[PATCH 3/5] Add some field value checking for number

[Zhang Xiliang]

Hello Steve, 

Some fields don't support value which isnot number. 

For example,
auditctl -a exit,always -F pid=a

No error message is output and "pid=0" is added to rule.
I think we should add checking for it.

Signed-off-by: Zhang Xiliang <zhangxiliang at cn.fujitsu.com>
---
 lib/deprecated.c |    3 +++
 lib/libaudit.c   |    3 +++
 src/auditctl.c   |    5 +++++
 3 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/lib/deprecated.c b/lib/deprecated.c
index 5a1c04f..d6cdbe4 100644
--- a/lib/deprecated.c
+++ b/lib/deprecated.c
@@ -446,6 +446,9 @@ int audit_rule_fieldpair(struct audit_rule *rule, const char *pair, int flags)
 			
 			if (flags == AUDIT_FILTER_EXCLUDE)
 				return -18;
+			
+			if (!isdigit((char)*(v)))
+				return -21;
 
 			rule->values[rule->field_count] = strtol(v, NULL, 0);
 			break;
diff --git a/lib/libaudit.c b/lib/libaudit.c
index 6ec15d8..3e2e28f 100644
--- a/lib/libaudit.c
+++ b/lib/libaudit.c
@@ -1101,6 +1101,9 @@ int audit_rule_fieldpair_data(struct audit_rule_data **rulep, const char *pair,
 			if (flags == AUDIT_FILTER_EXCLUDE)
 				return -18;
 
+			if (!isdigit((char)*(v)))
+				return -21;
+
 			rule->values[rule->field_count] = strtol(v, NULL, 0);
 			break;
 	}
diff --git a/src/auditctl.c b/src/auditctl.c
index a19bd14..1455ee6 100644
--- a/src/auditctl.c
+++ b/src/auditctl.c
@@ -852,6 +852,11 @@ static int setopt(int count, char *vars[])
 					"-F missing value after opration for %s\n", optarg);
 				retval = -1;
 				break;
+			case -21:
+				fprintf(stderr,
+					"-F value should be number for %s\n", optarg);
+				retval = -1;
+				break;
 			default:
 				retval = -1;
 				break;