1 /*- 2 * Copyright (c) 1985, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.proprietary.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)uucpname.c 8.1 (Berkeley) 06/06/93"; 10 #endif /* not lint */ 11 12 #include "uucp.h" 13 #include <sys/stat.h> 14 15 /*LINTLIBRARY*/ 16 17 #ifdef GETMYHNAME 18 #include <UNET/unetio.h> 19 #endif 20 21 #ifdef UNAME 22 /* Use USG uname() library routine */ 23 #include <sys/utsname.h> 24 #endif 25 26 #ifdef CCWHOAMI 27 /* Compile in 'sysname' as found in standard(!) include file */ 28 #include <whoami.h> 29 #endif 30 char Myfullname[64]; 31 32 /* 33 * uucpname(name) get the uucp name 34 * 35 * return code - none 36 */ 37 uucpname(name) 38 register char *name; 39 { 40 register char *s; 41 42 /* 43 * Since some UNIX systems do not honor the set-user-id bit 44 * when the invoking user is root, we must change the uid here. 45 * So uucp files are created with the correct owner. 46 */ 47 if (geteuid() == 0 && getuid() == 0) { 48 struct stat stbuf; 49 stbuf.st_uid = 0; /* In case the stat fails */ 50 stbuf.st_gid = 0; 51 stat(UUCICO, &stbuf); /* Assume uucico is correctly owned */ 52 setgid(stbuf.st_gid); 53 setuid(stbuf.st_uid); 54 } 55 56 s = NULL; /* system name unknown, so far */ 57 58 #ifdef GETHOSTNAME 59 if (s == NULL || *s == '\0') { 60 #ifdef VMS 61 int i = sizeof(Myfullname); 62 #endif VMS 63 64 s = Myfullname; 65 #ifdef VMS 66 if(gethostname(Myfullname, &i) == -1) { 67 #else !VMS 68 if(gethostname(Myfullname, sizeof(Myfullname)) == -1) { 69 #endif !VMS 70 DEBUG(1, "gethostname", _FAILED); 71 s = NULL; 72 } 73 } 74 #endif GETHOSTNAME 75 76 #ifdef UNAME 77 /* Use USG library routine */ 78 if (s == NULL || *s == '\0') { 79 struct utsname utsn; 80 81 if (uname(&utsn) == -1) { 82 DEBUG(1, "uname", _FAILED); 83 s = NULL; 84 } else { 85 strncpy(Myfullname, utsn.nodename, sizeof Myfullname); 86 s = Myfullname; 87 } 88 } 89 #endif 90 91 #ifdef WHOAMI 92 /* Use fake gethostname() routine */ 93 if (s == NULL || *s == '\0') { 94 95 s = Myfullname; 96 if (fakegethostname(Myfullname, sizeof(Myfullname)) == -1) { 97 DEBUG(1, "whoami search", _FAILED); 98 s = NULL; 99 } 100 } 101 #endif 102 103 #ifdef CCWHOAMI 104 /* compile sysname right into uucp */ 105 if (s == NULL || *s == '\0') { 106 s = sysname; 107 strncpy(Myfullname, s, sizeof Myfullname); 108 } 109 #endif 110 111 #ifdef UUNAME 112 /* uucp name is stored in /etc/uucpname or /local/uucpname */ 113 if (s == NULL || *s == '\0') { 114 FILE *uucpf; 115 116 s = Myfullname; 117 if (((uucpf = fopen("/etc/uucpname", "r")) == NULL && 118 (uucpf = fopen("/local/uucpname", "r")) == NULL) || 119 fgets(Myfullname, sizeof Myfullname, uucpf) == NULL) { 120 DEBUG(1, "uuname search", _FAILED); 121 s = NULL; 122 } 123 if (s == Myfullname) { 124 register char *p; 125 p = index(s, '\n'); 126 if (p) 127 *p = '\0'; 128 } 129 if (uucpf != NULL) 130 fclose(uucpf); 131 } 132 #endif 133 134 #ifdef GETMYHNAME 135 /* Use 3Com's getmyhname() routine */ 136 if (s == NULL || *s == '\0') { 137 if ((s = getmyhname()) == NULL) 138 DEBUG(1, "getmyhname", _FAILED); 139 else 140 strncpy(Myfullname, s, sizeof Myfullname); 141 } 142 #endif 143 144 #ifdef MYNAME 145 if (s == NULL || *s == '\0') { 146 s = MYNAME; 147 strncpy(Myfullname, s, sizeof Myfullname); 148 } 149 #endif 150 151 if (s == NULL || *s == '\0') { 152 /* 153 * As a last ditch thing, we *could* search Spool 154 * for D.<uucpname> and use that, 155 * but that is too much trouble, isn't it? 156 */ 157 logent("SYSTEM NAME", "CANNOT DETERMINE"); 158 strcpy(Myfullname, "unknown"); 159 } 160 161 /* 162 * copy uucpname back to caller-supplied buffer, 163 * truncating to MAXBASENAME characters. 164 * Also set up subdirectory names 165 * Truncate names at '.' if found to handle cases like 166 * seismo.css.gov being returned by gethostname(). 167 * uucp sites should not have '.' in their name anyway 168 */ 169 s = index(Myfullname, '.'); 170 if (s != NULL) 171 *s = '\0'; 172 strncpy(name, Myfullname, MAXBASENAME); 173 name[MAXBASENAME] = '\0'; 174 DEBUG(1, "My uucpname = %s\n", name); 175 176 sprintf(DLocal, "D.%.*s", SYSNSIZE, name); 177 sprintf(DLocalX, "D.%.*sX", SYSNSIZE, name); 178 } 179 180 #ifdef WHOAMI 181 /* 182 * simulate the 4.2 bsd system call by reading /usr/include/whoami.h 183 * and looking for the #define sysname 184 */ 185 186 #define HDRFILE "/usr/include/whoami.h" 187 188 fakegethostname(name, len) 189 char *name; 190 int len; 191 { 192 char buf[BUFSIZ]; 193 char bname[32]; 194 char hname[32]; 195 char nname[128]; 196 register char *p, *q, *nptr; 197 int i; 198 register FILE *fd; 199 200 fd = fopen(HDRFILE, "r"); 201 if (fd == NULL) 202 return(-1); 203 204 hname[0] = 0; 205 nname[0] = 0; 206 nptr = nname; 207 208 while (fgets(buf, sizeof buf, fd) != NULL) { /* each line in the file */ 209 if (sscanf(buf, "#define sysname \"%[^\"]\"", bname) == 1) { 210 strcpy(hname, bname); 211 } else if (sscanf(buf, "#define nickname \"%[^\"]\"", bname) == 1) { 212 strcpy(nptr, bname); 213 nptr += strlen(bname) + 1; 214 } else if (sscanf(buf, "#define nickname%d \"%[^\"]\"", &i, bname) == 2) { 215 strcpy(nptr, bname); 216 nptr += strlen(bname) + 1; 217 } 218 } 219 fclose(fd); 220 if (hname[0] == 0) 221 return FAIL; 222 strncpy(name, hname, len); 223 p = nname; 224 i = strlen(hname) + 1; 225 q = name + i; 226 while (i < len && (p[0] != 0 || p[1] != 0)) { 227 *q++ = *p++; 228 i++; 229 } 230 *q++ = 0; 231 return SUCCESS; 232 } 233 #endif 234