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#!/usr/bin/mawk -We
# *********************************************************************
# Written by and copyright Carlo Strozzi <carlos@linux.it>.
#
# envtotable: convert environment variables into a NoSQL table.
# Copyright (C) 1998-2001 Carlo Strozzi <carlos@linux.it>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# 2001-01-03 Ported to NoSQL v3
# 2001-04-17 Added inline help
# 2001-07-30 Added option '-K'
# 2001-08-17 Added stdio portability
#
# $Id$
# *********************************************************************
BEGIN {
NULL = ""; OFS = "\t"
while (ARGV[++i] != NULL) {
if (ARGV[i] == "-m" || ARGV[i] == "--match") m_pattern = ARGV[++i]
else if (ARGV[i] == "-d" || ARGV[i] == "--delete") {
remove = 1; d_pattern = ARGV[++i]
}
else if (ARGV[i] == "-b" || ARGV[i] == "--blank") {
blank = 1; b_pattern = ARGV[++i]
}
else if (ARGV[i] == "-x" || ARGV[i] == "--debug") debug = 1
else if (ARGV[i] == "-s" || ARGV[i] == "--strip-names") {
strip_names = 1; s_pattern = ARGV[++i]
}
else if (ARGV[i] == "-N" || ARGV[i] == "--no-header") no_hdr = 1
else if (ARGV[i] == "-H" || ARGV[i] == "--header") {
h_file = ARGV[++i]
}
else if (ARGV[i] == "-h" || ARGV[i] == "--help") {
system("grep -v '^#' @DOCPATH@/envtotable.txt")
rc = 1
exit(rc)
}
else if (ARGV[i] == "-p" || ARGV[i] == "--prefix") prefix = ARGV[++i]
else if (ARGV[i] == "-K" || ARGV[i] == "--key") key = ARGV[++i]
}
ARGC = 1 # Fix argv[]
if (debug) {
print "-m pattern: " m_pattern > "@STDERR@"
print "-d pattern: " d_pattern > "@STDERR@"
print "-b pattern: " b_pattern > "@STDERR@"
print "-s pattern: " s_pattern > "@STDERR@"
}
if (m_pattern == NULL) m_pattern = ".*"
if (key != NULL) {
# Do table key first, if requested.
for (env in ENVIRON) {
if (env == key) {
process_var(env)
break
}
}
}
for (env in ENVIRON) {
if (key != NULL && env == key) continue # Already done.
process_var(env)
}
# Print column names.
if (col_names == NULL) exit
if (!no_hdr) print col_names
# Print dashline.
dash_line = col_names
gsub( /[^\t]/, "-", dash_line )
if (!no_hdr) print dash_line
# Print table body.
print out_rec
# Write the detached output header, if requested.
if (h_file != NULL) {
printf("%s\n%s\n", col_names, dash_line) > h_file
}
}
function process_var(env) {
if (env !~ m_pattern) return
# Always skip rc(1) functions and NoSQL-specific stuff.
if (env ~ /^fn_/ || env ~ /^_nosql_/ || env == "NSQPGPPASS") return
# Skip invalid variable names. They may occur when we receive
# them from a WWW Browser.
if (env !~ /^[A-Za-z][A-Za-z0-9_]+$/) {
print "envtotable: bad variable name " env > "@STDERR@"
return
}
# Honour the '-s' switch.
dd = env
if (strip_names) gsub(s_pattern, NULL, dd)
# In case we stripped the whole name.
if (dd == NULL) return
dd = prefix dd
if (j) col_names = col_names OFS dd
else col_names = dd
var = ENVIRON[ env ]
# Honour '-d' and '-b' first.
if (remove) gsub(d_pattern, NULL, var)
if (blank) gsub(b_pattern, " ", var)
# Escape NoSQL special characters in input values.
gsub(/\n/, "\\n", var)
gsub(/\t/, "\\t", var)
if (j) { out_rec = out_rec OFS var; j++ }
else { out_rec = var; j++ }
}
#
# End of program.
#
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