busybox/libbb/login.c

/* vi: set sw=4 ts=4: */
/*
 * issue.c: issue printing code
 *
 * Copyright (C) 2003 Bastian Blank <waldi@tuxbox.org>
 *
 * Optimize and correcting OCRNL by Vladimir Oleynik <dzo@simtreas.ru>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#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+1];
	const char *outbuf;
	time_t t;
	struct utsname uts;

	time(&t);
	uname(&uts);

	puts("\r");	/* start a new line */

	fd = fopen(issue_file, "r");
	if (!fd)
		return;
	while ((c = fgetc(fd)) != EOF) {
		outbuf = buf;
		buf[0] = c;
		buf[1] = '\0';
		if(c == '\n') {
			buf[1] = '\r';
			buf[2] = '\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':
				c = getdomainname(buf, sizeof(buf) - 1);
				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':
				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];

	if (gethostname(buf, MAXHOSTNAMELEN) == 0)
		fputs(buf, stdout);

	fputs(LOGIN, stdout);
	fflush(stdout);
}
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	}