netdev - [PATCH iproute2 v2] iproute2: move generic_proc

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Date: Thu, 29 Feb 2024 07:54:49 -0500
From: Denis Kirjanov <kirjanov@...il.com>
To: stephen@...workplumber.org
Cc: netdev@...r.kernel.org,
	Denis Kirjanov <dkirjanov@...e.de>
Subject: [PATCH iproute2 v2] iproute2: move generic_proc_open into lib

the function has the same definition in ifstat and ss

v2: fix the typo in the chnagelog

Signed-off-by: Denis Kirjanov <dkirjanov@...e.de>
---
 include/utils.h |  2 ++
 lib/utils.c     | 14 ++++++++++++++
 misc/nstat.c    | 29 ++++++++---------------------
 misc/ss.c       | 13 -------------
 4 files changed, 24 insertions(+), 34 deletions(-)

diff --git a/include/utils.h b/include/utils.h
index 9ba129b8..a2a98b9b 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -393,4 +393,6 @@ int proto_a2n(unsigned short *id, const char *buf,
 const char *proto_n2a(unsigned short id, char *buf, int len,
 		      const struct proto *proto_tb, size_t tb_len);
 
+FILE *generic_proc_open(const char *env, const char *name);
+
 #endif /* __UTILS_H__ */
diff --git a/lib/utils.c b/lib/utils.c
index 6c1c1a8d..deb7654a 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -2003,3 +2003,17 @@ int proto_a2n(unsigned short *id, const char *buf,
 
 	return 0;
 }
+
+FILE *generic_proc_open(const char *env, const char *name)
+{
+	const char *p = getenv(env);
+	char store[128];
+
+	if (!p) {
+		p = getenv("PROC_ROOT") ? : "/proc";
+		snprintf(store, sizeof(store) - 1, "%s/%s", p, name);
+		p = store;
+	}
+
+	return fopen(p, "r");
+}
diff --git a/misc/nstat.c b/misc/nstat.c
index 2c10feaa..63d177d1 100644
--- a/misc/nstat.c
+++ b/misc/nstat.c
@@ -43,35 +43,22 @@ int npatterns;
 char info_source[128];
 int source_mismatch;
 
-static int generic_proc_open(const char *env, char *name)
-{
-	char store[128];
-	char *p = getenv(env);
-
-	if (!p) {
-		p = getenv("PROC_ROOT") ? : "/proc";
-		snprintf(store, sizeof(store)-1, "%s/%s", p, name);
-		p = store;
-	}
-	return open(p, O_RDONLY);
-}
-
-static int net_netstat_open(void)
+static FILE *net_netstat_open(void)
 {
 	return generic_proc_open("PROC_NET_NETSTAT", "net/netstat");
 }
 
-static int net_snmp_open(void)
+static FILE *net_snmp_open(void)
 {
 	return generic_proc_open("PROC_NET_SNMP", "net/snmp");
 }
 
-static int net_snmp6_open(void)
+static FILE *net_snmp6_open(void)
 {
 	return generic_proc_open("PROC_NET_SNMP6", "net/snmp6");
 }
 
-static int net_sctp_snmp_open(void)
+static FILE *net_sctp_snmp_open(void)
 {
 	return generic_proc_open("PROC_NET_SCTP_SNMP", "net/sctp/snmp");
 }
@@ -277,7 +264,7 @@ static void load_ugly_table(FILE *fp)
 
 static void load_sctp_snmp(void)
 {
-	FILE *fp = fdopen(net_sctp_snmp_open(), "r");
+	FILE *fp = net_sctp_snmp_open();
 
 	if (fp) {
 		load_good_table(fp);
@@ -287,7 +274,7 @@ static void load_sctp_snmp(void)
 
 static void load_snmp(void)
 {
-	FILE *fp = fdopen(net_snmp_open(), "r");
+	FILE *fp = net_snmp_open();
 
 	if (fp) {
 		load_ugly_table(fp);
@@ -297,7 +284,7 @@ static void load_snmp(void)
 
 static void load_snmp6(void)
 {
-	FILE *fp = fdopen(net_snmp6_open(), "r");
+	FILE *fp = net_snmp6_open();
 
 	if (fp) {
 		load_good_table(fp);
@@ -307,7 +294,7 @@ static void load_snmp6(void)
 
 static void load_netstat(void)
 {
-	FILE *fp = fdopen(net_netstat_open(), "r");
+	FILE *fp = net_netstat_open();
 
 	if (fp) {
 		load_ugly_table(fp);
diff --git a/misc/ss.c b/misc/ss.c
index 5296cabe..11a0ed57 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -457,19 +457,6 @@ static void filter_merge_defaults(struct filter *f)
 	}
 }
 
-static FILE *generic_proc_open(const char *env, const char *name)
-{
-	const char *p = getenv(env);
-	char store[128];
-
-	if (!p) {
-		p = getenv("PROC_ROOT") ? : "/proc";
-		snprintf(store, sizeof(store)-1, "%s/%s", p, name);
-		p = store;
-	}
-
-	return fopen(p, "r");
-}
 #define net_tcp_open()		generic_proc_open("PROC_NET_TCP", "net/tcp")
 #define net_tcp6_open()		generic_proc_open("PROC_NET_TCP6", "net/tcp6")
 #define net_udp_open()		generic_proc_open("PROC_NET_UDP", "net/udp")
-- 
2.30.2