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getpwent(3)							   getpwent(3)

Name
       getpwent, getpwuid, getpwnam, setpwent, endpwent, setpwfile - get pass‐
       word entry

Syntax
       #include <pwd.h>

       struct passwd *getpwent()

       struct passwd *getpwuid(uid)
       uid_t uid;

       struct passwd *getpwnam(name)
       char *name;

       void setpwent()

       void endpwent()

       void setpwfile(pathname)
       char *pathname

Description
       The routines, and each return a pointer to an object with the following
       structure  containing  the  broken-out fields of a line in the password
       database:
       struct  passwd { /* see getpwent(3) */
	       char    *pw_name;
	       char    *pw_passwd;
	       uid_t	pw_uid;
	       gid_t	pw_gid;
	       int	pw_quota;
	       char    *pw_comment;
	       char    *pw_gecos;
	       char    *pw_dir;
	       char    *pw_shell;
       };

       struct passwd *getpwent(), *getpwuid(), *getpwnam();

       The fields pw_quota and pw_comment are unused; the others have meanings
       described in

       A  call	to  has	 the  effect  of  rewinding the password file to allow
       repeated searches.  may be called to close the password	database  when
       processing is complete.

       The subroutine simply retrieves the next entry while and search until a
       matching uid or name is found (or until	all  entries  are  exhausted).
       The  subroutine	keeps  a  pointer in the database, allowing successive
       calls to be used to search the entire database.

       A call to must be made before a loop using in order to perform initial‐
       ization and an must be used after the loop.  Both and make calls to and

       The  subroutine sets the pathname of the ASCII passwd file and optional
       hashed database to be used for local passwd lookups.  If a passwd  file
       has  been  left	open  by  a  call to or will close it first.  does not
       directly affect the use of distributed passwd databases.

Restrictions
       All information is contained in a static area so it must be  copied  if
       it is to be saved.

       If  YP is running, does not return the entries in any particular order.
       See the Guide to the Yellow Pages Service for setup information.

       The password database may also be distributed via the BIND/Hesiod  nam‐
       ing  service.  See the Guide to the BIND/Hesiod Service for more infor‐
       mation.

Return Values
       Null pointer (0) returned on EOF or error.

Files
See Also
       getlogin(3), passwd(5), svc.conf(5)
       Guide to the BIND/Hesiod Service
       Guide to the Yellow Pages Service

								   getpwent(3)
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