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+.\" Title: pam_putenv
+.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
+.\" Generator: DocBook XSL Stylesheets v1.74.0 <http://docbook.sf.net/>
+.\" Date: 10/27/2010
+.\" Manual: Linux-PAM Manual
+.\" Source: Linux-PAM Manual
+.\" Language: English
+.\"
+.TH "PAM_PUTENV" "3" "10/27/2010" "Linux-PAM Manual" "Linux-PAM Manual"
+.\" -----------------------------------------------------------------
+.\" * (re)Define some macros
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" toupper - uppercase a string (locale-aware)
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.de toupper
+.tr aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ
+\\$*
+.tr aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz
+..
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" SH-xref - format a cross-reference to an SH section
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.de SH-xref
+.ie n \{\
+.\}
+.toupper \\$*
+.el \{\
+\\$*
+.\}
+..
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" SH - level-one heading that works better for non-TTY output
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+.ie n \{\
+.\" if n (TTY output), use uppercase
+.toupper \\$*
+.\}
+.el \{\
+.nr an-break-flag 0
+.\" if not n (not TTY), use normal case (not uppercase)
+\\$1
+.in \\n[an-margin]u
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+.\" if not n (not TTY), put a border/line under subheading
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+.\}
+..
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+..
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" BB/BE - put background/screen (filled box) around block of text
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.de BB
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+.\}
+.el \{\
+\M[\\$1]\h'1n'\v'-.5v'\D'P \\n(BWu 0 0 \\n(BHu -\\n(BWu 0 0 -\\n(BHu'\M[]
+.\}
+.in 0
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+..
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" BM/EM - put colored marker in margin next to block of text
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+..
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+.in
+.fi
+.\}
+..
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "Name"
+pam_putenv \- set or change PAM environment variable
+.SH "Synopsis"
+.sp
+.ft B
+.fam C
+.ps -1
+.nf
+#include <security/pam_appl\&.h>
+.fi
+.fam
+.ps +1
+.ft
+.fam C
+.HP \w'int\ pam_putenv('u
+.BI "int pam_putenv(pam_handle_t\ *" "pamh" ", const\ char\ *" "name_value" ");"
+.fam
+.SH "DESCRIPTION"
+.PP
+The
+\fBpam_putenv\fR
+function is used to add or change the value of PAM environment variables as associated with the
+\fIpamh\fR
+handle\&.
+.PP
+The
+\fIpamh\fR
+argument is an authentication handle obtained by a prior call to pam_start()\&. The
+\fIname_value\fR
+argument is a single NUL terminated string of one of the following forms:
+.PP
+NAME=value of variable
+.RS 4
+In this case the environment variable of the given NAME is set to the indicated value:
+\fIvalue of variable\fR\&. If this variable is already known, it is overwritten\&. Otherwise it is added to the PAM environment\&.
+.RE
+.PP
+NAME=
+.RS 4
+This function sets the variable to an empty value\&. It is listed separately to indicate that this is the correct way to achieve such a setting\&.
+.RE
+.PP
+NAME
+.RS 4
+Without an \'=\' the
+\fBpam_putenv\fR() function will delete the corresponding variable from the PAM environment\&.
+.RE
+.PP
+
+\fBpam_putenv\fR() operates on a copy of
+\fIname_value\fR, which means in contrast to
+\fBputenv\fR(3), the application is responsible to free the data\&.
+.SH "RETURN VALUES"
+.PP
+PAM_PERM_DENIED
+.RS 4
+Argument
+\fIname_value\fR
+given is a NULL pointer\&.
+.RE
+.PP
+PAM_BAD_ITEM
+.RS 4
+Variable requested (for deletion) is not currently set\&.
+.RE
+.PP
+PAM_ABORT
+.RS 4
+The
+\fIpamh\fR
+handle is corrupt\&.
+.RE
+.PP
+PAM_BUF_ERR
+.RS 4
+Memory buffer error\&.
+.RE
+.PP
+PAM_SUCCESS
+.RS 4
+The environment variable was successfully updated\&.
+.RE
+.SH "SEE ALSO"
+.PP
+
+\fBpam_start\fR(3),
+\fBpam_getenv\fR(3),
+\fBpam_getenvlist\fR(3),
+\fBpam_strerror\fR(3),
+\fBpam\fR(8)