[PATCH] iptables: add --line-numbers short option

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Internally, -0 is used as a short option to represent --line-numbers.  This
causes confusion, however, when using --line-numbers with a command which
does not support it.  For instance:

    # /usr/local/iptables/sbin/ip6tables -S --line-numbers
    ip6tables v1.4.20: Illegal option `-0' with this command

Fix this by enabling and documenting -0 as a short option for --line-numbers.

Signed-off-by: Phil Oester <kernel@xxxxxxxxxxxx>

diff --git a/iptables/ip6tables.c b/iptables/ip6tables.c
index 76de367..21f2354 100644
--- a/iptables/ip6tables.c
+++ b/iptables/ip6tables.c
@@ -259,7 +259,7 @@ exit_printhelp(const struct xtables_rule_match *matches)
 "  --table	-t table	table to manipulate (default: `filter')\n"
 "  --verbose	-v		verbose mode\n"
 "  --wait	-w		wait for the xtables lock\n"
-"  --line-numbers		print line numbers when listing\n"
+"  --line-numbers -0		print line numbers when listing\n"
 "  --exact	-x		expand numbers (display exact values)\n"
 /*"[!] --fragment	-f		match second or further fragments only\n"*/
 "  --modprobe=<command>		try to insert modules using this command\n"
@@ -1332,7 +1332,7 @@ int do_command6(int argc, char *argv[], char **table,
 
 	opts = xt_params->orig_opts;
 	while ((cs.c = getopt_long(argc, argv,
-	   "-:A:C:D:R:I:L::S::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:bvwnt:m:xc:g:46",
+	   "-:A:C:D:R:I:L::S::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:bvwnt:m:xc:g:046",
 					   opts, NULL)) != -1) {
 		switch (cs.c) {
 			/*
diff --git a/iptables/iptables.8.in b/iptables/iptables.8.in
index 155c97e..64a1542 100644
--- a/iptables/iptables.8.in
+++ b/iptables/iptables.8.in
@@ -381,7 +381,7 @@ instead of only the rounded number in K's (multiples of 1000)
 M's (multiples of 1000K) or G's (multiples of 1000M).  This option is
 only relevant for the \fB\-L\fP command.
 .TP
-\fB\-\-line\-numbers\fP
+\fB\-0\fP, \fB\-\-line\-numbers\fP
 When listing rules, add line numbers to the beginning of each rule,
 corresponding to that rule's position in the chain.
 .TP
diff --git a/iptables/iptables.c b/iptables/iptables.c
index d3899bc..fc01536 100644
--- a/iptables/iptables.c
+++ b/iptables/iptables.c
@@ -253,7 +253,7 @@ exit_printhelp(const struct xtables_rule_match *matches)
 "  --table	-t table	table to manipulate (default: `filter')\n"
 "  --verbose	-v		verbose mode\n"
 "  --wait	-w		wait for the xtables lock\n"
-"  --line-numbers		print line numbers when listing\n"
+"  --line-numbers -0		print line numbers when listing\n"
 "  --exact	-x		expand numbers (display exact values)\n"
 "[!] --fragment	-f		match second or further fragments only\n"
 "  --modprobe=<command>		try to insert modules using this command\n"
@@ -1328,7 +1328,7 @@ int do_command4(int argc, char *argv[], char **table,
 
 	opts = xt_params->orig_opts;
 	while ((cs.c = getopt_long(argc, argv,
-	   "-:A:C:D:R:I:L::S::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:fbvwnt:m:xc:g:46",
+	   "-:A:C:D:R:I:L::S::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:fbvwnt:m:xc:g:046",
 					   opts, NULL)) != -1) {
 		switch (cs.c) {
 			/*

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