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Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html. 6 .\" This notice shall appear on any product containing this material. 7 .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). 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If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner] 10 .TH ID 1M "Sep 10, 2013" 11 .SH NAME 12 id \- return user identity 13 .SH SYNOPSIS 14 .LP 15 .nf 16 \fB/usr/bin/id\fR [\fB-p\fR] [\fIuser\fR] 17 .fi 18 19 .LP 20 .nf 21 \fB/usr/bin/id\fR \fB-a\fR [\fB-p\fR] [\fIuser\fR] 22 .fi 23 24 .LP 25 .nf 26 \fB/usr/bin/id\fR \fB-G\fR [\fB-n\fR] [\fIuser\fR] 27 .fi 28 29 .LP 30 .nf 31 \fB/usr/bin/id\fR \fB-g\fR [\fB-nr\fR] [\fIuser\fR] 32 .fi 33 34 .LP 35 .nf 36 \fB/usr/bin/id\fR \fB-u\fR [\fB-nr\fR] [\fIuser\fR] 37 .fi 38 39 .LP 40 .nf 41 \fB/usr/xpg4/bin/id\fR [\fB-p\fR] [\fIuser\fR] 42 .fi 43 44 .LP 45 .nf 46 \fB/usr/xpg4/bin/id\fR \fB-a\fR [\fB-p\fR] [\fIuser\fR] 47 .fi 48 49 .LP 50 .nf 51 \fB/usr/xpg4/bin/id\fR \fB-G\fR [\fB-n\fR] [\fIuser\fR] 52 .fi 53 54 .LP 55 .nf 56 \fB/usr/xpg4/bin/id\fR \fB-g\fR [\fB-nr\fR] [\fIuser\fR] 57 .fi 58 59 .LP 60 .nf 61 \fB/usr/xpg4/bin/id\fR \fB-u\fR [\fB-nr\fR] [\fIuser\fR] 62 .fi 63 64 .SH DESCRIPTION 65 .sp 66 .LP 67 If no \fIuser\fR operand is provided, the \fBid\fR utility writes the user and 68 group \fBID\fRs and the corresponding user and group names of the invoking 69 process to standard output. If the effective and real \fBID\fRs do not match, 70 both are written. If multiple groups are supported by the underlying system, 71 \fB/usr/xpg4/bin/id\fR also writes the supplementary group affiliations of the 72 invoking process. 73 .sp 74 .LP 75 If a \fIuser\fR operand is provided and the process has the appropriate 76 privileges, the user and group \fBID\fRs of the selected user are written. In 77 this case, effective \fBID\fRs are assumed to be identical to real \fBID\fRs. 78 If the selected user has more than one allowable group membership listed in the 79 group database, \fB/usr/xpg4/bin/id\fR writes them in the same manner as the 80 supplementary groups described in the preceding paragraph. 81 .SS "Formats" 82 .sp 83 .LP 84 The following formats are used when the \fBLC_MESSAGES\fR locale category 85 specifies the "C" locale. In other locales, the strings \fBuid\fR, \fBgid\fR, 86 \fBeuid\fR, \fBegid\fR, and \fBgroups\fR may be replaced with more appropriate 87 strings corresponding to the locale. 88 .sp 89 .in +2 90 .nf 91 "uid=%u(%s) gid=%u(%s)\en" <\fIreal user ID\fR>, <\fIuser-name\fR>, 92 <\fIreal group ID\fR>, <\fIgroup-name\fR> 93 .fi 94 .in -2 95 .sp 96 97 .sp 98 .LP 99 If the effective and real user \fBID\fRs do not match, the following are 100 inserted immediately before the \fB\en\fR character in the previous format: 101 .sp 102 .in +2 103 .nf 104 " euid=%u(%s)" 105 .fi 106 .in -2 107 .sp 108 109 .sp 110 .LP 111 with the following arguments added at the end of the argument list: 112 .sp 113 .in +2 114 .nf 115 <\fIeffective user ID\fR>, <\fIeffective user-name\fR> 116 .fi 117 .in -2 118 .sp 119 120 .sp 121 .LP 122 If the effective and real group \fBID\fRs do not match, the following is 123 inserted directly before the \fB\en\fR character in the format string (and 124 after any addition resulting from the effective and real user \fBID\fRs not 125 matching): 126 .sp 127 .in +2 128 .nf 129 " egid=%u(%s)" 130 .fi 131 .in -2 132 .sp 133 134 .sp 135 .LP 136 with the following arguments added at the end of the argument list: 137 .sp 138 .in +2 139 .nf 140 <\fIeffectivegroup-ID\fR>, <\fIeffectivegroupname\fR> 141 .fi 142 .in -2 143 .sp 144 145 .sp 146 .LP 147 If the process has supplementary group affiliations or the selected user is 148 allowed to belong to multiple groups, the first is added directly before the 149 \fBNEWLINE\fR character in the format string: 150 .sp 151 .in +2 152 .nf 153 " groups=%u(%s)" 154 .fi 155 .in -2 156 .sp 157 158 .sp 159 .LP 160 with the following arguments added at the end of the argument list: 161 .sp 162 .in +2 163 .nf 164 <\fIsupplementary group ID\fR>, <\fIsupplementary group name\fR> 165 .fi 166 .in -2 167 .sp 168 169 .sp 170 .LP 171 and the necessary number of the following added after that for any remaining 172 supplementary group \fBID\fRs: 173 .sp 174 .in +2 175 .nf 176 ",%u(%s)" 177 .fi 178 .in -2 179 .sp 180 181 .sp 182 .LP 183 and the necessary number of the following arguments added at the end of the 184 argument list: 185 .sp 186 .in +2 187 .nf 188 <\fIsupplementary group ID\fR>, <\fIsupplementary group name\fR> 189 .fi 190 .in -2 191 .sp 192 193 .sp 194 .LP 195 If any of the user \fBID\fR, group \fBID\fR, effective user \fBID\fR, effective 196 group \fBID\fR or supplementary/multiple group \fBID\fRs cannot be mapped by 197 the system into printable user or group names, the corresponding (\fB%s\fR) and 198 name argument is omitted from the corresponding format string. 199 .sp 200 .LP 201 When any of the options are specified, the output format is as described under 202 OPTIONS. 203 .SH OPTIONS 204 .sp 205 .LP 206 The following options are supported by both \fB/usr/bin/id\fR and 207 \fB/usr/xpg4/bin/id\fR. The \fB-p\fR and \fB-a\fR options are invalid if 208 specified with any of the \fB-G\fR, \fB-g\fR, or \fB-u\fR options. 209 .sp 210 .ne 2 211 .na 212 \fB\fB-p\fR\fR 213 .ad 214 .RS 6n 215 Reports additionally the current project membership of the invoking process. 216 The project is reported using the format: 217 .sp 218 .in +2 219 .nf 220 "projid=%u(%s)" 221 .fi 222 .in -2 223 .sp 224 225 which is inserted prior to the \fB\en\fR character of the default format 226 described in the \fBFormats\fR section. The arguments 227 .sp 228 .in +2 229 .nf 230 <\fIproject ID\fR>,<\fIproject name\fR> 231 .fi 232 .in -2 233 .sp 234 235 are appended to the end of the argument list. If the project \fBID\fR cannot 236 be mapped by the system into a printable project name, the corresponding 237 \fB(%s)\fR and name argument is omitted from the corresponding format string. 238 .RE 239 240 .sp 241 .ne 2 242 .na 243 \fB\fB-a\fR\fR 244 .ad 245 .RS 6n 246 Reports user name, user \fBID\fR and all the groups to which the user belongs. 247 .RE 248 249 .sp 250 .ne 2 251 .na 252 \fB\fB-G\fR\fR 253 .ad 254 .RS 6n 255 Outputs all different group \fBID\fRs (effective, real and supplementary) only, 256 using the format \fB"%u\en"\fR. If there is more than one distinct group 257 affiliation, output each such affiliation, using the format \fB" %u"\fR, before 258 the \fBNEWLINE\fR character is output. 259 .RE 260 261 .sp 262 .ne 2 263 .na 264 \fB\fB-g\fR\fR 265 .ad 266 .RS 6n 267 Outputs only the effective group \fBID\fR, using the format \fB"%u\en"\fR. 268 .RE 269 270 .sp 271 .ne 2 272 .na 273 \fB\fB-n\fR\fR 274 .ad 275 .RS 6n 276 Outputs the name in the format \fB"%s"\fR instead of the numeric \fBID\fR using 277 the format \fB"%u"\fR. 278 .RE 279 280 .sp 281 .ne 2 282 .na 283 \fB\fB-r\fR\fR 284 .ad 285 .RS 6n 286 Outputs the real \fBID\fR instead of the effective \fBID\fR. 287 .RE 288 289 .sp 290 .ne 2 291 .na 292 \fB\fB-u\fR\fR 293 .ad 294 .RS 6n 295 Outputs only the effective user \fBID\fR, using the format \fB"%u\en"\fR. 296 .RE 297 298 .SH OPERANDS 299 .sp 300 .LP 301 The following operand is supported: 302 .sp 303 .ne 2 304 .na 305 \fB\fIuser\fR\fR 306 .ad 307 .RS 8n 308 The user (login) name for which information is to be written. 309 .RE 310 311 .SH ENVIRONMENT VARIABLES 312 .sp 313 .LP 314 See \fBenviron\fR(5) for descriptions of the following environment variables 315 that affect the execution of \fBid\fR: \fBLANG\fR, \fBLC_ALL\fR, 316 \fBLC_CTYPE\fR, \fBLC_MESSAGES\fR, and \fBNLSPATH\fR. 317 .SH EXIT STATUS 318 .sp 319 .LP 320 The following exit values are returned: 321 .sp 322 .ne 2 323 .na 324 \fB\fB0\fR\fR 325 .ad 326 .RS 6n 327 Successful completion. 328 .RE 329 330 .sp 331 .ne 2 332 .na 333 \fB\fB>0\fR\fR 334 .ad 335 .RS 6n 336 An error occurred. 337 .RE 338 339 .SH ATTRIBUTES 340 .sp 341 .LP 342 See \fBattributes\fR(5) for descriptions of the following attributes: 343 .SS "/usr/bin/id" 344 .sp 345 346 .sp 347 .TS 348 box; 349 c | c 350 l | l . 351 ATTRIBUTE TYPE ATTRIBUTE VALUE 352 _ 353 Interface Stability Stable 354 .TE 355 356 .SS "/usr/xpg4/bin/id" 357 .sp 358 359 .sp 360 .TS 361 box; 362 c | c 363 l | l . 364 ATTRIBUTE TYPE ATTRIBUTE VALUE 365 _ 366 Interface Stability Standard 367 .TE 368 369 .SH SEE ALSO 370 .sp 371 .LP 372 \fBfold\fR(1), \fBlogname\fR(1), \fBwho\fR(1), \fBgetgid\fR(2), 373 \fBgetgroups\fR(2), \fBgetprojid\fR(2), \fBgetuid\fR(2), \fBattributes\fR(5), 374 \fBenviron\fR(5), \fBstandards\fR(5) 375 .SH NOTES 376 .sp 377 .LP 378 Output produced by the \fB-G\fR option and by the default case could 379 potentially produce very long lines on systems that support large numbers of 380 supplementary groups.