Linux

After i build fep and do
fep echo i get a Segmentation fault

(gdb) bt full
#0 0x000000341da785f4 in strncpy () from /lib64/libc.so.6
No symbol table info available.
#1 0x000000000040228d in get_pty_master () at fep_main.c:888
pty = 0x1dd51a90 <Address 0x1dd51a90 out of bounds>
#2 0x00000000004039c1 in main (argc=<value optimized out>, argv=0x7fffaab22f10) at fep_main.c:254
cp = 0x7fffaab246bb "echo"
cp = <value optimized out>

can you help me?

You wrote past the end of an array or there was no memory allocated to the destination string - strncpy() copies n characters from source to destination.

What is "fep"?

fep is front end processor

I did a initial debugging using gdb, the problem seems to be with value of pty, master referes master pseudo terminal,

Code:

     pty = ptsname(master);
     strncpy(slave_tty, pty, sizeof(slave_tty));[/COLOR]

I wrote a sample code using ptsname and ran it, It ran fine, I hardcoded pty with the slave pseudo terminal i got from the script, It was fine

my sample script was

Code:

#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
 
main() {
char *pty;
unsigned int master;
 
master = open("/dev/ptmx", O_RDWR);
pty = ptsname(master);
if(pty != NULL) {
    printf ("%s\n", pty);
}
return 0;