exec族，先上代码
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>int main(int argc, const char *argv[])
{printf("Before execl.\n");if(execl("/bin/ls","ls","-l",NULL) < 0){perror("Fail to execl");exit(EXIT_FAILURE);}printf("After execl.\n");exit(EXIT_SUCCESS);
}
execlp
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>int main(int argc, const char *argv[])
{printf("Before execl.\n");if(execlp("ls","ls","-l",NULL) < 0){perror("Fail to execl");exit(EXIT_FAILURE);}printf("After execl.\n");exit(EXIT_SUCCESS);
}