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Programming
Redirecting Terminal to Local Application!
Post 302479770 by JonhyM on Monday 13th of December 2010 01:01:45 AM
12-13-2010
Code:
#include <stdio.h>
/* These are useful to keep the source readable */
#ifndef STDIN_FILENO
# define STDIN_FILENO 0
#endif
#ifndef STDOUT_FILENO
# define STDOUT_FILENO 1
#endif
#ifndef STDERR_FILENO
# define STDERR_FILENO 2
#endif
#ifndef SHUT_RDWR
# define SHUT_RDWR 2
#endif
char *opt_exec = NULL; /* program to exec after connecting */
static void ncexec(FILE *MyOutput)
{
int saved_stderr;
char *p;
// assert(ncsock && (ncsock->fd >= 0));
/* save the stderr fd because we may need it later */
saved_stderr = dup(STDERR_FILENO);
/* duplicate the socket for the child program */
dup2(MyOutput, STDIN_FILENO); /* the precise order of fiddlage */
close(MyOutput); /* is apparently crucial; this is */
dup2(STDIN_FILENO, STDOUT_FILENO); /* swiped directly out of "inetd". */
dup2(STDIN_FILENO, STDERR_FILENO); /* also duplicate the stderr channel */
/* change the label for the executed program */
if ((p = strrchr(opt_exec, '/')))
p++; /* shorter argv[0] */
else
p = opt_exec;
/* replace this process with the new one */
#ifndef USE_OLD_COMPAT
execl("/bin/sh", p, "-c", opt_exec, NULL);
#else
execl(opt_exec, p, NULL);
#endif
dup2(saved_stderr, STDERR_FILENO);
// ncprint(NCPRINT_ERROR | NCPRINT_EXIT, _("Couldn't execute %s: %s"),
// opt_exec, strerror(errno));
} /* end of ncexec() */
int main()
{
FILE *fOutput;
fOutput = fopen("/mnt/hgfs/VMShares/output.txt", "w+");
if (fOutput == NULL) printf("fOutput Error\n");
if (fork() == 0)
{
printf("Fork() Success !\n");
ncexec(fOutput);
}
sleep(2);
//fwrite("ls", 4, 2, fOutput);
return 0;
}but it didnt work, no output on the file i created
sorry for the stupid question, im new to the world of linux and c..
thanks.
Last edited by JonhyM; 12-13-2010 at 02:24 AM..
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LEARN ABOUT SUSE
ul
UL(1) BSD General Commands Manual UL(1) NAME
ul -- do underlining SYNOPSIS
ul [-i] [-t terminal] [name ...] DESCRIPTION
Ul reads the named files (or standard input if none are given) and translates occurrences of underscores to the sequence which indicates underlining for the terminal in use, as specified by the environment variable TERM. The terminfo database is read to determine the appropri- ate sequences for underlining. If the terminal is incapable of underlining, but is capable of a standout mode then that is used instead. If the terminal can overstrike, or handles underlining automatically, ul degenerates to cat(1). If the terminal cannot underline, underlining is ignored. The following options are available: -i Underlining is indicated by a separate line containing appropriate dashes `-'; this is useful when you want to look at the underlin- ing which is present in an nroff output stream on a crt-terminal. -t terminal Overrides the terminal type specified in the environment with terminal. ENVIRONMENT
The following environment variable is used: TERM The TERM variable is used to relate a tty device with its device capability description (see terminfo(5)). TERM is set at login time, either by the default terminal type specified in /etc/ttys or as set during the login process by the user in their login file (see setenv(1)). SEE ALSO
man(1), nroff(1), colcrt(1) BUGS
Nroff usually outputs a series of backspaces and underlines intermixed with the text to indicate underlining. No attempt is made to optimize the backward motion. HISTORY
The ul command appeared in 3.0BSD. AVAILABILITY
The ul command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/. 4th Berkeley Distribution June 6, 1993 4th Berkeley Distribution