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

NAME
       getpw - reconstruct password line entry

SYNOPSIS
       #define GNUSOURCE             /* See featuretestmacros(7) */
       #include 
       #include 

       int getpw(uidt uid, char *buf);

DESCRIPTION
       The getpw() function reconstructs 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  as follows:

           struct passwd {
               char   *pwname;       /* username */
               char   *pwpasswd;     /* user password */
               uidt   pwuid;        /* user ID */
               gidt   pwgid;        /* group ID */
               char   *pwgecos;      /* user information */
               char   *pwdir;        /* home directory */
               char   *pwshell;      /* shell program */
           };

       For more information about the fields of this structure, see passwd(5).

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 3.53 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                               2010-10-21                          GETPW(3)