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/************************************************************************
* NCSA HTTPd Server
* Software Development Group
* National Center for Supercomputing Applications
* University of Illinois at Urbana-Champaign
* 605 E. Springfield, Champaign, IL 61820
* httpd@ncsa.uiuc.edu
*
* Copyright (C) 1995, Board of Trustees of the University of Illinois
*
************************************************************************
*
*env.c,v 1.15 1995/11/03 21:56:52 blong Exp
*env.c,v
*Revision 1.15 1995/11/03 21:56:52 blong
*Various fixes for the final
*
* Revision 1.14 1995/10/06 19:15:15 blong
* various fixes for 1.5b6, including:
* CoreDirectory directive added
* LogType now LogOptions
* multiple fixes to ErrorDocument in virtualhost configuration
* preliminary HTTP/1.1 host: matching
* LOCAL hack
* SERVER_ADMIN CGI variable
*
* Revision 1.13 1995/09/21 22:50:31 blong
* General fixes for 1.5b5
*
* Revision 1.12 1995/08/18 05:19:48 blong
* Fixed portability issues for QNX, ATT, ConvexOS, etc.
*
* Revision 1.11 1995/08/17 17:53:45 blong
* Added support for Linux FD_PASS
* Added NIS support
* fixed array bounds write in env.c
* various portability fixes
* added ability to KEEP_ENV and KEEP_AUTH in continue_request
*
* Revision 1.10 1995/08/05 16:35:15 guillory
* Put multiple referer ignore in. SSG 8/5/95
*
* Revision 1.9 1995/08/04 16:55:12 guillory
* Changes to allow fewer realloc calls in merge_header SSG 8/4/95
*
* Revision 1.8 1995/08/04 14:58:19 blong
* Small fix for access (for test if none)
* other fixes for beta 2
*
* Revision 1.7 1995/07/25 06:43:05 blong
* Various code cleaning exercises, including commenting all #endif's
*
* Revision 1.6 1995/07/23 07:27:43 blong
* more fixups for beta
*
* Revision 1.5 1995/07/21 22:38:05 blong
* Some file renaming, moving of functions for greater modularity
* modifications for cleaner compile with -Wall
* no a single path for A_STD_DOCUMENT files
*
* Revision 1.4 1995/07/17 22:45:04 blong
* 1.5 Copyright Information
*
* Revision 1.3 1995/07/09 20:37:16 guillory
* Merged blong and sguillory changes - buffered I/O SSG 7/9/95
*
* Revision 1.2 1995/06/27 01:20:34 blong
* Rewrite of env handling routines (Added to per_request structure)
*
* Revision 1.1 1995/06/26 23:23:22 blong
* New module for dealing with the environment
*
*
* env.c contains:
* All functions for dealing with the environment array.
*
*/
#include "config.h"
#include "portability.h"
#ifndef NO_STDLIB_H
# include <stdlib.h>
#endif /* NO_STDLIB_H */
#include <string.h>
#include "constants.h"
#include "env.h"
#include "http_log.h"
/* Older version, required external help. Newer version should be self
contained for easier extensibility */
/* This will change the value of an environment variable to *value
if found. Returns TRUE if the replace took place, FALSE otherwise */
int replace_env_str(per_request *reqInfo, char *name, char *value)
{
register int i, len;
for (i = 0, len = strlen(name); reqInfo->env[i]; i++) {
if (strncmp(reqInfo->env[i], name, len) == 0) {
free(reqInfo->env[i]);
if (i < reqInfo->num_env) {
reqInfo->env[i] = reqInfo->env[--(reqInfo->num_env)];
reqInfo->env_len[i] = reqInfo->env_len[reqInfo->num_env];
reqInfo->env[reqInfo->num_env] = NULL;
}
else {
reqInfo->env[i] = NULL;
reqInfo->num_env--;
}
make_env_str(reqInfo, name, value);
return TRUE;
}
}
return FALSE;
}
/* Go down the array of environment variables, free'ing as you go */
void free_env(per_request *reqInfo) {
int x;
for(x=0;reqInfo->env[x];x++)
free(reqInfo->env[x]);
free(reqInfo->env);
free(reqInfo->env_len);
reqInfo->env = NULL;
}
/* If the environment variable has already been set, this will append
the value to it, of the form "name=old, new"
Assumes that "header" is a pointer to a string that is longer than
the string it contains
*/
int merge_header(per_request *reqInfo, char *header, char *value)
{
register int l,lt;
int len, ndx;
char **t;
len = strlen(value);
for(l=0;header[l];++l);
header[l] = '=';
header[++l] = '\0';
for(ndx = 0, t=reqInfo->env; *t; ++t, ndx++) {
if(!strncmp(*t,header,l)) {
lt = strlen(*t);
if ((lt + len + 2) > reqInfo->env_len[ndx]) {
int n = reqInfo->env_len[ndx] / BIG_ENV_VAR_LEN + 1;
if(!(*t = (char *) realloc(*t,n * BIG_ENV_VAR_LEN*sizeof(char))))
die(reqInfo, SC_NO_MEMORY,"merge_header");
reqInfo->env_len[ndx] = n * BIG_ENV_VAR_LEN;
}
(*t)[lt++] = ',';
(*t)[lt++] = ' ';
strcpy(&((*t)[lt]),value);
return 1;
}
}
header[l-1] = '\0';
return 0;
}
/* make_env_str will add the environment variable name=value to
the environment array of a per_request structure. It will also
auto grow the structure as necessary using ENV_BEG_SIZE and ENV_INC_SIZE */
int make_env_str(per_request *reqInfo, char *name, char *value)
{
int n;
if (reqInfo->env == NULL) {
if (!(reqInfo->env = (char **) malloc(ENV_BEG_SIZE * sizeof(char *)))
|| !(reqInfo->env_len = (int*) malloc(ENV_BEG_SIZE * sizeof(int))))
die(reqInfo,SC_NO_MEMORY,"make_env_str:malloc");
reqInfo->max_env = ENV_BEG_SIZE;
}
if ((reqInfo->num_env+1) >= reqInfo->max_env) {
if (!(reqInfo->env = (char **) realloc(reqInfo->env,
((reqInfo->max_env+ENV_INC_SIZE) * sizeof(char *))))
|| !(reqInfo->env_len = (int*) realloc(reqInfo->env_len,
(reqInfo->max_env + ENV_INC_SIZE) * sizeof(int))))
die(reqInfo,SC_NO_MEMORY,"make_env_str:realloc");
reqInfo->max_env += ENV_INC_SIZE;
}
if (!(reqInfo->env[reqInfo->num_env] =
(char *) malloc(n = (strlen(name) + strlen(value) + 2))))
die(reqInfo,SC_NO_MEMORY,"make_env_str:add");
strcpy(reqInfo->env[reqInfo->num_env], name);
strcat(reqInfo->env[reqInfo->num_env],"=");
strcat(reqInfo->env[reqInfo->num_env],value);
reqInfo->env_len[reqInfo->num_env] = n;
reqInfo->num_env++;
reqInfo->env[reqInfo->num_env] = NULL;
return 1;
}
/* Debugging dump of environment array */
/*
void print_env (FILE* fp, char** env)
{
int n = 0;
while (env[n]) {
fprintf (fp, "Var %d: %s\n", n, env[n]);
n++;
}
}
*/
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