diff options
Diffstat (limited to 'usr.sbin/hotplugd/hotplugd.c')
| -rw-r--r-- | usr.sbin/hotplugd/hotplugd.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/usr.sbin/hotplugd/hotplugd.c b/usr.sbin/hotplugd/hotplugd.c new file mode 100644 index 00000000000..2f18d7b9159 --- /dev/null +++ b/usr.sbin/hotplugd/hotplugd.c @@ -0,0 +1,163 @@ +/* $OpenBSD: hotplugd.c,v 1.1 2004/05/30 08:28:28 grange Exp $ */ +/* + * Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * Devices hot plugging daemon. + */ + +#include <sys/types.h> +#include <sys/device.h> +#include <sys/hotplug.h> +#include <sys/wait.h> + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <libgen.h> +#include <signal.h> +#include <stdarg.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <syslog.h> +#include <unistd.h> + +#define _PATH_DEV_HOTPLUG "/dev/hotplug" +#define _PATH_ETC_HOTPLUG "/etc/hotplug" +#define _PATH_ETC_HOTPLUG_ATTACH _PATH_ETC_HOTPLUG "/attach" +#define _PATH_ETC_HOTPLUG_DETACH _PATH_ETC_HOTPLUG "/detach" + +volatile sig_atomic_t quit = 0; +char *device = _PATH_DEV_HOTPLUG; +int devfd = -1; + +void exec_script(const char *, int, char *); + +void sigquit(int); +__dead void usage(void); + +int +main(int argc, char *argv[]) +{ + int ch; + struct sigaction sact; + struct hotplug_event he; + + while ((ch = getopt(argc, argv, "d:")) != -1) + switch (ch) { + case 'd': + device = optarg; + break; + case '?': + default: + usage(); + /* NOTREACHED */ + } + + if ((devfd = open(device, O_RDONLY)) == -1) + err(1, "%s", device); + + bzero(&sact, sizeof(sact)); + sigemptyset(&sact.sa_mask); + sact.sa_flags = 0; + sact.sa_handler = sigquit; + sigaction(SIGINT, &sact, NULL); + sigaction(SIGQUIT, &sact, NULL); + sigaction(SIGTERM, &sact, NULL); + sact.sa_handler = SIG_IGN; + sigaction(SIGHUP, &sact, NULL); + + openlog("hotplugd", LOG_NDELAY | LOG_PID, LOG_DAEMON); + if (daemon(0, 0) == -1) + err(1, "daemon"); + + syslog(LOG_INFO, "started"); + + while (!quit) { + if (read(devfd, &he, sizeof(he)) == -1) { + if (errno == EINTR) + /* ignore */ + continue; + syslog(LOG_ERR, "read: %m"); + exit(1); + } + + switch (he.he_type) { + case HOTPLUG_DEVAT: + syslog(LOG_INFO, "%s attached, class %d", + he.he_devname, he.he_devclass); + exec_script(_PATH_ETC_HOTPLUG_ATTACH, he.he_devclass, + he.he_devname); + break; + case HOTPLUG_DEVDT: + syslog(LOG_INFO, "%s detached, class %d", + he.he_devname, he.he_devclass); + exec_script(_PATH_ETC_HOTPLUG_DETACH, he.he_devclass, + he.he_devname); + break; + default: + syslog(LOG_NOTICE, "unknown event (0x%x)", he.he_type); + } + } + + syslog(LOG_INFO, "terminated"); + + closelog(); + close(devfd); + + return (0); +} + +void +exec_script(const char *file, int class, char *name) +{ + char strclass[8]; + pid_t pid; + + snprintf(strclass, sizeof(strclass), "%d", class); + + if (access(file, X_OK | R_OK)) + /* do nothing if file can't be accessed */ + return; + + if ((pid = fork()) == -1) { + syslog(LOG_ERR, "fork: %m"); + return; + } + if (pid == 0) { + /* child process */ + execl(file, basename(file), strclass, name, (char *)NULL); + syslog(LOG_ERR, "execl: %m"); + _exit(1); + /* NOTREACHED */ + } +} + +void +sigquit(int signum) +{ + quit = 1; +} + +__dead void +usage(void) +{ + extern char *__progname; + + fprintf(stderr, "usage: %s [-d device]\n", __progname); + exit(1); +} |