1 files changed, 61 insertions, 0 deletions
diff --git a/userspace/ebtables2/ebtablesu.c b/userspace/ebtables2/ebtablesu.c
new file mode 100644
index 0000000..234d4f6
--- /dev/null
+++ b/userspace/ebtables2/ebtablesu.c
@@ -0,0 +1,61 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+int main(int argc, char *argv[])
+{
+	char *arguments, *pos;
+	int i, writefd, len = 0;
+
+	if ((writefd = open(EBTD_PIPE, O_WRONLY, 0)) == -1) {
+		perror("open");
+		return -1;
+	}
+
+	if (argc > EBTD_ARGC_MAX) {
+		printf("ebtablesd accepts at most %d arguments, %d arguments "
+		       "were specified. If you need this many arguments, "
+		       "recompile this tool with a higher value for "
+		       "EBTD_ARGC_MAX.\n", EBTD_ARGC_MAX - 1, argc - 1);
+		return -1;
+	} else if (argc == 1) {
+		printf("At least one argument is needed.\n");
+		return -1;
+	}
+
+	for (i = 0; i < argc; i++)
+		len += strlen(argv[i]);
+	/* Don't forget '\0' */
+	len += argc;
+	if (len > EBTD_CMDLINE_MAXLN) {
+		printf("ebtablesd has a maximum command line argument length "
+		       "of %d, an argument length of %d was received. If a "
+		       "smaller length is unfeasible, recompile this tool "
+		       "with a higher value for EBTD_CMDLINE_MAXLN.\n",
+		       EBTD_CMDLINE_MAXLN, len);
+		return -1;
+	}
+
+	if (!(arguments = (char *)malloc(len))) {
+		printf("ebtablesu: out of memory.\n");
+		return -1;
+	}
+
+	pos = arguments;
+	for (i = 0; i < argc; i++) {
+		strcpy(pos, argv[i]);
+		pos += strlen(argv[i]) + 1;
+	}
+
+	*(pos-1) = '\n';
+	if (write(writefd, arguments, len) == -1) {
+		perror("write");
+		return -1;
+	}
+	return 0;
+}