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/* dctrl-tools - Debian control file inspection tools
Copyright © 2004, 2008 Antti-Juhani Kaijanaho
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 of the License, 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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include "misc.h"
#include "msg.h"
int to_stdout (const char * fname)
{
FILE * f;
FILE * t = stdout;
bool pipe = false;
int c;
int rv = 1;
if (isatty(STDOUT_FILENO)) {
char * cmd = getenv("PAGER");
if (cmd == 0) cmd = "/usr/bin/pager";
if (do_msg(L_INFORMATIONAL)) {
fprintf(stderr, _("%s: using `%s' as pager\n"),
get_progname(), cmd);
}
// popen does not set errno if memory allocation fails
errno = ENOMEM;
FILE * p = popen(cmd, "w");
if (p != 0) {
t = p;
pipe = true;
} else if (do_msg(L_IMPORTANT)) {
fprintf(stderr, _("%s: popen failed for %s: %s\n"),
get_progname(), cmd, strerror(errno));
}
}
f = fopen (fname, "r");
if (f == 0) {
message(L_FATAL, COPYING, "%s", strerror (errno));
return 0;
}
while ( ( c = getc (f)) != EOF) putc(c, t);
if (ferror (f)) {
message(L_FATAL, COPYING, "%s", strerror(errno));
rv = 0;
}
fclose (f);
if (pipe) pclose(t);
return rv;
}
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