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sortix--sortix/utils/kill.cpp

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#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
int usage()
{
printf("usage: kill [-n] pid ...\n");
return 0;
}
int main(int argc, char* argv[])
{
if ( argc < 2 ) { return usage(); }
int first = 1;
int signum = SIGTERM;
if ( argv[1][0] == '-' )
{
signum = atoi(argv[first++]);
if ( argc < 3 ) { return usage(); }
}
int result = 0;
for ( int i = first; i < argc; i++ )
{
pid_t pid = atoi(argv[i]);
if ( kill(pid, signum) )
{
printf("kill: (%u): %s\n", pid, strerror(errno));
result |= 1;
}
}
return result;
}