1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
3 .\" Permission is granted to make and distribute verbatim copies of this
4 .\" manual provided the copyright notice and this permission notice are
5 .\" preserved on all copies.
7 .\" Permission is granted to copy and distribute modified versions of this
8 .\" manual under the conditions for verbatim copying, provided that the
9 .\" entire resulting derived work is distributed under the terms of a
10 .\" permission notice identical to this one.
12 .\" Since the Linux kernel and libraries are constantly changing, this
13 .\" manual page may be incorrect or out-of-date. The author(s) assume no
14 .\" responsibility for errors or omissions, or for damages resulting from
15 .\" the use of the information contained herein. The author(s) may not
16 .\" have taken the same level of care in the production of this manual,
17 .\" which is licensed free of charge, as they might when working
20 .\" Formatted or processed versions of this manual, if unaccompanied by
21 .\" the source, must acknowledge the copyright and authors of this work.
23 .\" References consulted:
24 .\" Linux libc source code
25 .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
27 .\" Modified Sat Jul 24 19:29:54 1993 by Rik Faith (faith@cs.unc.edu)
29 .\" Japanese Version Copyright (c) 1997 HIROFUMI Nishizuka
30 .\" all rights reserved.
31 .\" Translated 1997-12-19, HIROFUMI Nishizuka <nishi@rpts.cl.nec.co.jp>
32 .\" Updated & Modified 2004-05-30, Yuichi SATO <ysato444@yahoo.co.jp>
33 .\" Updated & Modified 2005-09-06, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
35 .TH GETGRENT 3 2010-10-21 "" "Linux Programmer's Manual"
38 .\"O getgrent, setgrent, endgrent \- get group file entry
39 getgrent, setgrent, endgrent \- ¥°¥ë¡¼¥×¥Õ¥¡¥¤¥ë¥¨¥ó¥È¥ê¤Î¼èÆÀ
43 .B #include <sys/types.h>
46 .B struct group *getgrent(void);
48 .B void setgrent(void);
50 .B void endgrent(void);
54 .\"O Feature Test Macro Requirements for glibc (see
55 .\"O .BR feature_test_macros (7)):
56 glibc ¸þ¤±¤Îµ¡Ç½¸¡ºº¥Þ¥¯¥í¤ÎÍ×·ï
57 .RB ( feature_test_macros (7)
65 _SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE\ >=\ 500 ||
66 _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED ||
68 /* Since glibc 2.12: */ _POSIX_C_SOURCE\ >=\ 200809L
74 _SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE\ >=\ 500 ||
75 _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED
83 .\"O function returns a pointer to a structure containing
84 .\"O the broken-out fields of a record in the group database
85 .\"O (e.g., the local group file
91 .\"O it returns the first entry; thereafter, it returns successive entries.
93 ´Ø¿ô¤Ï¡¢¥°¥ë¡¼¥×¡¦¥Ç¡¼¥¿¥Ù¡¼¥¹¤«¤é¼èÆÀ¤·¤¿¥¨¥ó¥È¥ê¤ò
94 Í×ÁÇËè¤Ëʬ²ò¤·¡¢³ÆÍ×ÁǤò³ÊǼ¤·¤¿¹½Â¤ÂΤؤΥݥ¤¥ó¥¿¤òÊÖ¤¹
95 (¥°¥ë¡¼¥×¡¦¥Ç¡¼¥¿¥Ù¡¼¥¹¤ÎÎã:
96 ¥í¡¼¥«¥ë¤Î¥°¥ë¡¼¥×¥Õ¥¡¥¤¥ë
100 ¤Ï¡¢ºÇ½é¤Ë¸Æ¤Ó½Ð¤µ¤ì¤¿»þ¤ÏºÇ½é¤Î¥¨¥ó¥È¥ê¤òÊÖ¤·¡¢
101 ¤½¤ì°Ê¹ß¤Ï¸Æ¤Ó½Ð¤µ¤ì¤ëËè¤Ë¼¡¤Î¥¨¥ó¥È¥ê¤òÊÖ¤¹¡£
105 .\"O function rewinds to the beginning
106 .\"O of the group database, to allow repeated scans.
108 ´Ø¿ô¤ò»È¤¦¤È¡¢¤â¤¦°ìÅÙÆɤ߹þ¤á¤ë¤è¤¦¤Ë¡¢
109 ¥°¥ë¡¼¥×¡¦¥Ç¡¼¥¿¥Ù¡¼¥¹¤ÎÀèƬ¤ËÌá¤ë¡£
113 .\"O function is used to close the group database
114 .\"O after all processing has been performed.
116 ´Ø¿ô¤Ï¡¢Á´¤Æ¤Î½èÍý¤¬½ª¤ï¤Ã¤¿¸å¤Ë¥°¥ë¡¼¥×¡¦
117 ¥Ç¡¼¥¿¥Ù¡¼¥¹¤ò¥¯¥í¡¼¥º¤¹¤ë¡£
119 .\"O The \fIgroup\fP structure is defined in \fI<grp.h>\fP as follows:
120 \fIgroup\fP ¹½Â¤ÂΤϡ¢\fI<grp.h>\fP ¤Ç°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤ë:
125 .\"O char *gr_name; /* group name */
126 .\"O char *gr_passwd; /* group password */
127 .\"O gid_t gr_gid; /* group ID */
128 .\"O char **gr_mem; /* group members */
129 char *gr_name; /* ¥°¥ë¡¼¥×̾ */
130 char *gr_passwd; /* ¥°¥ë¡¼¥×¤Î¥Ñ¥¹¥ï¡¼¥É */
131 gid_t gr_gid; /* ¥°¥ë¡¼¥× ID */
132 char **gr_mem; /* ¥°¥ë¡¼¥×¤Î¥á¥ó¥Ð */
137 .\"O For more information about the fields of this structure, see
139 ¤³¤Î¹½Â¤ÂΤΥե£¡¼¥ë¥É¤Î¾ÜºÙ¤Ï
142 .\"O .SH "RETURN VALUE"
146 .\"O function returns a pointer to a
149 .\"O or NULL if there are no more entries or an error occurs.
153 ¹½Â¤ÂΤؤΥݥ¤¥ó¥¿¤òÊÖ¤¹¡£
154 ¤³¤ì°Ê¾å¥¨¥ó¥È¥ê¤¬Ìµ¤¤¤«¡¢¥¨¥é¡¼¤¬È¯À¸¤·¤¿¾ì¹ç¤Ï NULL ¤òÊÖ¤¹¡£
159 .\"O If one wants to check
161 .\"O after the call, it should be set to zero before the call.
165 ¤³¤Î´Ø¿ô¤Î¸Æ¤Ó½Ð¤·¸å¤Ë
167 ¤ò¥Á¥§¥Ã¥¯¤·¤¿¤¤¾ì¹ç¤Ï¡¢¸Æ¤Ó½Ð¤·Á°¤Ë
169 ¤ò 0 ¤ËÀßÄꤷ¤Æ¤ª¤«¤Ê¤¤¤È¤¤¤±¤Ê¤¤¡£
171 .\"O The return value may point to a static area, and may be overwritten
172 .\"O by subsequent calls to
173 .\"O .BR getgrent (),
174 .\"O .BR getgrgid (3),
176 .\"O .BR getgrnam (3).
177 .\"O (Do not pass the returned pointer to
179 ÊÖ¤êÃͤÏÀÅŪ¤ÊÎΰè¤ò»Ø¤·¤Æ¤ª¤ê¡¢¤½¤Î¸å¤Î
183 ¤Î¸Æ¤Ó½Ð¤·¤Ç¾å½ñ¤¤µ¤ì¤ë¤«¤â¤·¤ì¤Ê¤¤¡£
191 .\"O A signal was caught.
192 ¥·¥°¥Ê¥ë¤¬¥¥ã¥Ã¥Á¤µ¤ì¤¿¡£
199 .\"O The calling process already has too many open files.
200 ¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤¬´û¤Ë¥Õ¥¡¥¤¥ë¤ò¥ª¡¼¥×¥ó¤·²á¤®¤Æ¤¤¤ë¡£
203 .\"O Too many open files in the system.
204 ¥·¥¹¥Æ¥à¾å¤Ë¥ª¡¼¥×¥ó¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¤¬Â¿²á¤®¤ë¡£
207 .\"O .\" not in POSIX
208 .\"O Insufficient memory to allocate
213 ¹½Â¤ÂΤò³ä¤êÅö¤Æ¤ë¤¿¤á¤Î¥á¥â¥ê¤¬ÉÔ½½Ê¬¡£
216 .\"O Insufficient buffer space supplied.
217 ½½Ê¬¤Ê¥Ð¥Ã¥Õ¥¡¶õ´Ö¤¬¤Ê¤¤¡£
221 .\"O local group database file
222 ¥í¡¼¥«¥ë¤Î¥°¥ë¡¼¥×¡¦¥Ç¡¼¥¿¥Ù¡¼¥¹¥Õ¥¡¥¤¥ë
223 .\"O .SH "CONFORMING TO"
225 SVr4, 4.3BSD, POSIX.1-2001.
232 .BR getgrouplist (3),