From mboxrd@z Thu Jan 1 00:00:00 1970 From: Octavian Purdila Subject: [PATCH] iproute2: ip: add wilcard support for device matching Date: Fri, 10 Dec 2010 16:58:12 +0200 Message-ID: <1291993092-8675-1-git-send-email-opurdila@ixiacom.com> Cc: Lucian Adrian Grijincu , Vlad Dogaru , Octavian Purdila To: netdev@vger.kernel.org Return-path: Received: from ixro-out-rtc.ixiacom.com ([92.87.192.98]:9101 "EHLO ixro-ex1.ixiacom.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755564Ab0LJO7L (ORCPT ); Fri, 10 Dec 2010 09:59:11 -0500 Sender: netdev-owner@vger.kernel.org List-ID: 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 --- 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 #include #include +#include +#include #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