mirror of https://github.com/mkerrisk/man-pages
93 lines
2.8 KiB
Groff
93 lines
2.8 KiB
Groff
.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
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.\"
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\"
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.\" References consulted:
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.\" Linux libc source code
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.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
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.\" 386BSD man pages
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.\" Modified Sat Jul 24 19:23:25 1993 by Rik Faith (faith@cs.unc.edu)
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.\" Modified Mon May 27 21:37:47 1996 by Martin Schulze (joey@linux.de)
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.\"
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.TH GETPW 3 1996-05-27 "GNU" "Linux Programmer's Manual"
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.SH NAME
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getpw \- Re-construct password line entry
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.SH SYNOPSIS
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.nf
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.B #include <sys/types.h>
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.B #include <pwd.h>
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.sp
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.BI "int getpw(uid_t " uid ", char *" buf );
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.fi
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.SH DESCRIPTION
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The \fBgetpw\fP() function re-constructs the password line entry for
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the given user ID \fIuid\fP in the buffer \fIbuf\fP.
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The returned buffer contains a line of format
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.sp
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.RS
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.B name:passwd:uid:gid:gecos:dir:shell
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.RE
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.PP
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The \fIpasswd\fP structure is defined in \fI<pwd.h>\fP as follows:
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.sp
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.RS
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.nf
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struct passwd {
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char *pw_name; /* user name */
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char *pw_passwd; /* user password */
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uid_t pw_uid; /* user ID */
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gid_t pw_gid; /* group ID */
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char *pw_gecos; /* real name */
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char *pw_dir; /* home directory */
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char *pw_shell; /* shell program */
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};
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.fi
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.RE
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.SH "RETURN VALUE"
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The \fBgetpw\fP() function returns 0 on success, or \-1 if an error
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occurs.
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.SH ERRORS
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.TP
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.B ENOMEM
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Insufficient memory to allocate passwd structure.
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.SH FILES
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.TP
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.I /etc/passwd
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password database file
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.SH "CONFORMING TO"
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SVr2.
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.SH BUGS
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The
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.BR getpw ()
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function is dangerous as it may overflow the provided buffer
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.IR buf .
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It is obsoleted by
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.BR getpwuid (3).
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.SH "SEE ALSO"
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.BR endpwent (3),
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.BR fgetpwent (3),
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.BR getpwent (3),
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.BR getpwnam (3),
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.BR getpwuid (3),
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.BR putpwent (3),
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.BR setpwent (3),
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.BR passwd (5)
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