Add dtach -p.

dtach -p copies the contents of standard input to a session.

Based on an initial patch by @johnlane.

1 files changed, 67 insertions, 0 deletions

diff --git a/attach.c b/attach.c
index 45788e2..c01e86d 100644
--- a/attach.c
+++ b/attach.c
@@ -292,3 +292,70 @@ attach_main(int noerror)
 	}
 	return 0;
 }
+
+int
+push_main()
+{
+	struct packet pkt;
+	int s;
+
+	/* Attempt to open the socket. */
+	s = connect_socket(sockname);
+	if (s < 0 && errno == ENAMETOOLONG)
+	{
+		char *slash = strrchr(sockname, '/');
+
+		/* Try to shorten the socket's path name by using chdir. */
+		if (slash)
+		{
+			int dirfd = open(".", O_RDONLY);
+
+			if (dirfd >= 0)
+			{
+				*slash = '\0';
+				if (chdir(sockname) >= 0)
+				{
+					s = connect_socket(slash + 1);
+					fchdir(dirfd);
+				}
+				*slash = '/';
+				close(dirfd);
+			}
+		}
+	}
+	if (s < 0)
+	{
+		printf("%s: %s: %s\n", progname, sockname, strerror(errno));
+		return 1;
+	}
+
+	/* Set some signals. */
+	signal(SIGPIPE, SIG_IGN);
+
+	/* Push the contents of standard input to the socket. */
+	pkt.type = MSG_PUSH;
+	for (;;)
+	{
+		ssize_t len;
+
+		memset(pkt.u.buf, 0, sizeof(pkt.u.buf));
+		len = read(0, pkt.u.buf, sizeof(pkt.u.buf));
+
+		if (len == 0)
+			return 0;
+		else if (len < 0)
+		{
+			printf("%s: %s: %s\n", progname, sockname,
+			       strerror(errno));
+			return 1;
+		}
+
+		pkt.len = len;
+		if (write(s, &pkt, sizeof(struct packet)) < 0)
+		{
+			printf("%s: %s: %s\n", progname, sockname,
+			       strerror(errno));
+			return 1;
+		}
+	}
+}