1/*********************************************************************** 2* * 3* This software is part of the ast package * 4* Copyright (c) 1985-2011 AT&T Intellectual Property * 5* and is licensed under the * 6* Eclipse Public License, Version 1.0 * 7* by AT&T Intellectual Property * 8* * 9* A copy of the License is available at * 10* http://www.eclipse.org/org/documents/epl-v10.html * 11* (with md5 checksum b35adb5213ca9657e911e9befb180842) * 12* * 13* Information and Software Systems Research * 14* AT&T Research * 15* Florham Park NJ * 16* * 17* Glenn Fowler <gsf@research.att.com> * 18* David Korn <dgk@research.att.com> * 19* Phong Vo <kpv@research.att.com> * 20* * 21***********************************************************************/ 22#pragma prototyped 23/* 24 * Glenn Fowler 25 * AT&T Bell Laboratories 26 * 27 * cached gid number -> name 28 */ 29 30#if defined(__STDPP__directive) && defined(__STDPP__hide) 31__STDPP__directive pragma pp:hide getgrgid 32#else 33#define getgrgid ______getgrgid 34#endif 35 36#include <ast.h> 37#include <cdt.h> 38#include <grp.h> 39 40#if defined(__STDPP__directive) && defined(__STDPP__hide) 41__STDPP__directive pragma pp:nohide getgrgid 42#else 43#undef getgrgid 44#endif 45 46extern struct group* getgrgid(gid_t); 47 48typedef struct Id_s 49{ 50 Dtlink_t link; 51 int id; 52 char name[1]; 53} Id_t; 54 55/* 56 * return gid name given gid number 57 */ 58 59char* 60fmtgid(int gid) 61{ 62 register Id_t* ip; 63 register char* name; 64 register struct group* gr; 65 int z; 66 67 static Dt_t* dict; 68 static Dtdisc_t disc; 69 70 if (!dict) 71 { 72 disc.key = offsetof(Id_t, id); 73 disc.size = sizeof(int); 74 dict = dtopen(&disc, Dtset); 75 } 76 else if (ip = (Id_t*)dtmatch(dict, &gid)) 77 return ip->name; 78 if (gr = getgrgid(gid)) 79 { 80 name = gr->gr_name; 81#if _WINIX 82 if (streq(name, "Administrators")) 83 name = "sys"; 84#endif 85 } 86 else if (gid == 0) 87 name = "sys"; 88 else 89 { 90 name = fmtbuf(z = sizeof(gid) * 3 + 1); 91 sfsprintf(name, z, "%I*d", sizeof(gid), gid); 92 } 93 if (dict && (ip = newof(0, Id_t, 1, strlen(name)))) 94 { 95 ip->id = gid; 96 strcpy(ip->name, name); 97 dtinsert(dict, ip); 98 return ip->name; 99 } 100 return name; 101} 102