Magellan Linux

  • Back to homepage
    • /[magellan-source]/trunk/mkinitrd-magellan/busybox/libbb/login.c

    Annotation of /trunk/mkinitrd-magellan/busybox/libbb/login.c

    Parent Directory Parent Directory | Revision Log Revision Log

    Revision 984 - (hide annotations) (download)
    Sun May 30 11:32:42 2010 UTC (14 years ago) by niro
    File MIME type: text/plain
    File size: 2492 byte(s) 
    -updated to busybox-1.16.1 and enabled blkid/uuid support in default config
    1 niro 532 /* 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 niro 984 #include "libbb.h"
    13     /* After libbb.h, since it needs sys/types.h on some systems */
    14 niro 816 #include <sys/utsname.h>
    15 niro 532
    16     #define LOGIN " login: "
    17    
    18 niro 816 static const char fmtstr_d[] ALIGN1 = "%A, %d %B %Y";
    19     static const char fmtstr_t[] ALIGN1 = "%H:%M:%S";
    20 niro 532
    21 niro 816 void FAST_FUNC print_login_issue(const char *issue_file, const char *tty)
    22 niro 532 {
    23 niro 816 FILE *fp;
    24 niro 532 int c;
    25     char buf[256+1];
    26     const char *outbuf;
    27     time_t t;
    28     struct utsname uts;
    29    
    30     time(&t);
    31     uname(&uts);
    32    
    33     puts("\r"); /* start a new line */
    34    
    35 niro 816 fp = fopen_for_read(issue_file);
    36     if (!fp)
    37 niro 532 return;
    38 niro 816 while ((c = fgetc(fp)) != EOF) {
    39 niro 532 outbuf = buf;
    40     buf[0] = c;
    41     buf[1] = '\0';
    42 niro 816 if (c == '\n') {
    43 niro 532 buf[1] = '\r';
    44     buf[2] = '\0';
    45     }
    46     if (c == '\\' || c == '%') {
    47 niro 816 c = fgetc(fp);
    48 niro 532 switch (c) {
    49     case 's':
    50     outbuf = uts.sysname;
    51     break;
    52     case 'n':
    53 niro 816 case 'h':
    54 niro 532 outbuf = uts.nodename;
    55     break;
    56     case 'r':
    57     outbuf = uts.release;
    58     break;
    59     case 'v':
    60     outbuf = uts.version;
    61     break;
    62     case 'm':
    63     outbuf = uts.machine;
    64     break;
    65 niro 984 /* The field domainname of struct utsname is Linux specific. */
    66     #if defined(__linux__)
    67 niro 532 case 'D':
    68     case 'o':
    69 niro 816 outbuf = uts.domainname;
    70 niro 532 break;
    71 niro 984 #endif
    72 niro 532 case 'd':
    73     strftime(buf, sizeof(buf), fmtstr_d, localtime(&t));
    74     break;
    75     case 't':
    76     strftime(buf, sizeof(buf), fmtstr_t, localtime(&t));
    77     break;
    78     case 'l':
    79     outbuf = tty;
    80     break;
    81     default:
    82     buf[0] = c;
    83     }
    84     }
    85     fputs(outbuf, stdout);
    86     }
    87 niro 816 fclose(fp);
    88 niro 984 fflush_all();
    89 niro 532 }
    90    
    91 niro 816 void FAST_FUNC print_login_prompt(void)
    92 niro 532 {
    93 niro 816 char *hostname = safe_gethostname();
    94 niro 532
    95 niro 816 fputs(hostname, stdout);
    96 niro 532 fputs(LOGIN, stdout);
    97 niro 984 fflush_all();
    98 niro 816 free(hostname);
    99 niro 532 }
    100 niro 816
    101     /* Clear dangerous stuff, set PATH */
    102     static const char forbid[] ALIGN1 =
    103     "ENV" "\0"
    104     "BASH_ENV" "\0"
    105     "HOME" "\0"
    106     "IFS" "\0"
    107     "SHELL" "\0"
    108     "LD_LIBRARY_PATH" "\0"
    109     "LD_PRELOAD" "\0"
    110     "LD_TRACE_LOADED_OBJECTS" "\0"
    111     "LD_BIND_NOW" "\0"
    112     "LD_AOUT_LIBRARY_PATH" "\0"
    113     "LD_AOUT_PRELOAD" "\0"
    114     "LD_NOWARN" "\0"
    115     "LD_KEEPDIR" "\0";
    116    
    117     int FAST_FUNC sanitize_env_if_suid(void)
    118     {
    119     const char *p;
    120    
    121     if (getuid() == geteuid())
    122     return 0;
    123    
    124     p = forbid;
    125     do {
    126     unsetenv(p);
    127     p += strlen(p) + 1;
    128     } while (*p);
    129     putenv((char*)bb_PATH_root_path);
    130    
    131     return 1; /* we indeed were run by different user! */
    132     }