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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 <general.h>
#include "../charconv/utf8.h"
#include "../charconv/filesys.h"
#include "pw_stuff.h"
/*
* internal prototypes
*/
#ifndef _WINDOWS
static char *gcos_name(char *, char *);
/*----------------------------------------------------------------------
Pull the name out of the gcos field if we have that sort of /etc/passwd
Args: gcos_field -- The long name or GCOS field to be parsed
logname -- Replaces occurrences of & with logname string
Result: returns pointer to buffer with name
----*/
static char *
gcos_name(char *gcos_field, char *logname)
{
static char fullname[MAX_FULLNAME+1];
register char *fncp, *gcoscp, *lncp, *end;
/*
* Full name is all chars up to first ',' (or whole gcos, if no ',').
* Replace any & with Logname.
*/
for(fncp = fullname, gcoscp= gcos_field, end = fullname + MAX_FULLNAME;
(*gcoscp != ',' && *gcoscp != '\0' && fncp < end);
gcoscp++){
if(*gcoscp == '&'){
for(lncp = logname; *lncp && fncp < end; fncp++, lncp++)
*fncp = (lncp == logname) ? toupper((unsigned char) (*lncp))
: (*lncp);
}else
*fncp++ = *gcoscp;
}
*fncp = '\0';
return(fullname);
}
#endif /* !_WINDOWS */
/*----------------------------------------------------------------------
Fill in homedir, login, and fullname for the logged in user.
These are all pointers to static storage so need to be copied
in the caller.
Args: ui -- struct pointer to pass back answers
Result: fills in the fields
----*/
void
get_user_info(struct user_info *ui)
{
#ifndef _WINDOWS
struct passwd *unix_pwd;
unix_pwd = getpwuid(getuid());
if(unix_pwd == NULL) {
ui->homedir = (char *) malloc(sizeof(char));
ui->homedir[0] = '\0';
ui->login = (char *) malloc(sizeof(char));
ui->login[0] = '\0';
ui->fullname = (char *) malloc(sizeof(char));
ui->fullname[0] = '\0';
}else {
char *s;
size_t len;
len = strlen(fname_to_utf8(unix_pwd->pw_dir));
ui->homedir = (char *) malloc((len+1) * sizeof(char));
snprintf(ui->homedir, len+1, "%s", fname_to_utf8(unix_pwd->pw_dir));
len = strlen(fname_to_utf8(unix_pwd->pw_name));
ui->login = (char *) malloc((len+1) * sizeof(char));
snprintf(ui->login, len+1, "%s", fname_to_utf8(unix_pwd->pw_name));
if((s = gcos_name(unix_pwd->pw_gecos, unix_pwd->pw_name)) != NULL){
len = strlen(fname_to_utf8(s));
ui->fullname = (char *) malloc((len+1) * sizeof(char));
snprintf(ui->fullname, len+1, "%s", fname_to_utf8(s));
}
}
#else /* _WINDOWS */
char buf[_MAX_PATH], *p, *q;
TCHAR lptstr_buf[_MAX_PATH];
int len = _MAX_PATH;
if(GetUserName(lptstr_buf, &len))
ui->login = lptstr_to_utf8(lptstr_buf);
else
ui->login = our_getenv("USERNAME");
if((p = our_getenv("HOMEDRIVE"))
&& (q = our_getenv("HOMEPATH")))
snprintf(buf, sizeof(buf), "%s%s", p, q);
else
snprintf(buf, sizeof(buf), "%c:\\", '@' + _getdrive());
if(p)
free((void *)p);
if(q)
free((void *)q);
ui->homedir = (char *) malloc((strlen(buf)+1) * sizeof(char));
if(ui->homedir){
strncpy(ui->homedir, buf, strlen(buf));
ui->homedir[strlen(buf)] = '\0';
}
ui->fullname = (char *) malloc(sizeof(char));
if(ui->fullname)
ui->fullname[0] = '\0';
#endif /* _WINDOWS */
}
/*----------------------------------------------------------------------
Look up a userid on the local system and return rfc822 address
Args: name -- possible login name on local system
Result: returns NULL or pointer to alloc'd string rfc822 address.
----*/
char *
local_name_lookup(char *name)
{
#ifndef _WINDOWS
struct passwd *pw = getpwnam(name);
if(pw == NULL){
char *p;
for(p = name; *p; p++)
if(isupper((unsigned char)*p))
break;
/* try changing it to all lower case */
if(p && *p){
char lcase[256];
size_t l;
snprintf(lcase, sizeof(lcase), "%s", name);
l = strlen(name);
for(p = lcase; *p; p++)
if(isupper((unsigned char)*p))
*p = tolower((unsigned char)*p);
pw = getpwnam(lcase);
if(pw){
strncpy(name, lcase, l+1);
name[l] = '\0';
}
}
}
if(pw != NULL){
char *gn, *s = NULL;
size_t l;
if((gn = gcos_name(pw->pw_gecos, name)) != NULL
&& (s = (char *) malloc(l = ((strlen(gn) + 1) * sizeof(char)))) != NULL)
snprintf(s, l, "%s", gn);
return(s);
}
else
return((char *) NULL);
#else /* _WINDOWS */
return(NULL);
#endif /* _WINDOWS */
}
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