diff options
| -rw-r--r-- | util-linux/mdev.c | 154 |
1 files changed, 82 insertions, 72 deletions
diff --git a/util-linux/mdev.c b/util-linux/mdev.c index 63b5553..8205a26 100644 --- a/util-linux/mdev.c +++ b/util-linux/mdev.c @@ -1047,6 +1047,86 @@ static void signal_mdevs(unsigned my_pid) } } +static void process_action(char *temp, unsigned my_pid) +{ + char *fw; + char *seq; + char *action; + char *env_devname; + char *env_devpath; + unsigned seqnum = seqnum; /* for compiler */ + int seq_fd; + smalluint op; + + /* Hotplug: + * env ACTION=... DEVPATH=... SUBSYSTEM=... [SEQNUM=...] mdev + * ACTION can be "add", "remove", "change" + * DEVPATH is like "/block/sda" or "/class/input/mice" + */ + env_devname = getenv("DEVNAME"); /* can be NULL */ + G.subsystem = getenv("SUBSYSTEM"); + action = getenv("ACTION"); + env_devpath = getenv("DEVPATH"); + if (!action || !env_devpath /*|| !G.subsystem*/) + bb_show_usage(); + fw = getenv("FIRMWARE"); + seq = getenv("SEQNUM"); + op = index_in_strings(keywords, action); + + open_mdev_log(seq, my_pid); + + seq_fd = -1; + if (seq) { + seqnum = atoll(seq); + seq_fd = wait_for_seqfile(seqnum); + } + + dbg1("%s " + "ACTION:%s SEQNUM:%s SUBSYSTEM:%s DEVNAME:%s DEVPATH:%s" + "%s%s", + curtime(), + action, seq, G.subsystem, env_devname, env_devpath, + fw ? " FW:" : "", fw ? fw : "" + ); + + snprintf(temp, PATH_MAX, "/sys%s", env_devpath); + if (op == OP_remove) { + /* Ignoring "remove firmware". It was reported + * to happen and to cause erroneous deletion + * of device nodes. */ + if (!fw) + make_device(env_devname, temp, op); + } + else { + make_device(env_devname, temp, op); + if (ENABLE_FEATURE_MDEV_LOAD_FIRMWARE) { + if (op == OP_add && fw) + load_firmware(fw, temp); + } + } + + if (seq_fd >= 0) { + xwrite_str(seq_fd, utoa(seqnum + 1)); + signal_mdevs(my_pid); + } +} + +static void initial_scan(char *temp) +{ + struct stat st; + + xstat("/", &st); + G.root_major = major(st.st_dev); + G.root_minor = minor(st.st_dev); + + putenv((char*)"ACTION=add"); + + /* Create all devices from /sys/dev hierarchy */ + recursive_action("/sys/dev", + ACTION_RECURSE | ACTION_FOLLOWLINKS, + fileAction, dirAction, temp, 0); +} + int mdev_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int mdev_main(int argc UNUSED_PARAM, char **argv) { @@ -1071,86 +1151,16 @@ int mdev_main(int argc UNUSED_PARAM, char **argv) /* * Scan: mdev -s */ - struct stat st; - #if ENABLE_FEATURE_MDEV_CONF /* Same as xrealloc_vector(NULL, 4, 0): */ G.rule_vec = xzalloc((1 << 4) * sizeof(*G.rule_vec)); #endif - xstat("/", &st); - G.root_major = major(st.st_dev); - G.root_minor = minor(st.st_dev); - putenv((char*)"ACTION=add"); - - /* Create all devices from /sys/dev hierarchy */ - recursive_action("/sys/dev", - ACTION_RECURSE | ACTION_FOLLOWLINKS, - fileAction, dirAction, temp, 0); + initial_scan(temp); } else { - char *fw; - char *seq; - char *action; - char *env_devname; - char *env_devpath; - unsigned my_pid; - unsigned seqnum = seqnum; /* for compiler */ - int seq_fd; - smalluint op; - - /* Hotplug: - * env ACTION=... DEVPATH=... SUBSYSTEM=... [SEQNUM=...] mdev - * ACTION can be "add", "remove", "change" - * DEVPATH is like "/block/sda" or "/class/input/mice" - */ - env_devname = getenv("DEVNAME"); /* can be NULL */ - G.subsystem = getenv("SUBSYSTEM"); - action = getenv("ACTION"); - env_devpath = getenv("DEVPATH"); - if (!action || !env_devpath /*|| !G.subsystem*/) - bb_show_usage(); - fw = getenv("FIRMWARE"); - seq = getenv("SEQNUM"); - op = index_in_strings(keywords, action); - - my_pid = getpid(); - open_mdev_log(seq, my_pid); - - seq_fd = -1; - if (seq) { - seqnum = atoll(seq); - seq_fd = wait_for_seqfile(seqnum); - } - - dbg1("%s " - "ACTION:%s SUBSYSTEM:%s DEVNAME:%s DEVPATH:%s" - "%s%s", - curtime(), - action, G.subsystem, env_devname, env_devpath, - fw ? " FW:" : "", fw ? fw : "" - ); - - snprintf(temp, PATH_MAX, "/sys%s", env_devpath); - if (op == OP_remove) { - /* Ignoring "remove firmware". It was reported - * to happen and to cause erroneous deletion - * of device nodes. */ - if (!fw) - make_device(env_devname, temp, op); - } - else { - make_device(env_devname, temp, op); - if (ENABLE_FEATURE_MDEV_LOAD_FIRMWARE) { - if (op == OP_add && fw) - load_firmware(fw, temp); - } - } + process_action(temp, getpid()); dbg1("%s exiting", curtime()); - if (seq_fd >= 0) { - xwrite_str(seq_fd, utoa(seqnum + 1)); - signal_mdevs(my_pid); - } } if (ENABLE_FEATURE_CLEAN_UP) |