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Example of using spawnlp in a QNX program to call out to cp in order to copy a file.
#include <stdlib.h>
#include <stdio.h>
#include <process.h>
int main(int argc, char *argv[]) {
if (argc >= 3) {
// call out to cp and use the arguments passed to this program.
// We are using P_WAIT so that spawnlp waits for CP to return
// The second argument specifies the executable to run
// The third-fifth argument will become argv[0] - argv[2] of the executable
// The sixth argument indicates that the list of arguments is done
// For more information see
int retValue = spawnlp(P_WAIT, "cp", "cp", argv[1], argv[2], NULL);
printf("Return value of calling `cp %s %s` is %d\n", argv[1], argv[2], retValue);
} else {
printf("Please specify two files to copy\n");

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chitchcock commented Jul 9, 2013

Somehow I created this as an anonymous gist.

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