1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 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 46 extern struct group* getgrgid(gid_t); 47 48 typedef 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 59 char* 60 fmtgid(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, Dthash); 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