awk '/range start/,/range end/' within script - awk

Question

How do I use the awk range pattern '/begin regex/,/end regex/' within a self-contained awk script?
To clarify, given program csv.awk:
#!/usr/bin/awk -f
BEGIN {
FS = "\""
}
/TREE/,/^$/
{
line="";
for (i=1; i<=NF; i++) {
if (i != 2) line=line $i;
}
split(line, v, ",");
if (v[5] ~ "FOAM") {
print NR, v[5];
}
}
and file chunk:
TREE
10362900,A,INSTL - SEAL,Revise
,10362901,A,ASSY / DETAIL - PANEL,Revise
,,-203,ASSY - PANEL,Qty -,Add
,,,-309,PANEL,Qty 1,Add
,,,,"FABRICATE FROM TEKLAM NE1G1-02-250 PER TPS-CN-500, TYPE A"
,,,-311,PANEL,Qty 1,Add
,,,,"FABRICATE FROM TEKLAM NE1G1-02-750 PER TPS-CN-500, TYPE A"
,,,-313,FOAM SEAL,1.00 X 20.21 X .50 THK,Qty 1,Add
,,,,"BMS1-68, GRADE B, FORM II, COLOR BAC706 (BLACK)"
,,,-315,FOAM SEAL,1.50 X 8.00 X .25 THK,Qty 1,Add
,,,,"BMS1-68, GRADE B, FORM II, COLOR BAC706 (BLACK)"
,PN HERE,Dual Lock,Add
,
10442900,IR,INSTL - SEAL,Update (not released)
,10362901,A,ASSY / DETAIL - PANEL,Revise
,PN HERE,Dual Lock,Add
I want to have this output:
27 FOAM SEAL
29 FOAM SEAL
What is the syntax for adding the command line form '/begin regex/,/end regex/' to the script to operate on those lines only? All my attempts lead to syntax errors and googling only gives me the cli form.

Answer 1

why not use 2 steps:
% awk '/start/,/end/' < input.csv | awk csv.awk

Answer 2

Simply do:
#!/usr/bin/awk -f
BEGIN {
FS = "\""
}
/from/,/to/ {
line="";
for (i=1; i<=NF; i++) {
if (i != 2) line=line $i;
}
split(line, v, ",");
if (v[5] ~ "FOAM") {
print NR, v[5];
}
}
If the from to regexes are dynamic:
#!/usr/bin/awk -f
BEGIN {
FS = "\""
FROM=ARGV[1]
TO=ARGV[2]
if (ARGC == 4) { # the pattern was the only thing, so force read from standard input
ARGV[1] = "-"
} else {
ARGV[1] = ARGV[3]
}
}
{ if ($0 ~ FROM) { p = 1 ; l = 0} }
{ if ($0 ~ TO) { p = 0 ; l = 1} }
{
if (p == 1 || l == 1) {
line="";
for (i=1; i<=NF; i++) {
if (i != 2) line=line $i;
}
split(line, v, ",");
if (v[5] ~ "FOAM") {
print NR, v[5];
}
l = 0 }
}
Now you have to call it like: ./scriptname.awk "FROM_REGEX" "TO_REGEX" INPUTFILE. The last param is optional, if missing STDIN can be used.
HTH

Answer 3

You need to show us what you have tried. Is there something about /begin regex/ or /end regex/ you're not telling us, other wise your script with the additions should work, i.e.
#!/usr/bin/awk -f
BEGIN {
FS = "\""
}
/begin regex/,/end regex/{
line="";
for (i=1; i<=NF; i++) {
if (i != 2) line=line $i;
}
split(line, v, ",");
if (v[5] ~ "FOAM") {
print NR, v[5];
}
}
OR are you using an old Unix, where there is old awk as /usr/bin/awk and New awk as /usr/bin/nawk. Also see if you have /usr/xpg4/bin/awk or gawk (path could be anything).
Finally, show us the error messages you are getting.
I hope this helps.