hush/libbb/login.c

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/* vi: set sw=4 ts=4: */
/*
* issue.c: issue printing code
*
* Copyright (C) 2003 Bastian Blank <waldi@tuxbox.org>
*
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* Optimize and correcting OCRNL by Vladimir Oleynik <dzo@simtreas.ru>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
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#include <sys/param.h> /* MAXHOSTNAMELEN */
#include <stdio.h>
#include <unistd.h>
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#include "libbb.h"
#include <sys/utsname.h>
#include <time.h>
#define LOGIN " login: "
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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;
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char buf[256+1];
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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) {
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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':
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outbuf = uts.sysname;
break;
case 'n':
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outbuf = uts.nodename;
break;
case 'r':
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outbuf = uts.release;
break;
case 'v':
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outbuf = uts.version;
break;
case 'm':
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outbuf = uts.machine;
break;
case 'D':
case 'o':
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c = getdomainname(buf, sizeof(buf) - 1);
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buf[c >= 0 ? c : 0] = '\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':
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gethostname(buf, sizeof(buf) - 1);
buf[sizeof(buf) - 1] = '\0';
break;
case 'l':
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outbuf = tty;
break;
default:
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buf[0] = c;
}
}
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fputs(outbuf, stdout);
}
fclose(fd);
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fflush(stdout);
}
}
void print_login_prompt(void)
{
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char buf[MAXHOSTNAMELEN+1];
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if(gethostname(buf, MAXHOSTNAMELEN) == 0)
fputs(buf, stdout);
fputs(LOGIN, stdout);
fflush(stdout);
}