xv6-65oo2/user/kill.c

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#include "kernel/types.h"
#include "kernel/stat.h"
#include "user/user.h"
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int
main(int argc, char **argv)
{
int i;
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if(argc < 2){
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fprintf(2, "usage: kill pid...\n");
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exit(1);
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}
for(i=1; i<argc; i++)
kill(atoi(argv[i]));
exit(0);
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}