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nwfilter: drop use of awk

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Commit 2a41bc9 dropped a dependency on gawk, but we can go one step
further and avoid awk altogether.

* src/nwfilter/nwfilter_ebiptables_driver.c
(iptablesLinkIPTablesBaseChain): Simplify command.
(ebiptablesDriverInit, ebiptablesDriverShutdown): Drop awk probe.
This commit is contained in:
Eric Blake 2012-08-31 15:54:48 -07:00
parent f20b7dbe63
commit ddd8c3b995
1 changed files with 4 additions and 10 deletions
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14
src/nwfilter/nwfilter_ebiptables_driver.c
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@ -84,7 +84,6 @@ static char *ebtables_cmd_path;
static char *iptables_cmd_path;
static char *ip6tables_cmd_path;
static char *grep_cmd_path;
static char *awk_cmd_path;
#define PRINT_ROOT_CHAIN(buf, prefix, ifname) \
snprintf(buf, sizeof(buf), "libvirt-%c-%s", prefix, ifname)
@ -565,12 +564,11 @@ static int iptablesLinkIPTablesBaseChain(virBufferPtr buf,
int stopOnError)
{
virBufferAsprintf(buf,
"res=$($IPT -L %s -n --line-number | "
"%s \" %s \")\n"
"res=$($IPT -L %s -n --line-number | %s '%s')\n"
"if [ $? -ne 0 ]; then\n"
" $IPT -I %s %d -j %s\n"
"else\n"
" r=$(echo $res | %s '{print $1}')\n"
" set dummy $res; r=$2\n"
" if [ \"${r}\" != \"%d\" ]; then\n"
" " CMD_DEF("$IPT -I %s %d -j %s") CMD_SEPARATOR
" " CMD_EXEC
@ -582,11 +580,9 @@ static int iptablesLinkIPTablesBaseChain(virBufferPtr buf,
" fi\n"
"fi\n",
syschain,
grep_cmd_path, udchain,
syschain, grep_cmd_path, udchain,
syschain, pos, udchain,
awk_cmd_path,
pos,
@ -4295,7 +4291,6 @@ ebiptablesDriverInit(bool privileged)
if (virMutexInit(&execCLIMutex) < 0)
return -EINVAL;
awk_cmd_path = virFindFileInPath("awk");
grep_cmd_path = virFindFileInPath("grep");
/*
@ -4311,7 +4306,7 @@ ebiptablesDriverInit(bool privileged)
/* ip(6)tables support needs awk & grep, ebtables doesn't */
if ((iptables_cmd_path != NULL || ip6tables_cmd_path != NULL) &&
(!grep_cmd_path || !awk_cmd_path)) {
!grep_cmd_path) {
VIR_ERROR(_("essential tools to support ip(6)tables "
"firewalls could not be located"));
VIR_FREE(iptables_cmd_path);
@ -4333,7 +4328,6 @@ ebiptablesDriverInit(bool privileged)
static void
ebiptablesDriverShutdown(void)
{
VIR_FREE(awk_cmd_path);
VIR_FREE(grep_cmd_path);
VIR_FREE(ebtables_cmd_path);
VIR_FREE(iptables_cmd_path);