fgetgrent - Online Linux Manual PageSection : 3
Updated : 2023-02-05
Source : Linux man-pages 6.03

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NAMEfgetgrent − get group file entry

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LIBRARYStandard C library (libc, −lc)

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SYNOPSIS#include <stdio.h> #include <sys/types.h> #include <grp.h>struct group *fgetgrent(FILE *stream);Feature Test Macro Requirements for glibc (see feature_test_macros(7)): fgetgrent(): Since glibc 2.19: _DEFAULT_SOURCE glibc 2.19 and earlier: _SVID_SOURCE

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DESCRIPTIONThe fgetgrent() function returns a pointer to a structure containing the group information from the file referred to by stream. The first time it is called it returns the first entry; thereafter, it returns successive entries. The file referred to by stream must have the same format as /etc/group (see group(5)). The group structure is defined in <grp.h> as follows: struct group { char *gr_name; /* group name */ char *gr_passwd; /* group password */ gid_t gr_gid; /* group ID */ char **gr_mem; /* NULL−terminated array of pointers to names of group members */ };

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RETURN VALUEThe fgetgrent() function returns a pointer to a group structure, or NULL if there are no more entries or an error occurs. In the event of an error, errno is set to indicate the error.

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ERRORSENOMEM  Insufficient memory to allocate group structure.

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ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue fgetgrent() Thread safetyMT-Unsafe race:fgetgrent

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STANDARDSSVr4.

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SEE ALSOendgrent(3), fgetgrent_r(3), fopen(3), getgrent(3), getgrgid(3), getgrnam(3), putgrent(3), setgrent(3), group(5) 0

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