execl

[antoniosk]

I have a problem calling a compiled program (for example hello.exe which stands for hello world) from another program (let's say time.exe) with execl function


/* program time.c */
#include <stdio.h>
#include <unistd.h>

main (int argc, char *argv[])

{
int i;

execl(argv[i], (char *) 0);
}


although it compiles,

when I call it with command ./time -hello it produces no output but segmentation fault. I am using bash shell


thank you all guys

[JosAH]

I have a problem calling a compiled program (for example hello.exe which stands for hello world) from another program (let's say time.exe) with execl function


/* program time.c */
#include <stdio.h>
#include <unistd.h>

main (int argc, char *argv[])

{
int i;

execl(argv[i], (char *) 0);
}


although it compiles,

when I call it with command ./time -hello it produces no output but segmentation fault. I am using bash shell


thank you all guys

Better make that:

execl(argv[1], argv[1], null);

and leave out the minus sign on your command line:

./time hello

Note that your local variable 'i' isn't initialized; I replaced it with a literal 1.

kind regards,

Jos