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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | FILES | ATTRIBUTES | STANDARDS | HISTORY | BUGS | SEE ALSO | COLOPHON |
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getpw(3) Library Functions Manual getpw(3)
getpw - reconstruct password line entry
Standard C library (libc, -lc)
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <sys/types.h>
#include <pwd.h>
[[deprecated]] int getpw(uid_t uid, char *buf);
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).
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.
0 or ENOENT
No user corresponding to uid.
EINVAL buf is NULL.
ENOMEM Insufficient memory to allocate passwd structure.
/etc/passwd
password database file
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────────────────────┬───────────────┬────────────────┐
│ Interface │ Attribute │ Value │
├───────────────────────────────┼───────────────┼────────────────┤
│ getpw() │ Thread safety │ MT-Safe locale │
└───────────────────────────────┴───────────────┴────────────────┘
None.
SVr2.
The getpw() function is dangerous as it may overflow the provided
buffer buf. It is obsoleted by getpwuid(3).
endpwent(3), fgetpwent(3), getpwent(3), getpwnam(3), getpwuid(3),
putpwent(3), setpwent(3), passwd(5)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.10.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-02-02. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.10 2024-07-23 getpw(3)
Pages that refer to this page: fgetpwent(3), getpwent(3), getpwent_r(3), getpwnam(3), putpwent(3)
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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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