sockread: add new package

sockread reads data from a Unix domain socket

Signed-off-by: Moritz Warning <[email protected]>

diff --git a/utils/sockread/Makefile b/utils/sockread/Makefile
new file mode 100644 (file)
index 0000000..78beee2
--- /dev/null
+++ b/utils/sockread/Makefile
@@ -0,0 +1,35 @@
+#
+# This software is licensed under the CC0-1.0 license.
+#
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=sockread
+PKG_VERSION:=1.0
+PKG_RELEASE:=1
+PKG_LICENSE:=CC0-1.0
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/sockread
+       SECTION:=utils
+       CATEGORY:=Utilities
+       TITLE:=sockread
+       MAINTAINER:=Moritz Warning <[email protected]>
+endef
+
+define Package/sockread/description
+       sockread reads data from a Unix domain socket
+       represented as a special file on the file system.
+endef
+
+define Build/Prepare
+       mkdir -p $(PKG_BUILD_DIR)
+       $(CP) ./src/* $(PKG_BUILD_DIR)/
+endef
+
+define Package/sockread/install
+       $(INSTALL_DIR) $(1)/usr/bin
+       $(INSTALL_BIN) $(PKG_BUILD_DIR)/sockread $(1)/usr/bin/
+endef
+
+$(eval $(call BuildPackage,sockread))

diff --git a/utils/sockread/src/Makefile b/utils/sockread/src/Makefile
new file mode 100644 (file)
index 0000000..fe4f8a7
--- /dev/null
+++ b/utils/sockread/src/Makefile
@@ -0,0 +1,11 @@
+CC ?= gcc
+CFLAGS ?= -O2 -Wall -pedantic
+CFLAGS += -std=gnu99
+
+.PHONY: clean
+
+sockread:
+       $(CC) $(CFLAGS) main.c -o sockread
+
+clean:
+       rm -f sockread

diff --git a/utils/sockread/src/main.c b/utils/sockread/src/main.c
new file mode 100644 (file)
index 0000000..3343f2a
--- /dev/null
+++ b/utils/sockread/src/main.c
@@ -0,0 +1,55 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+
+int main(int argc, char *argv[]) {
+       if (argc != 2) {
+               fprintf(stderr, "Usage: %s <socket>\n", argv[0]);
+               return 1;
+       }
+
+       size_t addrlen = strlen(argv[1]);
+
+       /* Allocate enough space for arbitrary-length paths */
+       char addrbuf[offsetof(struct sockaddr_un, sun_path) + addrlen + 1];
+       memset(addrbuf, 0, sizeof(addrbuf));
+
+       struct sockaddr_un *addr = (struct sockaddr_un *)addrbuf;
+       addr->sun_family = AF_UNIX;
+       memcpy(addr->sun_path, argv[1], addrlen+1);
+
+       int fd = socket(AF_UNIX, SOCK_STREAM, 0);
+       if (fd < 0) {
+               fprintf(stderr, "Failed to create socket: %s\n", strerror(errno));
+               return 1;
+       }
+
+       if (connect(fd, (struct sockaddr*)addr, sizeof(addrbuf)) < 0) {
+               fprintf(stderr, "Can't connect to `%s': %s\n", argv[1], strerror(errno));
+               return 1;
+       }
+
+       char buf[1024];
+       ssize_t r;
+       while (1) {
+               r = recv(fd, buf, sizeof(buf), 0);
+               if (r < 0) {
+                       fprintf(stderr, "read: %s\n", strerror(errno));
+                       return 1;
+               }
+
+               if (r == 0)
+                       return 0;
+
+               fwrite(buf, r, 1, stdout);
+       }
+
+       return 0;
+}