[PATCH v2 iproute2] misc: make the pattern matching case-insensitive

[Anton Danilov <littlesmilingcloud@gmail.com>]

To improve the usability better use case-insensitive pattern-matching
in ifstat, nstat and ss tools.

Signed-off-by: Anton Danilov <littlesmilingcloud@gmail.com>
---
 man/man8/rtacct.8 | 7 +++++++
 misc/ifstat.c     | 2 +-
 misc/nstat.c      | 2 +-
 misc/ss.c         | 2 +-
 4 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/man/man8/rtacct.8 b/man/man8/rtacct.8
index ccdbf6ca..988a6d1b 100644
--- a/man/man8/rtacct.8
+++ b/man/man8/rtacct.8
@@ -14,6 +14,13 @@ and
 .B rtacct
 are simple tools to monitor kernel snmp counters and network interface statistics.
 
+.B nstat
+can filter kernel snmp counters by name with one or several specified wildcards. Wildcards are case-insensitive and can include special symbols
+.B ?
+and
+.B *
+.
+
 .SH OPTIONS
 .B \-h, \-\-help
 Print help
diff --git a/misc/ifstat.c b/misc/ifstat.c
index 60efe6cb..03327af8 100644
--- a/misc/ifstat.c
+++ b/misc/ifstat.c
@@ -104,7 +104,7 @@ static int match(const char *id)
 		return 1;
 
 	for (i = 0; i < npatterns; i++) {
-		if (!fnmatch(patterns[i], id, 0))
+		if (!fnmatch(patterns[i], id, FNM_CASEFOLD))
 			return 1;
 	}
 	return 0;
diff --git a/misc/nstat.c b/misc/nstat.c
index 425e75ef..88f52eaf 100644
--- a/misc/nstat.c
+++ b/misc/nstat.c
@@ -114,7 +114,7 @@ static int match(const char *id)
 		return 1;
 
 	for (i = 0; i < npatterns; i++) {
-		if (!fnmatch(patterns[i], id, 0))
+		if (!fnmatch(patterns[i], id, FNM_CASEFOLD))
 			return 1;
 	}
 	return 0;
diff --git a/misc/ss.c b/misc/ss.c
index f3d01812..5aa10e4a 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -1670,7 +1670,7 @@ static int unix_match(const inet_prefix *a, const inet_prefix *p)
 		return 1;
 	if (addr == NULL)
 		addr = "";
-	return !fnmatch(pattern, addr, 0);
+	return !fnmatch(pattern, addr, FNM_CASEFOLD);
 }
 
 static int run_ssfilter(struct ssfilter *f, struct sockstat *s)
-- 
2.26.2