33 lines
632 B
C
33 lines
632 B
C
#include <stdio.h>
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#include <signal.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <pwd.h>
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#include <string.h>
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static void my_alarm(int signo) {
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struct passwd *rootptr;
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printf("in signal handler signo = %d\n", signo);
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if ((rootptr = getpwnam("root")) == NULL) {
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printf("getpwnam(root) error");
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}
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alarm(1);
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}
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int main(void) {
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struct passwd *ptr;
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signal(SIGALRM, my_alarm);
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alarm(1);
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for(;;) {
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if((ptr = getpwnam("eric")) == NULL)
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printf("getpwnam(eric) error");
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if(strcmp(ptr->pw_name, "eric") != 0) {
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printf("return value corrupted, pw_name = %s\n", ptr->pw_name);
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}
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}
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}
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