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#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
void print_array(int argc, char *argv[]) {
// Helper function to print given array with given length.
int i = 0;
int j = 0;
for (i = 0; i < argc; i ++) {
j = 0;
while(argv[i][j] != '\0')
printf("%c", argv[i][j++]);
printf(" ");
}
printf("\n");
}
int main(int argc, char *argv[]) {
int count;
// Last item acts as null pointer.
char **copy = calloc(sizeof(char *), argc);
// Slice first given command line argument.
for (count = 0; count < argc - 1; count++)
copy[count] = strdup(argv[count + 1]);
// Adding systemd indicator to preserve wrapped process during changing
// root filesystem. We mark wrapper and child process.
argv[0][0] = '@';
copy[0][0] = '@';
if (-1 == execvp(argv[1], copy)) {
perror("Executing child process failed.");
return -1;
}
}
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