busybox/libbb/login.c
Rob Landley 081d6d4380 getdomainname() isn't guaranteed to null terminate the string if it was
truncated for length.  SVN 14135 made sure that the truncated version would
always be null terminated.  SVN 14144 broke this for no readily apparent
reason, and I have no idea what it was even trying to accomplish.  Reverted.
2006-02-20 16:31:44 +00:00

130 lines
2.6 KiB
C

/*
* issue.c: issue printing code
*
* Copyright (C) 2003 Bastian Blank <waldi@tuxbox.org>
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Optimize and correcting OCRNL by Vladimir Oleynik <dzo@simtreas.ru>
*/
#include <sys/param.h> /* MAXHOSTNAMELEN */
#include <stdio.h>
#include <unistd.h>
#include "libbb.h"
#include <sys/utsname.h>
#include <time.h>
#define LOGIN " login: "
static const char fmtstr_d[] = "%A, %d %B %Y";
static const char fmtstr_t[] = "%H:%M:%S";
void print_login_issue(const char *issue_file, const char *tty)
{
FILE *fd;
int c;
char buf[256];
const char *outbuf;
time_t t;
struct utsname uts;
time(&t);
uname(&uts);
puts("\r"); /* start a new line */
if ((fd = fopen(issue_file, "r"))) {
while ((c = fgetc(fd)) != EOF) {
outbuf = buf;
buf[0] = c;
if(c == '\n') {
buf[1] = '\r';
buf[2] = 0;
} else {
buf[1] = 0;
}
if (c == '\\' || c == '%') {
c = fgetc(fd);
switch (c) {
case 's':
outbuf = uts.sysname;
break;
case 'n':
outbuf = uts.nodename;
break;
case 'r':
outbuf = uts.release;
break;
case 'v':
outbuf = uts.version;
break;
case 'm':
outbuf = uts.machine;
break;
case 'D':
case 'o':
getdomainname(buf, sizeof(buf));
buf[sizeof(buf) - 1] = '\0';
break;
case 'd':
strftime(buf, sizeof(buf), fmtstr_d, localtime(&t));
break;
case 't':
strftime(buf, sizeof(buf), fmtstr_t, localtime(&t));
break;
case 'h':
gethostname(buf, sizeof(buf) - 1);
buf[sizeof(buf) - 1] = '\0';
break;
case 'l':
outbuf = tty;
break;
default:
buf[0] = c;
}
}
fputs(outbuf, stdout);
}
fclose(fd);
fflush(stdout);
}
}
void print_login_prompt(void)
{
char buf[MAXHOSTNAMELEN+1];
gethostname(buf, MAXHOSTNAMELEN);
fputs(buf, stdout);
fputs(LOGIN, stdout);
fflush(stdout);
}