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/* tee - read from standard input and write to standard output and files.
Copyright (C) 85, 90, 91, 92, 93, 94, 1995 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Mike Parker, Richard M. Stallman, and David MacKenzie */
#include <config.h>
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
#include <getopt.h>
#include "system.h"
#include "version.h"
#include "error.h"
char *xmalloc ();
int full_write ();
static int tee __P ((int nfiles, const char **files));
/* If nonzero, append to output files rather than truncating them. */
static int append;
/* If nonzero, ignore interrupts. */
static int ignore_interrupts;
/* The name that this program was run with. */
char *program_name;
/* If nonzero, display usage information and exit. */
static int show_help;
/* If nonzero, print the version on standard output and exit. */
static int show_version;
static struct option const long_options[] =
{
{"append", no_argument, NULL, 'a'},
{"help", no_argument, &show_help, 1},
{"ignore-interrupts", no_argument, NULL, 'i'},
{"version", no_argument, &show_version, 1},
{NULL, 0, NULL, 0}
};
static void
usage (int status)
{
if (status != 0)
fprintf (stderr, _("Try `%s --help' for more information.\n"),
program_name);
else
{
printf (_("Usage: %s [OPTION]... [FILE]...\n"), program_name);
printf (_("\
Copy standard input to each FILE, and also to standard output.\n\
\n\
-a, --append append to the given FILEs, do not overwrite\n\
-i, --ignore-interrupts ignore interrupt signals\n\
--help display this help and exit\n\
--version output version information and exit\n\
"));
}
exit (status);
}
void
main (int argc, char **argv)
{
int errs;
int optc;
program_name = argv[0];
append = 0;
ignore_interrupts = 0;
while ((optc = getopt_long (argc, argv, "ai", long_options, (int *) 0))
!= EOF)
{
switch (optc)
{
case 0:
break;
case 'a':
append = 1;
break;
case 'i':
ignore_interrupts = 1;
break;
default:
usage (1);
}
}
if (show_version)
{
printf ("tee - %s\n", version_string);
exit (0);
}
if (show_help)
usage (0);
if (ignore_interrupts)
{
#ifdef _POSIX_SOURCE
struct sigaction sigact;
sigact.sa_handler = SIG_IGN;
sigemptyset (&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction (SIGINT, &sigact, NULL);
#else /* !_POSIX_SOURCE */
signal (SIGINT, SIG_IGN);
#endif /* _POSIX_SOURCE */
}
errs = tee (argc - optind, (const char **) &argv[optind]);
if (close (0) != 0)
error (1, errno, _("standard input"));
if (close (1) != 0)
error (1, errno, _("standard output"));
exit (errs);
}
/* Copy the standard input into each of the NFILES files in FILES
and into the standard output.
Return 0 if successful, 1 if any errors occur. */
static int
tee (int nfiles, const char **files)
{
int *descriptors;
char buffer[BUFSIZ];
register int bytes_read, i, ret = 0, mode;
descriptors = (int *) xmalloc ((nfiles + 1) * sizeof (int));
mode = O_WRONLY | O_CREAT;
if (append)
mode |= O_APPEND;
else
mode |= O_TRUNC;
/* Move all the names `up' one in the argv array to make room for
the entry for standard output. This writes into argv[argc]. */
for (i = nfiles; i >= 1; i--)
files[i] = files[i - 1];
/* In the array of NFILES + 1 descriptors, make
the first one correspond to standard output. */
descriptors[0] = 1;
files[0] = _("standard output");
for (i = 1; i <= nfiles; i++)
{
descriptors[i] = open (files[i], mode, 0666);
if (descriptors[i] == -1)
{
error (0, errno, "%s", files[i]);
ret = 1;
}
}
while (1)
{
bytes_read = read (0, buffer, sizeof buffer);
#ifdef EINTR
if (bytes_read < 0 && errno == EINTR)
continue;
#endif
if (bytes_read <= 0)
break;
/* Write to all NFILES + 1 descriptors.
Standard output is the first one. */
for (i = 0; i <= nfiles; i++)
{
if (descriptors[i] != -1
&& full_write (descriptors[i], buffer, bytes_read) < 0)
{
error (0, errno, "%s", files[i]);
/* Don't close stdout. That's done in main. */
if (descriptors[i] != 1)
close (descriptors[i]);
descriptors[i] = -1;
ret = 1;
}
}
}
if (bytes_read == -1)
{
error (0, errno, _("read error"));
ret = 1;
}
/* Close the files, but not standard output. */
for (i = 1; i <= nfiles; i++)
if (descriptors[i] != -1 && close (descriptors[i]) != 0)
{
error (0, errno, "%s", files[i]);
ret = 1;
}
free (descriptors);
return ret;
}
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