Manpage of GETPW

GETPW

Section: Linux Programmer's Manual (3)
Updated: 2015-07-23
Index
 

NAME

getpw - reconstruct password line entry  

SYNOPSIS

#define _GNU_SOURCE             /* See feature_test_macros(7) */
#include <sys/types.h>#include <pwd.h>int getpw(uid_t 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 <pwd.h> 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;      /* user information */
    char   *pw_dir;        /* home directory */
    char   *pw_shell;      /* 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 errnois set to indicate the error.

If uidis not found in the password database, getpw() returns -1, sets errnoto 0, and leaves bufunchanged.  

ERRORS

0 or ENOENT
No user corresponding to uid.
EINVAL
bufis NULL.
ENOMEM
Insufficient memory to allocate passwdstructure.
 

FILES

/etc/passwd
password database file
 

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
getpw() Thread safetyMT-Safe locale

 

CONFORMING TO

SVr2.  

BUGS

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

SEE ALSO

endpwent(3), fgetpwent(3), getpwent(3), getpwnam(3), getpwuid(3), putpwent(3), setpwent(3), passwd(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
FILES
ATTRIBUTES
CONFORMING TO
BUGS
SEE ALSO

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Time: 22:28:00 GMT, June 20, 2016