libbb/login.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * issue.c: issue printing code
   4  *
   5  * Copyright (C) 2003 Bastian Blank <waldi@tuxbox.org>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  *
  21  * Optimize and correcting OCRNL by Vladimir Oleynik <dzo@simtreas.ru>
  22  */
  23
  24 #include <sys/param.h>  /* MAXHOSTNAMELEN */
  25 #include <stdio.h>
  26 #include <unistd.h>
  27 #include "libbb.h"
  28
  29 #include <sys/utsname.h>
  30 #include <time.h>
  31
  32 #define LOGIN " login: "
  33
  34 static const char fmtstr_d[] = "%A, %d %B %Y";
  35 static const char fmtstr_t[] = "%H:%M:%S";
  36
  37 void print_login_issue(const char *issue_file, const char *tty)
  38 {
  39         FILE *fd;
  40         int c;
  41         char buf[256+1];
  42         const char *outbuf;
  43         time_t t;
  44         struct utsname uts;
  45
  46         time(&t);
  47         uname(&uts);
  48
  49         puts("\r");     /* start a new line */
  50
  51         if ((fd = fopen(issue_file, "r"))) {
  52                 while ((c = fgetc(fd)) != EOF) {
  53                         outbuf = buf;
  54                         buf[0] = c;
  55                         if(c == '\n') {
  56                                 buf[1] = '\r';
  57                                 buf[2] = 0;
  58                         } else {
  59                                 buf[1] = 0;
  60                         }
  61                         if (c == '\\' || c == '%') {
  62                                 c = fgetc(fd);
  63                                 switch (c) {
  64                                         case 's':
  65                                                 outbuf = uts.sysname;
  66                                                 break;
  67
  68                                         case 'n':
  69                                                 outbuf = uts.nodename;
  70                                                 break;
  71
  72                                         case 'r':
  73                                                 outbuf = uts.release;
  74                                                 break;
  75
  76                                         case 'v':
  77                                                 outbuf = uts.version;
  78                                                 break;
  79
  80                                         case 'm':
  81                                                 outbuf = uts.machine;
  82                                                 break;
  83
  84                                         case 'D':
  85                                         case 'o':
  86                                                 c = getdomainname(buf, sizeof(buf) - 1);
  87                                                 buf[c >= 0 ? c : 0] = '\0';
  88                                                 break;
  89
  90                                         case 'd':
  91                                                 strftime(buf, sizeof(buf), fmtstr_d, localtime(&t));
  92                                                 break;
  93
  94                                         case 't':
  95                                                 strftime(buf, sizeof(buf), fmtstr_t, localtime(&t));
  96                                                 break;
  97
  98                                         case 'h':
  99                                                 gethostname(buf, sizeof(buf) - 1);
 100                                                 buf[sizeof(buf) - 1] = '\0';
 101                                                 break;
 102
 103                                         case 'l':
 104                                                 outbuf = tty;
 105                                                 break;
 106
 107                                         default:
 108                                                 buf[0] = c;
 109                                 }
 110                         }
 111                         fputs(outbuf, stdout);
 112                 }
 113
 114                 fclose(fd);
 115
 116                 fflush(stdout);
 117         }
 118 }
 119
 120 void print_login_prompt(void)
 121 {
 122         char buf[MAXHOSTNAMELEN+1];
 123
 124         if(gethostname(buf, MAXHOSTNAMELEN) == 0)
 125                 fputs(buf, stdout);
 126
 127         fputs(LOGIN, stdout);
 128         fflush(stdout);
 129 }
 130