6f1713f216
safe_gethostname - 48 +48 glob3 35 37 +2 timestamp_and_log 314 315 +1 udhcp_send_kernel_packet 234 231 -3 scan_tree 275 271 -4 passwd_main 1074 1070 -4 print_login_prompt 68 58 -10 obscure 392 377 -15 syslogd_main 882 866 -16 print_login_issue 516 478 -38 hostname_main 278 223 -55 parse_and_put_prompt 825 756 -69 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 2/9 up/down: 51/-214) Total: -163 bytes text data bss dec hex filename 798791 728 7484 807003 c505b busybox_old 798631 728 7484 806843 c4fbb busybox_unstripped
131 lines
2.3 KiB
C
131 lines
2.3 KiB
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':
|
|
case 'h':
|
|
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 'l':
|
|
outbuf = tty;
|
|
break;
|
|
default:
|
|
buf[0] = c;
|
|
}
|
|
}
|
|
fputs(outbuf, stdout);
|
|
}
|
|
fclose(fd);
|
|
fflush(stdout);
|
|
}
|
|
|
|
void print_login_prompt(void)
|
|
{
|
|
char *hostname = safe_gethostname();
|
|
|
|
fputs(hostname, stdout);
|
|
fputs(LOGIN, stdout);
|
|
fflush(stdout);
|
|
free(hostname);
|
|
}
|
|
|
|
/* Clear dangerous stuff, set PATH */
|
|
static const char forbid[] ALIGN1 =
|
|
"ENV" "\0"
|
|
"BASH_ENV" "\0"
|
|
"HOME" "\0"
|
|
"IFS" "\0"
|
|
"SHELL" "\0"
|
|
"LD_LIBRARY_PATH" "\0"
|
|
"LD_PRELOAD" "\0"
|
|
"LD_TRACE_LOADED_OBJECTS" "\0"
|
|
"LD_BIND_NOW" "\0"
|
|
"LD_AOUT_LIBRARY_PATH" "\0"
|
|
"LD_AOUT_PRELOAD" "\0"
|
|
"LD_NOWARN" "\0"
|
|
"LD_KEEPDIR" "\0";
|
|
|
|
int sanitize_env_if_suid(void)
|
|
{
|
|
const char *p;
|
|
|
|
if (getuid() == geteuid())
|
|
return 0;
|
|
|
|
p = forbid;
|
|
do {
|
|
unsetenv(p);
|
|
p += strlen(p) + 1;
|
|
} while (*p);
|
|
putenv((char*)bb_PATH_root_path);
|
|
|
|
return 1; /* we indeed were run by different user! */
|
|
}
|