>>>>> Junaid Iqbal writes:
> hi all.
> I m unable to undersatnd how system calls implemented in glibc (ver
> 2.1.3).
> for example __libc_system function (defined in system.c) have these
> lines
That's the fall back in sysdeps/generic/system.c, the function used on
Linux is in sysdeps/posix/system.c. Read the documentation about the
sysdeps directory and have also a look at syscalls.list.
> #include <errno.h>
> #include <stdlib.h>
> /* Execute LINE as a shell command. */
> int
> __libc_system (line)
> const char *line;
> {
> if (line == NULL)
> return 0; /* This indicates no command processor. */
> __sys_errno (ENOSYS);
> return -1;
> }
> weak_alias (__libc_system, system)
> stub_warning (system)
> #include <stub-tag.h>
> can some one give me hand in understanding this?
> thanks in advance.
--
Andreas Jaeger
SuSE Labs [EMAIL PROTECTED]
private [EMAIL PROTECTED]
