source: MondoRescue/branches/2.2.5/mindi-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 <sys/utsname.h>
#include "libbb.h"

#define LOGIN " login: "

static const char fmtstr_d[] ALIGN1 = "%A, %d %B %Y";
static const char fmtstr_t[] ALIGN1 = "%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);
}