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/*
* Copyright (C) 2003-2009 FAUmachine Team <info@faumachine.org>.
* This program is free software. You can redistribute it and/or modify it
* under the terms of the GNU General Public License, either version 2 of
* the License, or (at your option) any later version. See COPYING.
*/
/*
* Replace variables in the form "$some_var" with the value from the
* corresponding ennvironment variable.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include "env.h"
#include "glue-log.h"
static char buffer[1024];
char *
env_replace(const char *src)
{
char *dst;
for (dst = buffer; *src; src++) {
if (*src == '$') {
src++;
if (('a' <= *src && *src <= 'z')
|| ('A' <= *src && *src <= 'Z')
|| *src == '_') {
char env_var[64];
char *env_ptr;
env_ptr = env_var;
while (*src && (
('a' <= *src && *src <= 'z')
|| ('A' <= *src && *src <= 'Z')
|| ('0' <= *src && *src <= '9')
|| *src == '_'
)
) {
*env_ptr++ = *src++;
}
*env_ptr = 0;
env_ptr = getenv(env_var);
if (env_ptr) {
strcpy(dst, env_ptr);
dst += strlen(env_ptr);
} else {
faum_log(FAUM_LOG_WARNING, "env",
__func__,
"reference to unset "
"environment variable %s\n",
env_var);
}
if (! *src) {
break;
}
} else if('1' <= *src && *src <= '9') {
*dst++ = '$';
}
}
*dst++ = *src;
}
*dst = 0;
return buffer;
}
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