35 lines
919 B
C
35 lines
919 B
C
#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <sys/wait.h>
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int main(int argc, char **argv){
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if (argv[1] == NULL) {
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printf("Error : %s must have one argument\n", argv[0]);
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exit(EXIT_FAILURE);
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}
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printf("Execute programme number %s\n",argv[1]);
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int r = atoi(argv[1]) - 1;
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if (r > 0){
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int pid = fork();
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if (pid == -1) {
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printf("Error : %s", strerror(errno));
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exit(EXIT_FAILURE);
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}
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if (pid == 0) {
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// we are in our children
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char args[12] = "";
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sprintf(args,"%i", r);
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if ((execl(argv[0], argv[0], args, NULL)) < 0 ) {
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printf("Error : %s\n", strerror(errno));
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exit(EXIT_FAILURE);
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}
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}
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}
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else {
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printf("This is the end!\n");
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}
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exit(EXIT_SUCCESS);
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}
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