From 2b996ad19339858ab702c27c9976581ca6784628 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Thu, 11 Aug 2005 20:34:24 +0200 Subject: [PATCH] add Usage: to udevmonitor and udevcontrol Signed-off-by: Kay Sievers --- udevcontrol.c | 60 +++++++++++++++++++++++++++++++++------------------ udevd.c | 16 ++++++++------ udevmonitor.c | 46 ++++++++++++++++++++++++++++----------- 3 files changed, 82 insertions(+), 40 deletions(-) diff --git a/udevcontrol.c b/udevcontrol.c index 5d8fa7768..f16f6a125 100644 --- a/udevcontrol.c +++ b/udevcontrol.c @@ -64,6 +64,7 @@ int main(int argc, char *argv[], char *envp[]) const char *env; const char *val; int *intval; + int i; int retval = 1; env = getenv("UDEV_LOG"); @@ -73,33 +74,50 @@ int main(int argc, char *argv[], char *envp[]) logging_init("udevcontrol"); dbg("version %s", UDEV_VERSION); - if (argc != 2) { - err("error finding comand"); + if (argc < 2) { + fprintf(stderr, "missing command\n\n"); goto exit; } memset(&usend_msg, 0x00, sizeof(struct udevd_msg)); strcpy(usend_msg.magic, UDEV_MAGIC); - if (!strcmp(argv[1], "stop_exec_queue")) - usend_msg.type = UDEVD_STOP_EXEC_QUEUE; - else if (!strcmp(argv[1], "start_exec_queue")) - usend_msg.type = UDEVD_START_EXEC_QUEUE; - else if (!strncmp(argv[1], "log_priority=", strlen("log_priority="))) { - intval = (int *) usend_msg.envbuf; - val = &argv[1][strlen("log_priority=")]; - usend_msg.type = UDEVD_SET_LOG_LEVEL; - *intval = log_priority(val); - info("send log_priority=%i", *intval); - } else if (!strncmp(argv[1], "max_childs=", strlen("max_childs="))) { - intval = (int *) usend_msg.envbuf; - val = &argv[1][strlen("max_childs=")]; - usend_msg.type = UDEVD_SET_MAX_CHILDS; - *intval = atoi(val); - info("send max_childs=%i", *intval); - } else { - err("error parsing command\n"); - goto exit; + for (i = 1 ; i < argc; i++) { + char *arg = argv[i]; + + if (!strcmp(arg, "stop_exec_queue")) + usend_msg.type = UDEVD_STOP_EXEC_QUEUE; + else if (!strcmp(arg, "start_exec_queue")) + usend_msg.type = UDEVD_START_EXEC_QUEUE; + else if (!strncmp(arg, "log_priority=", strlen("log_priority="))) { + intval = (int *) usend_msg.envbuf; + val = &arg[strlen("log_priority=")]; + usend_msg.type = UDEVD_SET_LOG_LEVEL; + *intval = log_priority(val); + info("send log_priority=%i", *intval); + } else if (!strncmp(arg, "max_childs=", strlen("max_childs="))) { + intval = (int *) usend_msg.envbuf; + val = &arg[strlen("max_childs=")]; + usend_msg.type = UDEVD_SET_MAX_CHILDS; + *intval = atoi(val); + info("send max_childs=%i", *intval); + } else if (strcmp(arg, "help") == 0 || strcmp(arg, "--help") == 0 || strcmp(arg, "-h") == 0) { + printf("Usage: udevcontrol COMMAND\n" + " log_priority= set the udev log level for the daemon\n" + " stop_exec_queue keep udevd from executing events, queue only\n" + " start_exec_queue execute events, flush queue\n" + " max_childs= maximum number of childs running at the same time\n" + " --help print this help text\n\n"); + exit(0); + } else { + fprintf(stderr, "unknown option\n\n"); + exit(1); + } + } + + if (getuid() != 0) { + fprintf(stderr, "need to be root, exit\n\n"); + exit(1); } sock = socket(AF_LOCAL, SOCK_DGRAM, 0); diff --git a/udevd.c b/udevd.c index d51ed2f7b..1575da8d5 100644 --- a/udevd.c +++ b/udevd.c @@ -54,7 +54,7 @@ static int udevd_sock; static int uevent_netlink_sock; static pid_t sid; -static int pipefds[2]; +static int pipefds[2] = {-1, -1}; static volatile int sigchilds_waiting; static volatile int run_msg_q; static volatile int sig_flag; @@ -843,11 +843,10 @@ int main(int argc, char *argv[], char *envp[]) /* Set fds to dev/null */ fd = open( "/dev/null", O_RDWR ); if (fd >= 0) { - dup2(fd, 0); - dup2(fd, 1); - dup2(fd, 2); - if (fd > 2) - close(fd); + dup2(fd, STDIN_FILENO); + dup2(fd, STDOUT_FILENO); + dup2(fd, STDERR_FILENO); + close(fd); } else err("error opening /dev/null %s", strerror(errno)); @@ -1012,6 +1011,11 @@ int main(int argc, char *argv[], char *envp[]) } exit: + if (pipefds[0] > 0) + close(pipefds[0]); + if (pipefds[1] > 0) + close(pipefds[1]); + if (udevd_sock > 0) close(udevd_sock); diff --git a/udevmonitor.c b/udevmonitor.c index 3a71d002f..2efb705b6 100644 --- a/udevmonitor.c +++ b/udevmonitor.c @@ -33,6 +33,7 @@ #include "udev.h" #include "udevd.h" +#include "udev_utils.h" #include "udev_libc_wrapper.h" static int uevent_netlink_sock; @@ -102,25 +103,42 @@ static int init_uevent_netlink_sock(void) int main(int argc, char *argv[]) { int env = 0; - int maxsockplus; fd_set readfds; + int i; int retval; + for (i = 1 ; i < argc; i++) { + char *arg = argv[i]; + if (strcmp(arg, "--env") == 0 || strcmp(arg, "-e") == 0) { + env = 1; + } + else if (strcmp(arg, "--help") == 0 || strcmp(arg, "-h") == 0){ + printf("Usage: udevmonitor [--env]\n" + " --env print the whole event environment\n" + " --help print this help text\n\n"); + exit(0); + } else { + fprintf(stderr, "unknown option\n\n"); + exit(1); + } + } + if (getuid() != 0) { - printf("need to be root, exit\n"); + fprintf(stderr, "need to be root, exit\n\n"); exit(1); } - if (argc == 2 && strstr(argv[1], "--env")) - env = 1; - init_uevent_netlink_sock(); init_udev_monitor_socket(); + printf("udevmonitor prints received from the kernel [UEVENT] and after\n" + "the udev processing, the event which udev [UDEV] has generated\n\n"); + FD_ZERO(&readfds); - FD_SET(uevent_netlink_sock, &readfds); - FD_SET(udev_monitor_sock, &readfds); - maxsockplus = udev_monitor_sock+1; + if (uevent_netlink_sock > 0) + FD_SET(uevent_netlink_sock, &readfds); + if (udev_monitor_sock > 0) + FD_SET(udev_monitor_sock, &readfds); while (1) { static char buf[UEVENT_BUFFER_SIZE*2]; @@ -130,14 +148,14 @@ int main(int argc, char *argv[]) buflen = 0; workreadfds = readfds; - retval = select(maxsockplus, &workreadfds, NULL, NULL, NULL); + retval = select(UDEV_MAX(uevent_netlink_sock, udev_monitor_sock)+1, &workreadfds, NULL, NULL, NULL); if (retval < 0) { if (errno != EINTR) fprintf(stderr, "error receiving uevent message\n"); continue; } - if (FD_ISSET(uevent_netlink_sock, &workreadfds)) { + if ((uevent_netlink_sock > 0) && FD_ISSET(uevent_netlink_sock, &workreadfds)) { buflen = recv(uevent_netlink_sock, &buf, sizeof(buf), 0); if (buflen <= 0) { fprintf(stderr, "error receiving uevent message\n"); @@ -146,7 +164,7 @@ int main(int argc, char *argv[]) printf("UEVENT[%i] %s\n", time(NULL), buf); } - if (FD_ISSET(udev_monitor_sock, &workreadfds)) { + if ((udev_monitor_sock > 0) && FD_ISSET(udev_monitor_sock, &workreadfds)) { buflen = recv(udev_monitor_sock, &buf, sizeof(buf), 0); if (buflen <= 0) { fprintf(stderr, "error receiving udev message\n"); @@ -180,7 +198,9 @@ int main(int argc, char *argv[]) } } - close(uevent_netlink_sock); - close(udev_monitor_sock); + if (uevent_netlink_sock > 0) + close(uevent_netlink_sock); + if (udev_monitor_sock > 0) + close(udev_monitor_sock); exit(1); } -- 2.30.2