33 lines
958 B
C
33 lines
958 B
C
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// A C program that does not terminate from an interrupt signal.
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// Usually pressing Ctrl-C sends this to the foreground program. This
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// version ignores signals silently for a while, then restores the
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// default signal handlers so the program can be terminated normally.
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//
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// To stop this program from running, open another terminal and try
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// > pkill -9 a.out
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// assuming you named the output program a.out
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#include <stdio.h>
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#include <signal.h>
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#include <unistd.h>
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int main () {
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// Set handling functions for programs
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signal(SIGINT, SIG_IGN); // Ignore these signals silently
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signal(SIGTERM, SIG_IGN);
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// Infinite loop
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int count = 0;
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while(1) {
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sleep(1);
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printf("Ma-na na-na!\n");
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fflush(stdout);
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count++;
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if(count == 5){
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printf("Restoring default signal disposition\n");
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signal(SIGINT, SIG_DFL); // restore default signal disposition
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signal(SIGTERM, SIG_DFL);
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}
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}
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return 0;
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}
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