diff options
Diffstat (limited to 'btime')
| -rw-r--r-- | btime/Makefile | 48 | ||||
| -rw-r--r-- | btime/btime.c | 111 | ||||
| -rw-r--r-- | btime/btime.h | 10 | ||||
| -rw-r--r-- | btime/btime_int.h | 12 | ||||
| -rw-r--r-- | btime/btimec.c | 28 | ||||
| -rw-r--r-- | btime/btimed.c | 271 |
6 files changed, 0 insertions, 480 deletions
diff --git a/btime/Makefile b/btime/Makefile deleted file mode 100644 index 6a2a454..0000000 --- a/btime/Makefile +++ /dev/null @@ -1,48 +0,0 @@ -include ../../make/defines.mk - -.PHONY: clean clobber uninstall - -CC = gcc -AR = ar -#CFLAGS += -g - -all: libbtime.a btimed btimec - -btimed: btimed.c btime_int.h - $(CC) $(CFLAGS) -o btimed btimed.c - -btimec: btimec.c libbtime.a - $(CC) $(CFLAGS) -L. -o btimec btimec.c -lbtime - -libbtime.a: btime.c btime_int.h - $(CC) $(CFLAGS) -c btime.c - $(AR) -rc libbtime.a btime.o - -install: btimed btimec libbtime.a - @echo "Installing btime deamon and test client" - @install -d ${STSDIR}/bin/ - @install btimed ${STSDIR}/bin - @install btimec ${STSDIR}/bin - - @echo "Installing btime library" - @install -d ${STSDIR}/lib/ - @install libbtime.a ${STSDIR}/lib - - @echo "Installing btime header" - @install -d ${STSDIR}/include/ - @install btime.h ${STSDIR}/include - - -uninstall: - ${UNINSTALL} btimed ${STSDIR}/bin - ${UNINSTALL} btimec ${STSDIR}/bin - - -clean: - /bin/rm -f *.o - -clobber: - /bin/rm -f btimec - /bin/rm -f btimed - /bin/rm -f *.a *.o - diff --git a/btime/btime.c b/btime/btime.c deleted file mode 100644 index f22c08b..0000000 --- a/btime/btime.c +++ /dev/null @@ -1,111 +0,0 @@ -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <fcntl.h> -#include <errno.h> -#include <netdb.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> - -#include "btime_int.h" - -/* - * btime -- - * - * Return the boot time of a remote host if that host is running the - * btimed deamon. - * - * Returns: - * btime, or 0 on failure. - */ - -unsigned int -btime(const char *host) -{ - int sd; - char msg[BTIME_MSGLEN]; - struct sockaddr_in serv_addr; - struct sockaddr_in my_addr; - int serv_addr_len; - struct hostent *hostent; - in_addr_t inaddr; - unsigned int btime; - ssize_t nbytes; - int retry; - - if ((sd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { - fprintf(stderr, "Could not create socket: %s\n", - strerror(errno)); - return 0; - } - - memset(&serv_addr, 0, sizeof serv_addr); - serv_addr.sin_family = AF_INET; - serv_addr.sin_port = htons(BTIME_PORT); - - if ((inaddr = inet_addr(host)) != INADDR_NONE) { - memcpy(&serv_addr.sin_addr, &inaddr, sizeof inaddr); - } else { - if ((hostent = gethostbyname(host)) == NULL) { - return 0; - } - - memcpy(&serv_addr.sin_addr, hostent->h_addr, hostent->h_length); - } - - memset(&my_addr, 0, sizeof my_addr); - my_addr.sin_family = AF_INET; - my_addr.sin_addr.s_addr = htonl(INADDR_ANY); - my_addr.sin_port = htons(0); - if (bind(sd, (struct sockaddr *)&my_addr, sizeof my_addr) < 0) { - fprintf(stderr, "Could not bind to local address: %s\n", - strerror(errno)); - return 0; - } - - memset(msg, 0, BTIME_MSGLEN); - for (retry = 0; retry < MAX_RETRY; retry++) { - serv_addr_len = sizeof serv_addr; - if ((nbytes = sendto(sd, &msg, BTIME_MSGLEN, MSG_DONTWAIT, - (struct sockaddr *)&serv_addr, serv_addr_len)) < 0) { - if (errno == EAGAIN) { - usleep(retry * 100); - } else { - /* Non EAGAIN error... */ - break; - } - } else { - break; - } - } - - - memset(msg, 0, BTIME_MSGLEN); - for (retry = 0; retry < MAX_RETRY; retry++) { - serv_addr_len = sizeof serv_addr; - if ((nbytes = recvfrom(sd, &msg, BTIME_MSGLEN, MSG_DONTWAIT, - (struct sockaddr *)&serv_addr, &serv_addr_len)) < 0) { - if (errno == EAGAIN) { - usleep(retry * 100); - } else { - /* Non EAGAIN error... */ - break; - } - } else { - break; - } - } - - if (nbytes == 0) { - btime = 0; - } else { - btime = strtoul(msg, (char **)NULL, 10); - } - - close(sd); - - return btime; -} diff --git a/btime/btime.h b/btime/btime.h deleted file mode 100644 index 41d3e39..0000000 --- a/btime/btime.h +++ /dev/null @@ -1,10 +0,0 @@ -/* - * btime.h -- - */ - -#ifndef __BTIME_H -#define __BTIME_H - -extern unsigned int btime(const char *host); - -#endif /* __BTIME_H */ diff --git a/btime/btime_int.h b/btime/btime_int.h deleted file mode 100644 index b2cafcd..0000000 --- a/btime/btime_int.h +++ /dev/null @@ -1,12 +0,0 @@ -/* - * btime_int.h -- - */ - -#ifndef __BTIME_INT_H -#define __BTIME_INT_H - -#define BTIME_PORT 23456 -#define BTIME_MSGLEN 128 -#define MAX_RETRY 5 - -#endif /* __BTIME_INT_H */ diff --git a/btime/btimec.c b/btime/btimec.c deleted file mode 100644 index 02c29bc..0000000 --- a/btime/btimec.c +++ /dev/null @@ -1,28 +0,0 @@ -/* - * btimec.c -- - * - * Example program for libbtime - */ - -#include <stdio.h> -#include <stdlib.h> - -#include "btime.h" - -int -main(int argc, char **argv) -{ - unsigned int bt; - char *btimedhost; - - if (argc != 2) { - fprintf(stderr, "USAGE: %s <host>\n", argv[0]); - exit(2); - } - - btimedhost = argv[1]; - bt = btime(btimedhost); - printf("%s: %u\n", btimedhost, bt); - - exit(0); -} diff --git a/btime/btimed.c b/btime/btimed.c deleted file mode 100644 index 259c8aa..0000000 --- a/btime/btimed.c +++ /dev/null @@ -1,271 +0,0 @@ -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <stdarg.h> -#include <unistd.h> -#include <errno.h> -#include <signal.h> -#include <syslog.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/wait.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> - -#include "btime_int.h" - -static void (*btimed_error)(int level, const char *fmt, ...); - -static void btimed(void); -static unsigned int get_btime(void); -static int daemon_init(void); -static void btimed_perror(int level, const char *fmt, ...); -static void sigchld_hdlr(int sig); -static void usage(const char *progname); - - -int -main(int argc, char **argv) -{ - struct sigaction sa; - int debug = 0; - int c; - - while ((c = getopt(argc, argv, "hd")) != -1) { - switch (c) { - case 'd': - debug = 1; - break; - case 'h': - case '?': - default: - usage(argv[0]); - exit(2); - } - } - - memset(&sa, 0, sizeof(sa)); - sa.sa_handler = sigchld_hdlr; - sigemptyset(&sa.sa_mask); - sa.sa_flags = SA_NOCLDSTOP | SA_RESTART; - sigaction(SIGCHLD, &sa, NULL); - - if (debug) { - btimed_error = btimed_perror; - } else { - btimed_error = syslog; - daemon_init(); - } - - btimed(); - - return 0; -} - - -/* - *--------------------------------------------------------------------------- - * - * btimed -- - * - * The main loop of the deamon. It listens on its well know port for - * messages, responds to the request via a child process. - * - * Returns: - * Never returns. - * - * Side effects: - * Child processes are created. - *--------------------------------------------------------------------------- - */ - -static void -btimed(void) -{ - int sd; - char msg[BTIME_MSGLEN]; - struct sockaddr_in cli_addr; - int cli_addr_len; - struct sockaddr_in my_addr; - pid_t pid; - ssize_t nbytes; - - if ((sd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { - btimed_error(LOG_ERR, "Could not create socket: %s\n", - strerror(errno)); - exit(1); - } - - memset(&my_addr, 0, sizeof my_addr); - my_addr.sin_family = AF_INET; - my_addr.sin_addr.s_addr = htonl(INADDR_ANY); - my_addr.sin_port = htons(BTIME_PORT); - if (bind(sd, (struct sockaddr *)&my_addr, sizeof my_addr) < 0) { - btimed_error(LOG_ERR, "Could not bind to local address: %s\n", - strerror(errno)); - exit(1); - } - - for (;;) { - memset(&cli_addr, 0, sizeof cli_addr); - cli_addr_len = sizeof cli_addr; - nbytes = recvfrom(sd, &msg, BTIME_MSGLEN, MSG_WAITALL, - (struct sockaddr *)&cli_addr, &cli_addr_len); - - if ((pid = fork()) < 0) { - btimed_error(LOG_ERR, "Could not fork(): %s\n", strerror(errno)); - exit(1); - } - - if (pid == 0) { - memset(msg, 0, BTIME_MSGLEN); - sprintf(msg, "%u\n", get_btime()); - sendto(sd, &msg, BTIME_MSGLEN, MSG_DONTWAIT, - (struct sockaddr *)&cli_addr, cli_addr_len); - - exit(0); - } - } - - close(sd); -} - - - -/* - *--------------------------------------------------------------------------- - * - * get_btime -- - * - * Return machine's boot time. - * - * Returns: - * 0 on failure - * non-zero on success. - * - *--------------------------------------------------------------------------- - */ - -static unsigned int -get_btime(void) -{ - FILE *statf; - char line[1024]; - unsigned int btime = 0; - - if ((statf = fopen("/proc/stat", "r")) == NULL) { - btimed_error(LOG_ERR, "/proc/stat open failure: %s\n", - strerror(errno)); - exit(1); - } - - while (fgets(line, 1024, statf) != NULL) { - if (strstr(line, "btime") != NULL) { - sscanf(line, "%*s%u", &btime); - } - - } - - fclose(statf); - - return btime; -} - - -/* - *--------------------------------------------------------------------------- - * - * daemon_init -- - * - * Set up a basic daemon environment - * - * Returns: - * 0 on success - * non-zero on failure. - * - * Side effects: - * All fds are closed and process is now a session leader. - * - *--------------------------------------------------------------------------- - */ - -static int -daemon_init(void) -{ - pid_t pid; - int fd; - int maxfd = sysconf(_SC_OPEN_MAX); - - if ((pid = fork()) < 0) { - return(-1); - } else if (pid != 0) { - exit(0); /* Exit in parent */ - } - - /* - * Child sets up daemon environment - */ - - setsid(); /* Become session leader */ - chdir("/"); - umask(0); - for (fd = 0; fd < maxfd; fd++) { - close(fd); - } - errno = 0; /* probably set to EBADFD from above loop, reset */ - - openlog("btimed", LOG_PID, LOG_USER); - - return 0; -} - - -/* - *--------------------------------------------------------------------------- - * - * btimed_perror -- - * - * Print error messages to stderr, level is not used, it is there - * to have the same calling args as syslog(3) so we can use either - * based on debug level. - * - * Returns: - * NA - * - * Side effects: - * None - *--------------------------------------------------------------------------- - */ - -static void -btimed_perror(int level, const char *fmt, ...) -{ - va_list ap; - - va_start(ap, fmt); - vfprintf(stderr, fmt, ap); - va_end(ap); -} - - -static void -sigchld_hdlr(int sig) -{ - int status; - - wait(&status); - return; -} - - -static void -usage(const char *progname) -{ - fprintf(stderr, "Usage: %s [OPTION]...\n" - "-h\tPrint this help and exit.\n" - "-d\tDon't daemonize, send output to stderr.\n", - progname); - - return; -} |