Man page - getpw(3)

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Manual

getpw

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
FILES
ATTRIBUTES
STANDARDS
HISTORY
BUGS
SEE ALSO

NAME

getpw - reconstruct password line entry

LIBRARY

Standard C library ( libc , -lc )

SYNOPSIS

#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <sys/types.h>
#include <pwd.h>

[[deprecated]] 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 errno is set to indicate the error.

If uid is not found in the password database, getpw () returns -1, sets errno to 0, and leaves buf unchanged.

ERRORS

0 or ENOENT

No user corresponding to uid .

	EINVAL		buf is NULL.
	ENOMEM		Insufficient memory to allocate passwd structure.

FILES

/etc/passwd

password database file

ATTRIBUTES

For an explanation of the terms used in this section, see attributes (7).

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STANDARDS

None.

HISTORY

SVr2.

BUGS

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