00001 /*
00002     Signal-handler example
00003     AUP2, Sec. 9.01.7
00004 
00005     Copyright 2003 by Marc J. Rochkind. All rights reserved.
00006     May be copied only for purposes and under conditions described
00007     on the Web page www.basepath.com/aup/copyright.htm.
00008 
00009     The Example Files are provided "as is," without any warranty;
00010     without even the implied warranty of merchantability or fitness
00011     for a particular purpose. The author and his publisher are not
00012     responsible for any damages, direct or incidental, resulting
00013     from the use or non-use of these Example Files.
00014 
00015     The Example Files may contain defects, and some contain deliberate
00016     coding mistakes that were included for educational reasons.
00017     You are responsible for determining if and how the Example Files
00018     are to be used.
00019 
00020 */
00021 #include "defs.h"
00022 /*[pgm]*/
00023 
00024 static volatile sig_atomic_t gotsig = -1;
00025 
00026 static void handler(int signum)
00027 {
00028     gotsig = signum;
00029 }
00030 
00031 int main(void)
00032 {
00033     struct sigaction act;
00034     time_t start, stop;
00035 
00036     memset(&act, 0, sizeof(act));
00037     act.sa_handler = handler;
00038     act.sa_flags = SA_RESTART;
00039     ec_neg1( sigaction(SIGINT, &act, NULL) )
00040     printf("Type Ctrl-c in the next 10 secs.\n");
00041     ec_neg1( start = time(NULL) )
00042     sleep(20);
00043     ec_neg1( stop = time(NULL) )
00044     printf("Slept for %ld secs\n", (long)(stop - start));
00045     if (gotsig > 0)
00046         printf("Got signal number %ld\n", (long)gotsig);
00047     else
00048         printf("Did not get signal\n");
00049     exit(EXIT_SUCCESS);
00050 
00051 EC_CLEANUP_BGN
00052     exit(EXIT_FAILURE);
00053 EC_CLEANUP_END
00054 }
00055 /*[]*/
c9/sighandler.c
