busybox/libbb/login.c
Denis Vlasenko 5415c856ea libbb: [x]fopen_for_{read,write} introduced and used.
(by Valdimir)

function                                             old     new   delta
config_open2                                           -      41     +41
config_read                                          507     542     +35
find_pair                                            169     187     +18
fopen_for_write                                        -      14     +14
fopen_for_read                                         -      14     +14
find_main                                            406     418     +12
xfopen_for_write                                       -      10     +10
xfopen_for_read                                        -      10     +10
popstring                                            134     140      +6
parse_inittab                                        396     401      +5
next_token                                           923     928      +5
pack_gzip                                           1659    1661      +2
bb__parsespent                                       117     119      +2
fallbackSort                                        1719    1717      -2
evalvar                                             1376    1374      -2
qrealloc                                              36      33      -3
...
...
...
...
singlemount                                         4579    4569     -10
process_stdin                                        443     433     -10
patch_main                                          1111    1101     -10
ifupdown_main                                       2175    2165     -10
file_action_grep                                      90      80     -10
uuidcache_init                                       649     637     -12
hush_main                                            797     785     -12
read_config                                          230     217     -13
dpkg_main                                           3835    3820     -15
read_line_input                                     3134    3110     -24
sysctl_main                                          232     203     -29
config_open                                           40      10     -30
WARN_BAD_LINE                                         44       -     -44
login_main                                          1714    1575    -139
------------------------------------------------------------------------------
(add/remove: 5/1 grow/shrink: 8/74 up/down: 174/-737)        Total: -563 bytes
2008-07-21 23:05:26 +00:00

130 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 FAST_FUNC print_login_issue(const char *issue_file, const char *tty)
{
FILE *fp;
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 */
fp = fopen_for_read(issue_file);
if (!fp)
return;
while ((c = fgetc(fp)) != EOF) {
outbuf = buf;
buf[0] = c;
buf[1] = '\0';
if (c == '\n') {
buf[1] = '\r';
buf[2] = '\0';
}
if (c == '\\' || c == '%') {
c = fgetc(fp);
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':
outbuf = uts.domainname;
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(fp);
fflush(stdout);
}
void FAST_FUNC 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 FAST_FUNC 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! */
}