diff --git a/utils/sockread/Makefile b/utils/sockread/Makefile new file mode 100644 index 0000000000..78beee2483 --- /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 +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 index 0000000000..fe4f8a7c21 --- /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 index 0000000000..3343f2a456 --- /dev/null +++ b/utils/sockread/src/main.c @@ -0,0 +1,55 @@ + +#include +#include +#include +#include +#include +#include +#include +#include + + +int main(int argc, char *argv[]) { + if (argc != 2) { + fprintf(stderr, "Usage: %s \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; +}