libbb/login.c

   1 /*
   2  * issue.c: issue printing code
   3  *
   4  * Copyright (C) 2003 Bastian Blank <waldi@tuxbox.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  *
  20  * Optimize and correcting OCRNL by Vladimir Oleynik <dzo@simtreas.ru>
  21  */
  22
  23 #include <sys/param.h>  /* MAXHOSTNAMELEN */
  24 #include <stdio.h>
  25 #include <unistd.h>
  26 #include "libbb.h"
  27
  28 #include <sys/utsname.h>
  29 #include <time.h>
  30
  31 #define LOGIN " login: "
  32
  33 static const char fmtstr_d[] = "%A, %d %B %Y";
  34 static const char fmtstr_t[] = "%H:%M:%S";
  35
  36 void print_login_issue(const char *issue_file, const char *tty)
  37 {
  38         FILE *fd;
  39         int c;
  40         char buf[256+1];
  41         const char *outbuf;
  42         time_t t;
  43         struct utsname uts;
  44
  45         time(&t);
  46         uname(&uts);
  47
  48         puts("\r");     /* start a new line */
  49
  50         if ((fd = fopen(issue_file, "r"))) {
  51                 while ((c = fgetc(fd)) != EOF) {
  52                         outbuf = buf;
  53                         buf[0] = c;
  54                         if(c == '\n') {
  55                                 buf[1] = '\r';
  56                                 buf[2] = 0;
  57                         } else {
  58                                 buf[1] = 0;
  59                         }
  60                         if (c == '\\' || c == '%') {
  61                                 c = fgetc(fd);
  62                                 switch (c) {
  63                                         case 's':
  64                                                 outbuf = uts.sysname;
  65                                                 break;
  66
  67                                         case 'n':
  68                                                 outbuf = uts.nodename;
  69                                                 break;
  70
  71                                         case 'r':
  72                                                 outbuf = uts.release;
  73                                                 break;
  74
  75                                         case 'v':
  76                                                 outbuf = uts.version;
  77                                                 break;
  78
  79                                         case 'm':
  80                                                 outbuf = uts.machine;
  81                                                 break;
  82
  83                                         case 'D':
  84                                         case 'o':
  85                                                 c = getdomainname(buf, sizeof(buf) - 1);
  86                                                 buf[c >= 0 ? c : 0] = '\0';
  87                                                 break;
  88
  89                                         case 'd':
  90                                                 strftime(buf, sizeof(buf), fmtstr_d, localtime(&t));
  91                                                 break;
  92
  93                                         case 't':
  94                                                 strftime(buf, sizeof(buf), fmtstr_t, localtime(&t));
  95                                                 break;
  96
  97                                         case 'h':
  98                                                 gethostname(buf, sizeof(buf) - 1);
  99                                                 buf[sizeof(buf) - 1] = '\0';
 100                                                 break;
 101
 102                                         case 'l':
 103                                                 outbuf = tty;
 104                                                 break;
 105
 106                                         default:
 107                                                 buf[0] = c;
 108                                 }
 109                         }
 110                         fputs(outbuf, stdout);
 111                 }
 112
 113                 fclose(fd);
 114
 115                 fflush(stdout);
 116         }
 117 }
 118
 119 void print_login_prompt(void)
 120 {
 121         char buf[MAXHOSTNAMELEN+1];
 122
 123         if(gethostname(buf, MAXHOSTNAMELEN) == 0)
 124                 fputs(buf, stdout);
 125
 126         fputs(LOGIN, stdout);
 127         fflush(stdout);
 128 }
 129