Tibor Nagy
4381bb2a22
When the execution reaches the end of the main functions, they implicitly return a successful status.
25 lines
575 B
C
25 lines
575 B
C
/*
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* The process joins process group 0.
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <unistd.h>
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int main(void) {
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if( setpgid( getpid(), 0 ) == -1 ) {
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perror( "setpgid" );
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}
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printf( "%d belongs to process group %d\n",
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getpid(), getpgrp() );
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if( setregid(-1, -1) == -1 ) {
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perror( "setregid" );
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}
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printf("%d has egid %d and gid %d\n", getpid(), getegid(), getgid());
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if( setreuid(-1, -1) == -1 ) {
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perror( "setreuid" );
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}
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printf("%d has euid %d and uid %d\n", getpid(), geteuid(), getuid());
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}
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