netdev - [patch iproute2 v3 2/4] utils: Add a function setcmdlinetotal

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Date:   Mon, 25 Dec 2017 17:46:56 +0900
From:   Chris Mi <chrism@...lanox.com>
To:     netdev@...r.kernel.org
Cc:     gerlitz.or@...il.com, stephen@...workplumber.org, dsahern@...il.com
Subject: [patch iproute2 v3 2/4] utils: Add a function setcmdlinetotal

This function calculates how many commands a batch file has and
set it to global variable cmdlinetotal.

Signed-off-by: Chris Mi <chrism@...lanox.com>
---
 include/utils.h |  4 ++++
 lib/utils.c     | 20 ++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/include/utils.h b/include/utils.h
index d3895d56..113a8c31 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -235,6 +235,10 @@ void print_nlmsg_timestamp(FILE *fp, const struct nlmsghdr *n);
 
 extern int cmdlineno;
 ssize_t getcmdline(char **line, size_t *len, FILE *in);
+
+extern int cmdlinetotal;
+void setcmdlinetotal(const char *name);
+
 int makeargs(char *line, char *argv[], int maxargs);
 int inet_get_addr(const char *src, __u32 *dst, struct in6_addr *dst6);
 
diff --git a/lib/utils.c b/lib/utils.c
index 7ced8c06..53ca389f 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -1202,6 +1202,26 @@ ssize_t getcmdline(char **linep, size_t *lenp, FILE *in)
 	return cc;
 }
 
+int cmdlinetotal;
+
+void setcmdlinetotal(const char *name)
+{
+	char *line = NULL;
+	size_t len = 0;
+
+	if (name && strcmp(name, "-") != 0) {
+		if (freopen(name, "r", stdin) == NULL) {
+			fprintf(stderr, "Cannot open file \"%s\" for reading: %s\n",
+				name, strerror(errno));
+			return;
+		}
+	}
+
+	cmdlinetotal = 0;
+	while (getcmdline(&line, &len, stdin) != -1)
+		cmdlinetotal++;
+}
+
 /* split command line into argument vector */
 int makeargs(char *line, char *argv[], int maxargs)
 {
-- 
2.14.3