unixdev.net


Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (Debian-5.0)
Page:
Section:
Apropos / Subsearch:
optional field

GETPW(3)                   Linux Programmer's Manual                  GETPW(3)



NAME
       getpw - Re-construct password line entry

SYNOPSIS
       #define _GNU_SOURCE
       #include <&lt;sys/types.h>&gt;
       #include <&lt;pwd.h>&gt;

       int getpw(uid_t uid, char *buf);

DESCRIPTION
       The  getpw()  function  re-constructs  the  password line entry for the
       given user ID uid in the buffer buf.  The returned  buffer  contains  a
       line of format

              name:passwd:uid:gid:gecos:dir:shell

       The passwd structure is defined in &lt;pwd.h&gt; as follows:

           struct passwd {
               char   *pw_name;       /* username */
               char   *pw_passwd;     /* user password */
               uid_t   pw_uid;        /* user ID */
               gid_t   pw_gid;        /* group ID */
               char   *pw_gecos;      /* real name */
               char   *pw_dir;        /* home directory */
               char   *pw_shell;      /* shell program */
           };

RETURN VALUE
       The getpw() function returns 0 on success; on error, it returns -1, and
       errno is set to indicate the error.

ERRORS
       EINVAL buf is NULL.

       ENOENT No user corresponding to uid.

       ENOMEM Insufficient memory to allocate passwd structure.

FILES
       /etc/passwd
              password database file

CONFORMING TO
       SVr2.

BUGS
       The getpw() function is dangerous as it may overflow the provided  buf-
       fer buf.  It is obsoleted by getpwuid(3).

SEE ALSO
       endpwent(3), fgetpwent(3), getpwent(3), getpwnam(3), getpwuid(3), putp-
       went(3), setpwent(3), passwd(5)

COLOPHON
       This page is part of release 3.05 of the Linux  man-pages  project.   A
       description  of  the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.



GNU                               2007-12-12                          GETPW(3)