Hi

Below gives me a seg fault

#include <curses.h>
#include <stdio.h>

int main()
{
char c;
while(1)
{
c = (char)getch( );
printf("you entered %c \n",c);
}
}

[abmisra1@AbhishekM isra1 sampleC]$ gdb terminal.o core
GNU gdb Red Hat Linux (6.3.0.0-1.132. EL4rh)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-redhat- linux-gnu" ...(no debugging symbols found)
Using host libthread_db library "/lib/tls/libthread _db.so.1" .

Core was generated by `./terminal. o'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/lib/libncurses .so.5...done.
Loaded symbols for /usr/lib/libncurses .so.5
Reading symbols from /lib/tls/libc. so.6...done.
Loaded symbols for /lib/tls/libc. so.6
Reading symbols from /lib/ld-linux. so.2...done.
Loaded symbols for /lib/ld-linux. so.2
#0 0x03f66557 in wgetch (win=0x0) at ../../ncurses/ base/lib_ getch.c:467
467 ../../ncurses/ base/lib_ getch.c: No such file or directory.
in ../../ncurses/ base/lib_ getch.c
(gdb) run
Starting program: /home/abmisra1/ sampleC/terminal .o

Program received signal SIGSEGV, Segmentation fault.
0x03f66557 in wgetch (win=0x0) at ../../ncurses/ base/lib_ getch.c:467
467 ../../ncurses/ base/lib_ getch.c: No such file or directory.
in ../../ncurses/ base/lib_ getch.c
(gdb) quit
The program is running. Exit anyway? (y or n) y
[abmisra1@AbhishekM isra1 sampleC]$


I'm using a custom built rhel 4 derived distro

Seems something wrong with my curses library

there is no ncurses/base/ lib_getch. c on my system, I do not think that in any case should a c file be required if we have executables and libraries in place.

Could some one through some light.

That message probably comes from the library containing ncurses being build with gdb symbols and getting debugged on a different machine. In other words, it was build by your distro maintainer, but the source file doesn't reside in the same place on your machine (if at all.) I'm pretty sure that message has little to do with the actual error, other than that the backtrace leads through the getch call. My guess is you need to check for an error state before using that function to make sure the input source is open and is capable of providing data.
ta0kira

ok i found the problem ncurses needs to be initialized

#include <ncurses.h>
#include <stdio.h>

int main()
{
char c;
initscr();
cbreak();
keypad(stdscr, TRUE);
noecho();

//nodelay(stdscr, TRUE); if no onput is wating then value of ERR is returned

//while(1)
{
c = getch();
printw("you entered %c \n",c);
}
getch();
endwin();
return 0;
}