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/*
* "$Id: env.c 8712 2009-06-15 17:13:52Z mike $"
*
* Environment management routines for the Common UNIX Printing System (CUPS).
*
* Copyright 2007 by Apple Inc.
* Copyright 1997-2006 by Easy Software Products, all rights reserved.
*
* These coded instructions, statements, and computer programs are the
* property of Apple Inc. and are protected by Federal copyright
* law. Distribution and use rights are outlined in the file "LICENSE.txt"
* which should have been included with this file. If this file is
* file is missing or damaged, see the license at "http://www.cups.org/".
*
* Contents:
*
* cupsdInitEnv() - Initialize the current environment with standard
* variables.
* cupsdLoadEnv() - Copy common environment variables into an array.
* cupsdSetEnv() - Set a common environment variable.
* cupsdSetEnvf() - Set a formatted common environment variable.
* clear_env() - Clear common environment variables.
*/
/*
* Include necessary headers...
*/
#include "cupsd.h"
/*
* Local globals...
*/
static int num_common_env = 0; /* Number of common env vars */
static char *common_env[MAX_ENV]; /* Common env vars */
/*
* Local functions...
*/
static void clear_env(void);
/*
* 'cupsdInitEnv()' - Initialize the current environment with standard variables.
*/
void
cupsdInitEnv(void)
{
/*
* Clear existing environment variables...
*/
clear_env();
#if defined(__APPLE__)
/*
* Add special voodoo magic for MacOS X - this allows MacOS X
* programs to access their bundle resources properly...
*
* This string is replaced in cupsdStartProcess()...
*/
cupsdSetString(common_env, "<CFProcessPath>");
num_common_env = 1;
#endif /* __APPLE__ */
/*
* Set common variables...
*/
cupsdSetEnv("CUPS_CACHEDIR", CacheDir);
cupsdSetEnv("CUPS_DATADIR", DataDir);
cupsdSetEnv("CUPS_DOCROOT", DocumentRoot);
cupsdSetEnv("CUPS_FONTPATH", FontPath);
cupsdSetEnv("CUPS_REQUESTROOT", RequestRoot);
cupsdSetEnv("CUPS_SERVERBIN", ServerBin);
cupsdSetEnv("CUPS_SERVERROOT", ServerRoot);
cupsdSetEnv("CUPS_STATEDIR", StateDir);
cupsdSetEnv("DYLD_LIBRARY_PATH", NULL);
cupsdSetEnv("HOME", TempDir);
cupsdSetEnv("LD_ASSUME_KERNEL", NULL);
cupsdSetEnv("LD_LIBRARY_PATH", NULL);
cupsdSetEnv("LD_PRELOAD", NULL);
cupsdSetEnv("NLSPATH", NULL);
cupsdSetEnvf("PATH", "%s/filter:" CUPS_BINDIR ":" CUPS_SBINDIR
":/bin:/usr/bin", ServerBin);
cupsdSetEnv("SERVER_ADMIN", ServerAdmin);
cupsdSetEnv("SHLIB_PATH", NULL);
cupsdSetEnv("SOFTWARE", CUPS_MINIMAL);
cupsdSetEnv("TMPDIR", TempDir);
cupsdSetEnv("TZ", NULL);
cupsdSetEnv("USER", "root");
cupsdSetEnv("VG_ARGS", NULL);
}
/*
* 'cupsdLoadEnv()' - Copy common environment variables into an array.
*/
int /* O - Number of environment variables */
cupsdLoadEnv(char *envp[], /* I - Environment array */
int envmax) /* I - Maximum number of elements */
{
int i; /* Looping var */
/*
* Leave room for a NULL pointer at the end...
*/
envmax --;
/*
* Copy pointers to the environment...
*/
for (i = 0; i < num_common_env && i < envmax; i ++)
envp[i] = common_env[i];
/*
* NULL terminate the environment array and return the number of
* elements we added...
*/
envp[i] = NULL;
return (i);
}
/*
* 'cupsdSetEnv()' - Set a common environment variable.
*/
void
cupsdSetEnv(const char *name, /* I - Name of variable */
const char *value) /* I - Value of variable */
{
int i, /* Looping var */
namelen; /* Length of name */
/*
* If "value" is NULL, try getting value from current environment...
*/
if (!value)
value = getenv(name);
if (!value)
return;
/*
* See if this variable has already been defined...
*/
for (i = 0, namelen = strlen(name); i < num_common_env; i ++)
if (!strncmp(common_env[i], name, namelen) && common_env[i][namelen] == '=')
break;
if (i >= num_common_env)
{
/*
* Check for room...
*/
if (num_common_env >= (int)(sizeof(common_env) / sizeof(common_env[0])))
{
cupsdLogMessage(CUPSD_LOG_ERROR,
"cupsdSetEnv: Too many environment variables set!");
return;
}
num_common_env ++;
}
/*
* Set the new environment variable...
*/
cupsdSetStringf(common_env + i, "%s=%s", name, value);
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdSetEnv: %s", common_env[i]);
}
/*
* 'cupsdSetEnvf()' - Set a formatted common environment variable.
*/
void
cupsdSetEnvf(const char *name, /* I - Name of variable */
const char *value, /* I - Printf-style value of variable */
...) /* I - Additional args as needed */
{
char v[4096]; /* Formatting string value */
va_list ap; /* Argument pointer */
/*
* Format the value string...
*/
va_start(ap, value);
vsnprintf(v, sizeof(v), value, ap);
va_end(ap);
/*
* Set the env variable...
*/
cupsdSetEnv(name, v);
}
/*
* 'clear_env()' - Clear common environment variables.
*/
static void
clear_env(void)
{
int i; /* Looping var */
for (i = 0; i < num_common_env; i ++)
cupsdClearString(common_env + i);
num_common_env = 0;
}
/*
* End of "$Id: env.c 8712 2009-06-15 17:13:52Z mike $".
*/
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