/* * "$Id: env.c 9459 2011-01-11 03:48:42Z mike $" * * Environment management routines for the CUPS scheduler. * * Copyright 2007-2011 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. * cupsdUpdateEnv() - Update the environment for the configured directories. * clear_env() - Clear common environment variables. * find_env() - Find a common environment variable. */ /* * 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); static int find_env(const char *name); /* * '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__ */ } /* * '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; /* Index into environent array */ /* * 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... */ if ((i = find_env(name)) < 0) { /* * 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; } i = num_common_env; 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); } /* * 'cupsdUpdateEnv()' - Update the environment for the configured directories. */ void cupsdUpdateEnv(void) { /* * Set common variables... */ #define set_if_undefined(name,value) if (find_env(name) < 0) cupsdSetEnv(name,value) set_if_undefined("CUPS_CACHEDIR", CacheDir); set_if_undefined("CUPS_DATADIR", DataDir); set_if_undefined("CUPS_DOCROOT", DocumentRoot); set_if_undefined("CUPS_FONTPATH", FontPath); set_if_undefined("CUPS_REQUESTROOT", RequestRoot); set_if_undefined("CUPS_SERVERBIN", ServerBin); set_if_undefined("CUPS_SERVERROOT", ServerRoot); set_if_undefined("CUPS_STATEDIR", StateDir); set_if_undefined("DYLD_LIBRARY_PATH", NULL); set_if_undefined("HOME", TempDir); set_if_undefined("LD_ASSUME_KERNEL", NULL); set_if_undefined("LD_LIBRARY_PATH", NULL); set_if_undefined("LD_PRELOAD", NULL); set_if_undefined("NLSPATH", NULL); if (find_env("PATH") < 0) cupsdSetEnvf("PATH", "%s/filter:" CUPS_BINDIR ":" CUPS_SBINDIR ":/bin:/usr/bin", ServerBin); set_if_undefined("SERVER_ADMIN", ServerAdmin); set_if_undefined("SHLIB_PATH", NULL); set_if_undefined("SOFTWARE", CUPS_MINIMAL); set_if_undefined("TMPDIR", TempDir); set_if_undefined("TZ", NULL); set_if_undefined("USER", "root"); set_if_undefined("VG_ARGS", NULL); cupsdSetEnvf("CUPS_MAX_MESSAGE", "%d", CUPSD_SB_BUFFER_SIZE - 1); } /* * '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; } /* * 'find_env()' - Find a common environment variable. */ static int /* O - Index or -1 if not found */ find_env(const char *name) /* I - Variable name */ { int i; /* Looping var */ size_t namelen; /* Length of name */ for (i = 0, namelen = strlen(name); i < num_common_env; i ++) if (!strncmp(common_env[i], name, namelen) && common_env[i][namelen] == '=') return (i); return (-1); } /* * End of "$Id: env.c 9459 2011-01-11 03:48:42Z mike $". */