NAME
getpw - Re-construct password line entry
SYNOPSIS
#define _GNU_SOURCE
#include <sys/types.h>
#include <pwd.h>
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 <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; /* 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 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)
COLOPHON
This page is part of release 3.23 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/.
