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(scrub_env): change to only accept a listed set of variables,

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including only non-filename contents for TERMCAP


git-svn-id: http://svn0.us-east.freebsd.org/base/head/contrib/telnet@69825 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
This commit is contained in:
assar
2000-12-10 20:50:20 +00:00
parent fe910aa69a
commit 40b68302ee
1 changed files with 37 additions and 23 deletions
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60
telnetd/sys_term.c
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@@ -1839,34 +1839,48 @@ addarg(argv, val)
/* /*
* scrub_env() * scrub_env()
* *
* Remove a few things from the environment that * We only accept the environment variables listed below.
* don't need to be there.
*/ */
void void
scrub_env() scrub_env()
{ {
register char **cpp, **cpp2; static const char *reject[] = {
"TERMCAP=/",
NULL
};
for (cpp2 = cpp = environ; *cpp; cpp++) { static const char *accept[] = {
#ifdef __FreeBSD__ "XAUTH=", "XAUTHORITY=", "DISPLAY=",
if (strncmp(*cpp, "LD_LIBRARY_PATH=", 16) && "TERM=",
strncmp(*cpp, "LD_PRELOAD=", 11) && "EDITOR=",
#else "PAGER=",
if (strncmp(*cpp, "LD_", 3) && "LOGNAME=",
strncmp(*cpp, "_RLD_", 5) && "POSIXLY_CORRECT=",
strncmp(*cpp, "LIBPATH=", 8) && "PRINTER=",
#endif NULL
strncmp(*cpp, "LOCALDOMAIN=", 12) && };
strncmp(*cpp, "RES_OPTIONS=", 12) &&
strncmp(*cpp, "TERMINFO=", 9) && char **cpp, **cpp2;
strncmp(*cpp, "TERMINFO_DIRS=", 14) && const char **p;
strncmp(*cpp, "TERMPATH=", 9) &&
strncmp(*cpp, "TERMCAP=/", 9) && for (cpp2 = cpp = environ; *cpp; cpp++) {
strncmp(*cpp, "ENV=", 4) && int reject_it = 0;
strncmp(*cpp, "IFS=", 4))
*cpp2++ = *cpp; for(p = reject; *p; p++)
} if(strncmp(*cpp, *p, strlen(*p)) == 0) {
*cpp2 = 0; reject_it = 1;
break;
}
if (reject_it)
continue;
for(p = accept; *p; p++)
if(strncmp(*cpp, *p, strlen(*p)) == 0)
break;
if(*p != NULL)
*cpp2++ = *cpp;
}
*cpp2 = NULL;
} }
/* /*