fmtuid.c revision 3e14f97f673e8a630f076077de35afdd43dc1587
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2010 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* Glenn Fowler
* AT&T Bell Laboratories
*
* uid number -> name
*/
#if defined(__STDPP__directive) && defined(__STDPP__hide)
__STDPP__directive pragma pp:hide getpwuid
#else
#define getpwuid ______getpwuid
#endif
#include <ast.h>
#include <cdt.h>
#include <pwd.h>
#if defined(__STDPP__directive) && defined(__STDPP__hide)
__STDPP__directive pragma pp:nohide getpwuid
#else
#undef getpwuid
#endif
extern struct passwd* getpwuid(uid_t);
typedef struct Id_s
{
Dtlink_t link;
int id;
char name[1];
} Id_t;
/*
* return uid name given uid number
*/
char*
fmtuid(int uid)
{
register Id_t* ip;
register char* name;
register struct passwd* pw;
int z;
static Dt_t* dict;
static Dtdisc_t disc;
if (!dict)
{
disc.key = offsetof(Id_t, id);
disc.size = sizeof(int);
dict = dtopen(&disc, Dthash);
}
else if (ip = (Id_t*)dtmatch(dict, &uid))
return ip->name;
if (pw = getpwuid(uid))
{
name = pw->pw_name;
#if _WINIX
if (streq(name, "Administrator"))
name = "root";
#endif
}
else if (uid == 0)
name = "root";
else
{
name = fmtbuf(z = sizeof(uid) * 3 + 1);
sfsprintf(name, z, "%I*d", sizeof(uid), uid);
}
if (dict && (ip = newof(0, Id_t, 1, strlen(name))))
{
ip->id = uid;
strcpy(ip->name, name);
dtinsert(dict, ip);
return ip->name;
}
return name;
}