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 * uid name -> number 28 */ 29 30 #if defined(__STDPP__directive) && defined(__STDPP__hide) 31 __STDPP__directive pragma pp:hide getpwnam getpwuid 32 #else 33 #define getpwnam ______getpwnam 34 #define getpwuid ______getpwuid 35 #endif 36 37 #include <ast.h> 38 #include <cdt.h> 39 #include <pwd.h> 40 41 #if defined(__STDPP__directive) && defined(__STDPP__hide) 42 __STDPP__directive pragma pp:nohide getpwnam getpwuid 43 #else 44 #undef getpwnam 45 #undef getpwuid 46 #endif 47 48 extern struct passwd* getpwnam(const char*); 49 extern struct passwd* getpwuid(uid_t); 50 51 typedef struct Id_s 52 { 53 Dtlink_t link; 54 int id; 55 char name[1]; 56 } Id_t; 57 58 /* 59 * return uid number given uid name 60 * -1 on first error for a given name 61 * -2 on subsequent errors for a given name 62 */ 63 64 int 65 struid(const char* name) 66 { 67 register Id_t* ip; 68 register struct passwd* pw; 69 int id; 70 char* e; 71 72 static Dt_t* dict; 73 static Dtdisc_t disc; 74 75 if (!dict) 76 { 77 disc.key = offsetof(Id_t, name); 78 dict = dtopen(&disc, Dthash); 79 } 80 else if (ip = (Id_t*)dtmatch(dict, name)) 81 return ip->id; 82 if (pw = getpwnam(name)) 83 id = pw->pw_uid; 84 else 85 { 86 id = strtol(name, &e, 0); 87 #if _WINIX 88 if (!*e) 89 { 90 if (!getpwuid(id)) 91 id = -1; 92 } 93 else if (streq(name, "root") && (pw = getpwnam("Administrator"))) 94 id = pw->pw_uid; 95 else 96 id = -1; 97 #else 98 if (*e || !getpwuid(id)) 99 id = -1; 100 #endif 101 } 102 if (dict && (ip = newof(0, Id_t, 1, strlen(name)))) 103 { 104 strcpy(ip->name, name); 105 ip->id = id >= 0 ? id : -2; 106 dtinsert(dict, ip); 107 } 108 return id; 109 } 110