/etc/passwd
password database file
getpw3
Reconstruct password line entry
Usage
#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <sys/types.h> #include <pwd.h>
[[deprecated]] int getpw(uid_t uid, char *buf);
Library
Standard C library (libc, -lc)
Overview
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
|
No user corresponding to uid. |
|---|---|
EINVAL
|
buf is NULL. |
ENOMEM
|
Insufficient memory to allocate passwd structure. |
Files
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| getpw() | Thread safety | MT-Safe locale |
Releases
19 releases since Debian 1.1 (Buzz); the text changed 15 times.