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  * Optimize and correcting OCRNL by Vladimir Oleynik <dzo@simtreas.ru>
   8  *
   9  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  10  */
  11
  12 #include <sys/param.h>  /* MAXHOSTNAMELEN */
  13 #include <stdio.h>
  14 #include <unistd.h>
  15 #include "libbb.h"
  16
  17 #include <sys/utsname.h>
  18 #include <time.h>
  19
  20 #define LOGIN " login: "
  21
  22 static const char fmtstr_d[] = "%A, %d %B %Y";
  23 static const char fmtstr_t[] = "%H:%M:%S";
  24
  25 void print_login_issue(const char *issue_file, const char *tty)
  26 {
  27         FILE *fd;
  28         int c;
  29         char buf[256+1];
  30         const char *outbuf;
  31         time_t t;
  32         struct utsname uts;
  33
  34         time(&t);
  35         uname(&uts);
  36
  37         puts("\r");     /* start a new line */
  38
  39         fd = fopen(issue_file, "r");
  40         if (!fd)
  41                 return;
  42         while ((c = fgetc(fd)) != EOF) {
  43                 outbuf = buf;
  44                 buf[0] = c;
  45                 buf[1] = '\0';
  46                 if(c == '\n') {
  47                         buf[1] = '\r';
  48                         buf[2] = '\0';
  49                 }
  50                 if (c == '\\' || c == '%') {
  51                         c = fgetc(fd);
  52                         switch (c) {
  53                         case 's':
  54                                 outbuf = uts.sysname;
  55                                 break;
  56                         case 'n':
  57                                 outbuf = uts.nodename;
  58                                 break;
  59                         case 'r':
  60                                 outbuf = uts.release;
  61                                 break;
  62                         case 'v':
  63                                 outbuf = uts.version;
  64                                 break;
  65                         case 'm':
  66                                 outbuf = uts.machine;
  67                                 break;
  68                         case 'D':
  69                         case 'o':
  70                                 c = getdomainname(buf, sizeof(buf) - 1);
  71                                 buf[c >= 0 ? c : 0] = '\0';
  72                                 break;
  73                         case 'd':
  74                                 strftime(buf, sizeof(buf), fmtstr_d, localtime(&t));
  75                                 break;
  76                         case 't':
  77                                 strftime(buf, sizeof(buf), fmtstr_t, localtime(&t));
  78                                 break;
  79                         case 'h':
  80                                 gethostname(buf, sizeof(buf) - 1);
  81                                 buf[sizeof(buf) - 1] = '\0';
  82                                 break;
  83                         case 'l':
  84                                 outbuf = tty;
  85                                 break;
  86                         default:
  87                                 buf[0] = c;
  88                         }
  89                 }
  90                 fputs(outbuf, stdout);
  91         }
  92         fclose(fd);
  93         fflush(stdout);
  94 }
  95
  96 void print_login_prompt(void)
  97 {
  98         char buf[MAXHOSTNAMELEN+1];
  99
 100         if (gethostname(buf, MAXHOSTNAMELEN) == 0)
 101                 fputs(buf, stdout);
 102
 103         fputs(LOGIN, stdout);
 104         fflush(stdout);
 105 }