1 | /* |
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2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
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3 | * unrestricted use provided that this legend is included on all tape |
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4 | * media and as a part of the software program in whole or part. Users |
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5 | * may copy or modify Sun RPC without charge, but are not authorized |
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6 | * to license or distribute it to anyone else except as part of a product or |
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7 | * program developed by the user or with the express written consent of |
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8 | * Sun Microsystems, Inc. |
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9 | * |
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10 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
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11 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
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12 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
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13 | * |
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14 | * Sun RPC is provided with no support and without any obligation on the |
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15 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
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16 | * modification or enhancement. |
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17 | * |
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18 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
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19 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
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20 | * OR ANY PART THEREOF. |
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21 | * |
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22 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
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23 | * or profits or other special, indirect and consequential damages, even if |
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24 | * Sun has been advised of the possibility of such damages. |
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25 | * |
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26 | * Sun Microsystems, Inc. |
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27 | * 2550 Garcia Avenue |
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28 | * Mountain View, California 94043 |
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29 | */ |
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30 | #if !defined(lint) && defined(SCCSIDS) |
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31 | static char sccsid[] = "@(#)netnamer.c 1.13 91/03/11 Copyr 1986 Sun Micro"; |
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32 | #endif |
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33 | /* |
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34 | * netname utility routines convert from unix names to network names and |
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35 | * vice-versa This module is operating system dependent! What we define here |
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36 | * will work with any unix system that has adopted the sun NIS domain |
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37 | * architecture. |
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38 | */ |
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39 | #include <sys/param.h> |
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40 | #include <rpc/rpc.h> |
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41 | #include <rpc/rpc_com.h> |
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42 | #ifdef YP |
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43 | #include <rpcsvc/yp_prot.h> |
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44 | #include <rpcsvc/ypclnt.h> |
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45 | #endif |
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46 | #include <ctype.h> |
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47 | #include <stdio.h> |
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48 | #include <grp.h> |
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49 | #include <pwd.h> |
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50 | #include <string.h> |
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51 | #include <stdlib.h> |
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52 | #include <unistd.h> |
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53 | |
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54 | static char *OPSYS = "unix"; |
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55 | #ifdef YP |
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56 | static char *NETID = "netid.byname"; |
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57 | #endif |
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58 | static char *NETIDFILE = "/etc/netid"; |
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59 | |
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60 | static int getnetid __P(( char *, char * )); |
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61 | static int _getgroups __P(( char *, gid_t * )); |
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62 | |
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63 | #ifndef NGROUPS |
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64 | #define NGROUPS 16 |
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65 | #endif |
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66 | |
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67 | /* |
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68 | * Convert network-name into unix credential |
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69 | */ |
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70 | int |
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71 | netname2user(netname, uidp, gidp, gidlenp, gidlist) |
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72 | char netname[MAXNETNAMELEN + 1]; |
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73 | uid_t *uidp; |
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74 | gid_t *gidp; |
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75 | int *gidlenp; |
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76 | gid_t *gidlist; |
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77 | { |
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78 | char *p; |
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79 | int gidlen; |
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80 | uid_t uid; |
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81 | long luid; |
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82 | struct passwd *pwd; |
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83 | char val[1024]; |
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84 | char *val1, *val2; |
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85 | char *domain; |
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86 | int vallen; |
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87 | int err; |
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88 | |
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89 | if (getnetid(netname, val)) { |
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90 | p = strtok(val, ":"); |
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91 | if (p == NULL) |
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92 | return (0); |
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93 | *uidp = (uid_t) atol(val); |
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94 | p = strtok(NULL, "\n,"); |
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95 | *gidp = (gid_t) atol(p); |
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96 | if (p == NULL) { |
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97 | return (0); |
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98 | } |
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99 | gidlen = 0; |
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100 | for (gidlen = 0; gidlen < NGROUPS; gidlen++) { |
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101 | p = strtok(NULL, "\n,"); |
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102 | if (p == NULL) |
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103 | break; |
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104 | gidlist[gidlen] = (gid_t) atol(p); |
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105 | } |
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106 | *gidlenp = gidlen; |
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107 | |
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108 | return (1); |
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109 | } |
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110 | val1 = strchr(netname, '.'); |
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111 | if (val1 == NULL) |
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112 | return (0); |
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113 | if (strncmp(netname, OPSYS, (val1-netname))) |
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114 | return (0); |
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115 | val1++; |
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116 | val2 = strchr(val1, '@'); |
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117 | if (val2 == NULL) |
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118 | return (0); |
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119 | vallen = val2 - val1; |
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120 | if (vallen > (1024 - 1)) |
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121 | vallen = 1024 - 1; |
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122 | (void) strncpy(val, val1, 1024); |
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123 | val[vallen] = 0; |
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124 | |
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125 | err = _rpc_get_default_domain(&domain); /* change to rpc */ |
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126 | if (err) |
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127 | return (0); |
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128 | |
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129 | if (strcmp(val2 + 1, domain)) |
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130 | return (0); /* wrong domain */ |
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131 | |
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132 | if (sscanf(val, "%ld", &luid) != 1) |
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133 | return (0); |
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134 | uid = luid; |
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135 | |
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136 | /* use initgroups method */ |
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137 | pwd = getpwuid(uid); |
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138 | if (pwd == NULL) |
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139 | return (0); |
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140 | *uidp = pwd->pw_uid; |
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141 | *gidp = pwd->pw_gid; |
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142 | *gidlenp = _getgroups(pwd->pw_name, gidlist); |
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143 | return (1); |
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144 | } |
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145 | |
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146 | /* |
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147 | * initgroups |
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148 | */ |
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149 | |
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150 | static int |
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151 | _getgroups(uname, groups) |
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152 | char *uname; |
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153 | gid_t groups[NGROUPS]; |
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154 | { |
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155 | gid_t ngroups = 0; |
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156 | register struct group *grp; |
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157 | register int i; |
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158 | register int j; |
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159 | int filter; |
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160 | |
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161 | setgrent(); |
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162 | while ((grp = getgrent())) { |
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163 | for (i = 0; grp->gr_mem[i]; i++) |
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164 | if (!strcmp(grp->gr_mem[i], uname)) { |
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165 | if (ngroups == NGROUPS) { |
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166 | #ifdef DEBUG |
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167 | fprintf(stderr, |
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168 | "initgroups: %s is in too many groups\n", uname); |
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169 | #endif |
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170 | goto toomany; |
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171 | } |
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172 | /* filter out duplicate group entries */ |
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173 | filter = 0; |
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174 | for (j = 0; j < ngroups; j++) |
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175 | if (groups[j] == grp->gr_gid) { |
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176 | filter++; |
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177 | break; |
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178 | } |
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179 | if (!filter) |
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180 | groups[ngroups++] = grp->gr_gid; |
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181 | } |
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182 | } |
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183 | toomany: |
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184 | endgrent(); |
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185 | return (ngroups); |
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186 | } |
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187 | |
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188 | /* |
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189 | * Convert network-name to hostname |
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190 | */ |
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191 | int |
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192 | netname2host(netname, hostname, hostlen) |
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193 | char netname[MAXNETNAMELEN + 1]; |
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194 | char *hostname; |
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195 | int hostlen; |
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196 | { |
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197 | int err; |
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198 | char valbuf[1024]; |
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199 | char *val; |
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200 | char *val2; |
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201 | int vallen; |
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202 | char *domain; |
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203 | |
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204 | if (getnetid(netname, valbuf)) { |
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205 | val = valbuf; |
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206 | if ((*val == '0') && (val[1] == ':')) { |
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207 | (void) strncpy(hostname, val + 2, hostlen); |
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208 | return (1); |
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209 | } |
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210 | } |
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211 | val = strchr(netname, '.'); |
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212 | if (val == NULL) |
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213 | return (0); |
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214 | if (strncmp(netname, OPSYS, (val - netname))) |
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215 | return (0); |
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216 | val++; |
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217 | val2 = strchr(val, '@'); |
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218 | if (val2 == NULL) |
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219 | return (0); |
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220 | vallen = val2 - val; |
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221 | if (vallen > (hostlen - 1)) |
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222 | vallen = hostlen - 1; |
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223 | (void) strncpy(hostname, val, vallen); |
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224 | hostname[vallen] = 0; |
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225 | |
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226 | err = _rpc_get_default_domain(&domain); /* change to rpc */ |
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227 | if (err) |
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228 | return (0); |
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229 | |
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230 | if (strcmp(val2 + 1, domain)) |
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231 | return (0); /* wrong domain */ |
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232 | else |
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233 | return (1); |
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234 | } |
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235 | |
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236 | /* |
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237 | * reads the file /etc/netid looking for a + to optionally go to the |
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238 | * network information service. |
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239 | */ |
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240 | int |
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241 | getnetid(key, ret) |
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242 | char *key, *ret; |
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243 | { |
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244 | char buf[1024]; /* big enough */ |
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245 | char *res; |
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246 | char *mkey; |
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247 | char *mval; |
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248 | FILE *fd; |
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249 | #ifdef YP |
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250 | char *domain; |
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251 | int err; |
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252 | char *lookup; |
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253 | int len; |
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254 | #endif |
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255 | |
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256 | fd = fopen(NETIDFILE, "r"); |
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257 | if (fd == (FILE *) 0) { |
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258 | #ifdef YP |
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259 | res = "+"; |
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260 | goto getnetidyp; |
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261 | #else |
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262 | return (0); |
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263 | #endif |
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264 | } |
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265 | for (;;) { |
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266 | if (fd == (FILE *) 0) |
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267 | return (0); /* getnetidyp brings us here */ |
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268 | res = fgets(buf, 1024, fd); |
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269 | if (res == 0) { |
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270 | fclose(fd); |
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271 | return (0); |
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272 | } |
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273 | if (res[0] == '#') |
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274 | continue; |
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275 | else if (res[0] == '+') { |
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276 | #ifdef YP |
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277 | getnetidyp: |
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278 | err = yp_get_default_domain(&domain); |
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279 | if (err) { |
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280 | continue; |
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281 | } |
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282 | lookup = NULL; |
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283 | err = yp_match(domain, NETID, key, |
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284 | strlen(key), &lookup, &len); |
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285 | if (err) { |
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286 | #ifdef DEBUG |
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287 | fprintf(stderr, "match failed error %d\n", err); |
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288 | #endif |
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289 | continue; |
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290 | } |
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291 | lookup[len] = 0; |
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292 | strcpy(ret, lookup); |
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293 | free(lookup); |
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294 | if (fd != NULL) |
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295 | fclose(fd); |
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296 | return (2); |
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297 | #else /* YP */ |
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298 | #ifdef DEBUG |
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299 | fprintf(stderr, |
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300 | "Bad record in %s '+' -- NIS not supported in this library copy\n", |
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301 | NETIDFILE); |
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302 | #endif |
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303 | continue; |
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304 | #endif /* YP */ |
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305 | } else { |
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306 | mkey = strtok(buf, "\t "); |
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307 | if (mkey == NULL) { |
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308 | fprintf(stderr, |
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309 | "Bad record in %s -- %s", NETIDFILE, buf); |
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310 | continue; |
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311 | } |
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312 | mval = strtok(NULL, " \t#\n"); |
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313 | if (mval == NULL) { |
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314 | fprintf(stderr, |
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315 | "Bad record in %s val problem - %s", NETIDFILE, buf); |
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316 | continue; |
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317 | } |
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318 | if (strcmp(mkey, key) == 0) { |
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319 | strcpy(ret, mval); |
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320 | fclose(fd); |
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321 | return (1); |
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322 | |
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323 | } |
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324 | } |
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325 | } |
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326 | } |
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