1*4887Schin /*********************************************************************** 2*4887Schin * * 3*4887Schin * This software is part of the ast package * 4*4887Schin * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5*4887Schin * and is licensed under the * 6*4887Schin * Common Public License, Version 1.0 * 7*4887Schin * by AT&T Knowledge Ventures * 8*4887Schin * * 9*4887Schin * A copy of the License is available at * 10*4887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 11*4887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12*4887Schin * * 13*4887Schin * Information and Software Systems Research * 14*4887Schin * AT&T Research * 15*4887Schin * Florham Park NJ * 16*4887Schin * * 17*4887Schin * Glenn Fowler <gsf@research.att.com> * 18*4887Schin * David Korn <dgk@research.att.com> * 19*4887Schin * Phong Vo <kpv@research.att.com> * 20*4887Schin * * 21*4887Schin ***********************************************************************/ 22*4887Schin #pragma prototyped 23*4887Schin /* 24*4887Schin * Glenn Fowler 25*4887Schin * AT&T Bell Laboratories 26*4887Schin * 27*4887Schin * uid name -> number 28*4887Schin */ 29*4887Schin 30*4887Schin #if defined(__STDPP__directive) && defined(__STDPP__hide) 31*4887Schin __STDPP__directive pragma pp:hide getpwnam getpwuid 32*4887Schin #else 33*4887Schin #define getpwnam ______getpwnam 34*4887Schin #define getpwuid ______getpwuid 35*4887Schin #endif 36*4887Schin 37*4887Schin #include <ast.h> 38*4887Schin #include <cdt.h> 39*4887Schin #include <pwd.h> 40*4887Schin 41*4887Schin #if defined(__STDPP__directive) && defined(__STDPP__hide) 42*4887Schin __STDPP__directive pragma pp:nohide getpwnam getpwuid 43*4887Schin #else 44*4887Schin #undef getpwnam 45*4887Schin #undef getpwuid 46*4887Schin #endif 47*4887Schin 48*4887Schin extern struct passwd* getpwnam(const char*); 49*4887Schin extern struct passwd* getpwuid(uid_t); 50*4887Schin 51*4887Schin typedef struct Id_s 52*4887Schin { 53*4887Schin Dtlink_t link; 54*4887Schin int id; 55*4887Schin char name[1]; 56*4887Schin } Id_t; 57*4887Schin 58*4887Schin /* 59*4887Schin * return uid number given uid name 60*4887Schin * -1 on first error for a given name 61*4887Schin * -2 on subsequent errors for a given name 62*4887Schin */ 63*4887Schin 64*4887Schin int 65*4887Schin struid(const char* name) 66*4887Schin { 67*4887Schin register Id_t* ip; 68*4887Schin register struct passwd* pw; 69*4887Schin int id; 70*4887Schin char* e; 71*4887Schin 72*4887Schin static Dt_t* dict; 73*4887Schin static Dtdisc_t disc; 74*4887Schin 75*4887Schin if (!dict) 76*4887Schin { 77*4887Schin disc.key = offsetof(Id_t, name); 78*4887Schin dict = dtopen(&disc, Dthash); 79*4887Schin } 80*4887Schin else if (ip = (Id_t*)dtmatch(dict, name)) 81*4887Schin return ip->id; 82*4887Schin if (pw = getpwnam(name)) 83*4887Schin id = pw->pw_uid; 84*4887Schin else 85*4887Schin { 86*4887Schin id = strtol(name, &e, 0); 87*4887Schin #if _WINIX 88*4887Schin if (!*e) 89*4887Schin { 90*4887Schin if (!getpwuid(id)) 91*4887Schin id = -1; 92*4887Schin } 93*4887Schin else if (streq(name, "root") && (pw = getpwnam("Administrator"))) 94*4887Schin id = pw->pw_uid; 95*4887Schin else 96*4887Schin id = -1; 97*4887Schin #else 98*4887Schin if (*e || !getpwuid(id)) 99*4887Schin id = -1; 100*4887Schin #endif 101*4887Schin } 102*4887Schin if (dict && (ip = newof(0, Id_t, 1, strlen(name)))) 103*4887Schin { 104*4887Schin strcpy(ip->name, name); 105*4887Schin ip->id = id >= 0 ? id : -2; 106*4887Schin dtinsert(dict, ip); 107*4887Schin } 108*4887Schin return id; 109*4887Schin } 110