07-07-2016
So does the
NR == 1 store the header that is already there? Thank you
.
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LEARN ABOUT HPUX
smfi_insheader
smfi_insheader(3N) smfi_insheader(3N)
NAME
smfi_insheader() - prepends a header to the current sendmail message
SYNOPSIS
PARAMETERS
ctx Specifies the opaque context structure.
hdridx Specifies the location in the internal header list where the header must be inserted. A value of 0 (zero) places the header in
the beginning of the header.
headerf Specifies the header name, which is a non-NULL, null-terminated string.
headerv Specifies the header value to be added. A header value is a non-NULL, null-terminated string and can be an empty string.
DESCRIPTION
prepends a header to the current message. can be called only from the function.
Notes
o does not change existing headers of a message. To change the current value of a header, use the routine.
o A filter that calls must set the flag in the structure passed to the routine.
o For the filter, the order in which filters are placed is imporant. Filters placed later in the sequence will observe the changes
already done by the earlier filters.
o If the value of hdridx larger than the number of headers in the message, the header is simply be appended.
o The name and the value of the header are not checked for standards compliance. However, each line of the header must be under 2048
characters. If longer headers are needed, multi-line header must be used. To make a multi-line header, insert a linefeed (ASCII 0x0a,
or
in C) followed by at least one whitespace character, such as, a space (ASCII 0x20) or tab (ASCII 0x09, or in C). The linefeed
must not be preceded by a carriage return (ASCII 0x0d); the MTA adds this automatically. It is the responsibility of the filter writer
to ensure that standards are not violated.
RETURN VALUE
returns due to the following reasons:
o The headerf or headerv value is NULL.
o Adding headers in the current connection state is invalid.
o Memory allocation fails.
o Network error occurs.
o is not set when is called.
returns on success.
EXAMPLES
AUTHOR
was developed by the Sendmail Inc.
SEE ALSO
smfi_chgheader(3N), smfi_addheader(3N), smfi_addrcpt(3N), smfi_delrcpt(3N), smfi_replacebody(3N).
on
smfi_insheader(3N)