless it was prefixed with '-' */
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if (!keep_matching)
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if (ENABLE_FEATURE_MDEV_CONF && !keep_matching)
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break;
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} /* end of "while line is read from /etc/mdev.conf" */
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/* end of "while line is read from /etc/mdev.conf" */
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} while (ENABLE_FEATURE_MDEV_CONF);
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if (ENABLE_FEATURE_MDEV_CONF)
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config_close(parser);
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#endif /* ENABLE_FEATURE_MDEV_CONF */
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}
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/* File callback for /sys/ traversal */
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@ -415,7 +393,7 @@ static int FAST_FUNC dirAction(const char *fileName UNUSED_PARAM,
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* - userspace writes "0" (worked) or "-1" (failed) to /sys/$DEVPATH/loading
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* - kernel loads firmware into device
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*/
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static void load_firmware(const char *const firmware, const char *const sysfs_path)
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static void load_firmware(const char *firmware, const char *sysfs_path)
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{
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int cnt;
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int firmware_fd, loading_fd, data_fd;
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@ -469,18 +447,8 @@ int mdev_main(int argc UNUSED_PARAM, char **argv)
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/* We can be called as hotplug helper */
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/* Kernel cannot provide suitable stdio fds for us, do it ourself */
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#if 1
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bb_sanitize_stdio();
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#else
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/* Debug code */
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/* Replace LOGFILE by other file or device name if you need */
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#define LOGFILE "/dev/console"
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/* Just making sure fd 0 is not closed,
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* we don't really intend to read from it */
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xmove_fd(xopen("/", O_RDONLY), STDIN_FILENO);
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xmove_fd(xopen(LOGFILE, O_WRONLY|O_APPEND), STDOUT_FILENO);
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xmove_fd(xopen(LOGFILE, O_WRONLY|O_APPEND), STDERR_FILENO);
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#endif
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xchdir("/dev");
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