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Date: Fri, 10 Dec 2010 16:58:12 +0200
From: Octavian Purdila <opurdila@...acom.com>
To: netdev@...r.kernel.org
Cc: Lucian Adrian Grijincu <lucian.grijincu@...il.com>,
Vlad Dogaru <ddvlad@...edu.org>,
Octavian Purdila <opurdila@...acom.com>
Subject: [PATCH] iproute2: ip: add wilcard support for device matching
Allow the users to specify a wildcard when selecting a device:
$ ip set link dev dummy* up
We do this by expanding the original command line in multiple lines
which we then feed via a pipe to a forked ip processed run in batch
mode.
Signed-off-by: Octavian Purdila <opurdila@...acom.com>
---
ip/ip.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 70 insertions(+), 0 deletions(-)
diff --git a/ip/ip.c b/ip/ip.c
index b127d57..2e26488 100644
--- a/ip/ip.c
+++ b/ip/ip.c
@@ -18,6 +18,8 @@
#include <netinet/in.h>
#include <string.h>
#include <errno.h>
+#include <sys/types.h>
+#include <sys/wait.h>
#include "SNAPSHOT.h"
#include "utils.h"
@@ -139,10 +141,72 @@ static int batch(const char *name)
return ret;
}
+int main(int argc, char **argv);
+
+int expand_dev_pattern(int argc, char **argv, int pos)
+{
+ FILE *proc;
+ size_t n, dev_no;
+ char scanf_pattern[64], *line = NULL, *dev_base = argv[pos];
+ int p[2], i;
+ pid_t pid;
+
+ *strchr(dev_base, '*') = 0;
+ snprintf(scanf_pattern, sizeof(scanf_pattern), " %s%%d:", dev_base);
+
+ if (pipe(p) < 0) {
+ fprintf(stderr, "pipe() failed: %s\n", strerror(errno));
+ return -1;
+ }
+
+ pid = fork();
+ switch (pid) {
+ case -1:
+ fprintf(stderr, "fork failed: %s\n", strerror(errno));
+ return -1;
+ case 0:
+ {
+ char *nargv[] = { argv[0], "-b", "-" };
+ int ret;
+
+ dup2(p[0], 0); close(p[0]); close(p[1]);
+ ret = main(3, nargv);
+ exit(ret);
+ }
+ default:
+ dup2(p[1], 1); close(p[0]); close(p[1]);
+ }
+
+ proc = fopen("/proc/net/dev", "r");
+ if (!proc) {
+ fprintf(stderr, "can't open /proc/net/dev\n");
+ return -1;
+ }
+
+ while (getline(&line, &n, proc) > 0) {
+ if (sscanf(line, scanf_pattern, &dev_no) == 1) {
+ for (i = 1; i < argc; i++)
+ if (i != pos)
+ printf("%s ", argv[i]);
+ else
+ printf("%s%d ", dev_base, dev_no);
+ printf("\n");
+ }
+ }
+ free(line);
+
+ fflush(stdout); close(1);
+
+ waitpid(pid, NULL, 0);
+
+ return 0;
+}
int main(int argc, char **argv)
{
char *basename;
+ int i = 0;
+
basename = strrchr(argv[0], '/');
if (basename == NULL)
@@ -150,6 +214,12 @@ int main(int argc, char **argv)
else
basename++;
+ for (i = 1; i < argc - 1; i++) {
+ if (matches(argv[i], "dev") == 0 && strchr(argv[i+1], '*')) {
+ return expand_dev_pattern(argc, argv, i+1);
+ }
+ }
+
while (argc > 1) {
char *opt = argv[1];
if (strcmp(opt,"--") == 0) {
--
1.7.1
--
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