busybox/libbb/vfork_daemon_rexec.c

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/*
* Rexec program for system have fork() as vfork() with foregound option
* Copyright (C) Vladminr Oleynik and many different people.
*/
#include <unistd.h>
#include "libbb.h"
#if defined(__uClinux__)
void vfork_daemon_rexec(int argc, char **argv, char *foreground_opt)
{
char **vfork_args;
int a = 0;
vfork_args = xcalloc(sizeof(char *), argc + 3);
while(*argv) {
vfork_args[a++] = *argv;
argv++;
}
vfork_args[a] = foreground_opt;
execvp("/proc/self/exe", vfork_args);
vfork_args[0] = "/bin/busybox";
execv(vfork_args[0], vfork_args);
bb_perror_msg_and_die("execv %s", vfork_args[0]);
}
#endif /* uClinux */