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.\" ========================================================================
.\"
.IX Title "tpm_nvwrite 8"
.TH tpm_nvwrite 8 "2011-07-11" "TPM Management" ""
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
tpm_nvwrite
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBtpm_nvwrite [\s-1OPTIONS\s0]\fR
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBtpm_nvwrite\fR writes data to an \s-1NVRAM\s0 area.
The user must provide the index of the \s-1NVRAM\s0 area as well as the data to
write into the \s-1NVRAM\s0 area. Optionally an offset into the \s-1NVRAM\s0
area can be given where the writing of the data is to start. Similarly
the use may provide the number of bytes to write into the
\&\s-1NVRAM\s0 area. Some \s-1NVRAM\s0 areas only allow write sizes of zero, i.e., \s-1NVRAM\s0
area index 0.
If the \s-1NVRAM\s0 area has permission bits set that require owner or \s-1NVRAM\s0 area
authentication, then the password must be provided via the password option.
.PP
The following options are supported:
.IP "\fB\-h, \-\-help\fR" 4
.IX Item "-h, --help"
Display command usage info.
.IP "\fB\-v, \-\-version\fR" 4
.IX Item "-v, --version"
Display command version info.
.IP "\fB\-l, \-\-log [none|error|info|debug]\fR" 4
.IX Item "-l, --log [none|error|info|debug]"
Set logging level.
.IP "\fB\-u, \-\-unicode\fR" 4
.IX Item "-u, --unicode"
Use \s-1TSS\s0 \s-1UNICODE\s0 encoding for passwords to comply with applications
using \s-1TSS\s0 popup boxes
.IP "\fB\-z, \-\-well\-known\fR" 4
.IX Item "-z, --well-known"
Use a secret of all zeros (20 bytes of zeros) as either the \s-1NVRAM\s0 area or owner secret.
.IP "\fB\-p, \-\-password\fR" 4
.IX Item "-p, --password"
Depending on what type of authentication is required for the \s-1NVRAM\s0 area, this must either
be the \s-1NVRAM\s0 area or owner password.
.Sp
A password may be directly provided for example by using '\-\-password=password' or
\&\-ppassword. If no password is provided then the program will prompt the user for the
password.
.IP "\fB\-i, \-\-index\fR (optional parameter)" 4
.IX Item "-i, --index (optional parameter)"
The index of the \s-1NVRAM\s0 area.
The parameter may either be a decimal number or a hexadecimal number starting with '0x'.
.IP "\fB\-s, \-\-size\fR" 4
.IX Item "-s, --size"
The number of bytes to write to the \s-1NVRAM\s0 area. This parameter may be used to truncating
the data that are for example read from a file.
The parameter may either be a decimal number or a hexadecimal number starting with '0x'.
.IP "\fB\-n, \-\-offset\fR (optional parameter)" 4
.IX Item "-n, --offset (optional parameter)"
The offset into the \s-1NVRAM\s0 area where to start writing.
The parameter may either be a decimal number or a hexadecimal number starting with '0x'.
.IP "\fB\-f, \-\-filename\fR (optional parameter)" 4
.IX Item "-f, --filename (optional parameter)"
The name of a file from which to read data and copy them into the \s-1NVRAM\s0 area.
.IP "\fB\-d, \-\-data\fR (optional parameter)" 4
.IX Item "-d, --data (optional parameter)"
The data to write into the \s-1NVRAM\s0 area passed in the command line.
.IP "\fB\-m, \-\-fill\-value\fR (optional parameter)" 4
.IX Item "-m, --fill-value (optional parameter)"
The byte to fill the \s-1NVRAM\s0 area with.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBtpm_nvdefine\fR(8), \fBtpm_nvinfo\fR(8), \fBtpm_nvread\fR(8), \fBtpm_nvrelease\fR(8)
.SH "REPORTING BUGS"
.IX Header "REPORTING BUGS"
Report bugs to <trousers\-users@lists.sourceforge.net>
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