pwd.h(7POSIX)

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

NAME
pwd.h — password structure

SYNOPSIS

#include <pwd.h>

DESCRIPTION
The <pwd.h> header shall define the struct passwd, structure, which shall include at least the following members:

    char    *pw_name   User's login name.
    uid_t    pw_uid    Numerical user ID.
    gid_t    pw_gid    Numerical group ID.
    char    *pw_dir    Initial working directory.
    char    *pw_shell  Program to use as shell.

The <pwd.h> header shall define the gid_t, uid_t, and size_t types as described in <sys/types.h>.

The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.

    void           endpwent(void);
    struct passwd *getpwent(void);
    struct passwd *getpwnam(const char *);
    int            getpwnam_r(const char *, struct passwd *, char *,
                       size_t, struct passwd **);
    struct passwd *getpwuid(uid_t);
    int            getpwuid_r(uid_t, struct passwd *, char *,
                       size_t, struct passwd **);
    void           setpwent(void);

The following sections are informative.

APPLICATION USAGE
None.

RATIONALE
None.

FUTURE DIRECTIONS
None.

SEE ALSO
<sys_types.h>

The System Interfaces volume of POSIX.1-2017, endpwent(), getpwnam(), getpwuid()

COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version 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 .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .