X-Git-Url: http://git.jankratochvil.net/?a=blobdiff_plain;f=src%2Funixpipe.c;fp=src%2Funixpipe.c;h=e03a8df52178fddcf08aff8710e7d39657e7d02b;hb=99fa422f22f367a97118216b705ea5448842b784;hp=0000000000000000000000000000000000000000;hpb=82e0aa5676ee5e3f4b4b06c850294c2ec04d51ec;p=nethome.git

diff --git a/src/unixpipe.c b/src/unixpipe.c
new file mode 100644
index 0000000..e03a8df
--- /dev/null
+++ b/src/unixpipe.c
@@ -0,0 +1,112 @@
+/* $Id$ */
+
+FIXME: Check and tidy it up first!
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/poll.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+
+int main(int argc,char **argv)
+{
+int fdunix,fdpipe;
+struct sockaddr_un sockaddr_unix;
+const char *pathnameunix,*pathnamepipe;
+struct pollfd pollfds[2];
+int fdi,fdo;
+
+	if (argc!=3) {
+		fprintf(stderr,"%s: <pathname UNIX socket> <pathname PIPE>\n",argv[0]);
+		exit(EXIT_FAILURE);
+		}
+	pathnameunix=argv[1];
+	pathnamepipe=argv[2];
+	if (unlink(pathnamepipe) && errno!=ENOENT) {
+		fprintf(stderr,"unlink(\"%s\"): %m\n",pathnamepipe);
+		exit(EXIT_FAILURE);
+		}
+	if (mkfifo(pathnamepipe,0600)) {
+		fprintf(stderr,"mkfifo(\"%s\",0600): %m\n",pathnamepipe);
+		exit(EXIT_FAILURE);
+		}
+	if (-1==(fdpipe=open(pathnamepipe,O_WRONLY))) {
+		fprintf(stderr,"open(\"%s\",O_WRONLY)=%d: %m\n",pathnamepipe,fdpipe);
+		exit(EXIT_FAILURE);
+		}
+	if (-1==(fdunix=socket(PF_UNIX,SOCK_STREAM,0))) {
+		fprintf(stderr,"socket(PF_UNIX,SOCK_STREAM,0)=%d: %m\n",fdunix);
+		exit(EXIT_FAILURE);
+		}
+	memset(&sockaddr_unix,0,sizeof(sockaddr_unix));
+	sockaddr_unix.sun_family=AF_UNIX;
+	strncpy(sockaddr_unix.sun_path,pathnameunix,sizeof(sockaddr_unix.sun_path));
+	if (connect(fdunix,(const struct sockaddr *)&sockaddr_unix,sizeof(sockaddr_unix))) {
+		fprintf(stderr,"connect(UNIX socket,\"%s\"): %m\n",pathnameunix);
+		exit(EXIT_FAILURE);
+		}
+	for (;;) {
+		pollfds[0].fd=fdunix;
+		pollfds[0].events=POLLIN;
+		pollfds[1].fd=fdpipe;
+		pollfds[1].events=POLLIN;
+		if (0>=poll(pollfds,sizeof(pollfds)/sizeof(*pollfds),-1)) {
+			fprintf(stderr,"poll(UNIX socket,PIPE socket): %m\n");
+			exit(EXIT_FAILURE);
+			}
+		if (pollfds[0].revents & (POLLERR|POLLHUP|POLLNVAL)) {
+			fprintf(stderr,"poll(UNIX socket): revents=0x%X\n",(unsigned)pollfds[0].revents);
+			exit(EXIT_FAILURE);
+			}
+		if (pollfds[1].revents & (POLLERR|POLLHUP|POLLNVAL)) {
+			fprintf(stderr,"poll(PIPE socket): revents=0x%X\n",(unsigned)pollfds[1].revents);
+			exit(EXIT_FAILURE);
+			}
+		for (fdi=0;fdi<1 /*sizeof(pollfds)/sizeof(*pollfds)*/;fdi++) {
+			for (;;) {
+				ssize_t got;
+				char buf[0x1000];
+
+				if (fcntl(pollfds[fdi].fd,F_SETFL,O_NONBLOCK)) {
+					fprintf(stderr,"fcntl(%s socket,F_SETFL,O_NONBLOCK): %m\n",
+							(fdi==0 ? "UNIX" : (fdi==1 ? "PIPE" : "<UNKNOWN>")));
+					exit(EXIT_FAILURE);
+					}
+				got=read(pollfds[fdi].fd,buf,sizeof(buf));
+				if (got<0) {
+					if (errno==EAGAIN)
+						break;
+					fprintf(stderr,"read(%s socket): %m\n",
+							(fdi==0 ? "UNIX" : (fdi==1 ? "PIPE" : "<UNKNOWN>")));
+					exit(EXIT_FAILURE);
+					}
+				if (got==0)
+					exit(EXIT_SUCCESS);
+write(1,buf,got);
+				for (fdo=0;fdo<sizeof(pollfds)/sizeof(*pollfds);fdo++) {
+					if (fdi==fdo)
+						continue;
+					if (fcntl(pollfds[fdo].fd,F_SETFL,0 /* !O_NONBLOCK */)) {
+						fprintf(stderr,"fcntl(%s socket,F_SETFL,0 /* !O_NONBLOCK */): %m\n",
+								(fdi==0 ? "UNIX" : (fdi==1 ? "PIPE" : "<UNKNOWN>")));
+						exit(EXIT_FAILURE);
+						}
+					if (got!=write(pollfds[fdo].fd,buf,got)) {
+						fprintf(stderr,"write(%s socket,%ld): %m\n",
+								(fdo==0 ? "UNIX" : (fdo==1 ? "PIPE" : "<UNKNOWN>")),
+								(long)got);
+						exit(EXIT_FAILURE);
+						}
+					}
+				}
+			}
+		}
+	return EXIT_SUCCESS;
+}