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/*
* ========================================================================
* Copyright 2013-2021 Eduardo Chappa
* Copyright 2006 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* ========================================================================
*/
#include <system.h>
#include "../charconv/filesys.h"
#include "fnexpand.h"
/*----------------------------------------------------------------------
Expand the ~ in a file ala the csh (as home directory)
Args: buf -- The filename to expand (nothing happens unless begins with ~)
len -- The length of the buffer passed in (expansion is in place)
Result: Expanded string is returned using same storage as passed in.
If expansion fails, NULL is returned
----*/
char *
fnexpand(char *buf, int len)
{
#ifdef _WINDOWS
/* We used to use ps_global->home_dir, now we have to build it */
if(*buf == '~' && *(buf+1) == '\\'){
char temp_path[_MAX_PATH], home_buf[_MAX_PATH], *temp_home_str;
if(getenv("HOME") != NULL)
temp_home_str = getenv("HOME");
else{
/* should eventually strip this out of get_user_info */
char *p, *q;
if((p = (char *) getenv("HOMEDRIVE"))
&& (q = (char *) getenv("HOMEPATH")))
snprintf(home_buf, sizeof(home_buf), "%s%s", p, q);
else
snprintf(home_buf, sizeof(home_buf), "%c:\\", '@' + _getdrive());
temp_home_str = home_buf;
}
snprintf(temp_path, sizeof(temp_path), "%s", buf+1);
snprintf(buf, sizeof(buf), "%s%s", temp_path, fname_to_utf8(temp_home_str));
}
return(buf);
#else /* UNIX */
struct passwd *pw;
register char *x,*y;
char name[20], *tbuf;
if(*buf == '~') {
for(x = buf+1, y = name;
*x != '/' && *x != '\0' && y < name + sizeof(name)-1;
*y++ = *x++)
;
*y = '\0';
if(x == buf + 1)
pw = getpwuid(getuid());
else
pw = getpwnam(name);
if(pw == NULL)
return((char *)NULL);
if(strlen(pw->pw_dir) + strlen(buf) > len) {
return((char *)NULL);
}
if((tbuf = (char *) malloc((len+1)*sizeof(char))) != NULL){
snprintf(tbuf, len, "%s%s", pw->pw_dir, x);
snprintf(buf, len, "%s", tbuf);
free((void *)tbuf);
}
}
return(len ? buf : (char *)NULL);
#endif /* UNIX */
}
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