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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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33 lines
650 B
C
33 lines
650 B
C
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#include <stdio.h>
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#include <unistd.h>
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#include <assert.h>
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#include <signal.h>
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int fds[2];
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void the_sighandler ( int signo )
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{
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int nw;
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// assert(signo == SIGUSR1);
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// printf("sighandler running; should unblock now\n");
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nw = write(fds[1], "zzz", 1);
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// assert(nw == 1);
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}
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int main ( void )
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{
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char buf[10];
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int res, nr;
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void* oldsh = signal(SIGUSR1, the_sighandler);
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assert(oldsh != SIG_ERR);
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printf("pid = %d\n", getpid());
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res = pipe(fds);
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assert (res == 0);
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printf("doing read(); this should block\n");
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nr = read(fds[0], buf, 1);
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/* blocks */
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printf("read returned %d\n", nr);
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return 0;
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}
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