GETPW
Section: Linux Programmer's Manual (3)Updated: 2017-09-15
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NAME
getpw - reconstruct password line entrySYNOPSIS
#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 formatname: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).Interface | Attribute | Value |
getpw() | Thread safety | MT-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)COLOPHON
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Time: 04:45:46 GMT, September 16, 2022
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