1grp.h(0P)                  POSIX Programmer's Manual                 grp.h(0P)
2
3
4

PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
10

NAME

12       grp.h — group structure
13

SYNOPSIS

15       #include <grp.h>
16

DESCRIPTION

18       The <grp.h> header shall  declare  the  group  structure,  which  shall
19       include the following members:
20
21
22           char   *gr_name The name of the group.
23           gid_t   gr_gid  Numerical group ID.
24           char  **gr_mem  Pointer to a null-terminated array of character
25                           pointers to member names.
26
27       The <grp.h> header shall define the gid_t and size_t types as described
28       in <sys/types.h>.
29
30       The following shall be declared as functions and may also be defined as
31       macros. Function prototypes shall be provided.
32
33
34           void           endgrent(void);
35           struct group  *getgrent(void);
36           struct group  *getgrgid(gid_t);
37           int            getgrgid_r(gid_t, struct group *, char *,
38                              size_t, struct group **);
39           struct group  *getgrnam(const char *);
40           int            getgrnam_r(const char *, struct group *, char *,
41                              size_t , struct group **);
42           void           setgrent(void);
43
44       The following sections are informative.
45

APPLICATION USAGE

47       None.
48

RATIONALE

50       None.
51

FUTURE DIRECTIONS

53       None.
54

SEE ALSO

56       <sys_types.h>
57
58       The  System  Interfaces volume of POSIX.1‐2017, endgrent(), getgrgid(),
59       getgrnam()
60

62       Portions of this text are reprinted and reproduced in  electronic  form
63       from  IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
64       table Operating System Interface (POSIX), The Open Group Base  Specifi‐
65       cations  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of
66       Electrical and Electronics Engineers, Inc and The Open Group.   In  the
67       event of any discrepancy between this version and the original IEEE and
68       The Open Group Standard, the original IEEE and The Open Group  Standard
69       is  the  referee document. The original Standard can be obtained online
70       at http://www.opengroup.org/unix/online.html .
71
72       Any typographical or formatting errors that appear  in  this  page  are
73       most likely to have been introduced during the conversion of the source
74       files to man page format. To report such errors,  see  https://www.ker‐
75       nel.org/doc/man-pages/reporting_bugs.html .
76
77
78
79IEEE/The Open Group                  2017                            grp.h(0P)
Impressum