fgetpwent(3)

1fgetpwent(3)               Library Functions Manual               fgetpwent(3)
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NAME

6       fgetpwent - get password file entry
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LIBRARY

9       Standard C library (libc, -lc)
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SYNOPSIS

12       #include <stdio.h>
13       #include <sys/types.h>
14       #include <pwd.h>
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16       struct passwd *fgetpwent(FILE *stream);
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18   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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20       fgetpwent():
21           Since glibc 2.19:
22               _DEFAULT_SOURCE
23           glibc 2.19 and earlier:
24               _SVID_SOURCE
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DESCRIPTION

27       The  fgetpwent()  function  returns a pointer to a structure containing
28       the broken out fields of a line in the file stream.  The first time  it
29       is called it returns the first entry; thereafter, it returns successive
30       entries.  The file referred to by stream must have the same  format  as
31       /etc/passwd (see passwd(5)).
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33       The passwd structure is defined in <pwd.h> as follows:
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35           struct passwd {
36               char   *pw_name;       /* username */
37               char   *pw_passwd;     /* user password */
38               uid_t   pw_uid;        /* user ID */
39               gid_t   pw_gid;        /* group ID */
40               char   *pw_gecos;      /* real name */
41               char   *pw_dir;        /* home directory */
42               char   *pw_shell;      /* shell program */
43           };
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RETURN VALUE

46       The  fgetpwent()  function  returns a pointer to a passwd structure, or
47       NULL if there are no more entries or an error occurs.  In the event  of
48       an error, errno is set to indicate the error.
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ERRORS

51       ENOMEM Insufficient memory to allocate passwd structure.
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FILES

54       /etc/passwd
55              password database file
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ATTRIBUTES

58       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
59       tributes(7).
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61       ┌───────────────────────────┬───────────────┬──────────────────────────┐
62       │Interface                  │ Attribute     │ Value                    │
63       ├───────────────────────────┼───────────────┼──────────────────────────┤
64       │fgetpwent()                │ Thread safety │ MT-Unsafe race:fgetpwent │
65       └───────────────────────────┴───────────────┴──────────────────────────┘
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STANDARDS

68       None.
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HISTORY

71       SVr4.
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