X-Git-Url: http://git.marmaro.de/?p=mmh;a=blobdiff_plain;f=uip%2Fmhshow.c;h=c32386722c367fe75d8e62eebff3fcec40a2a3ef;hp=53f96f242afa792bfcf2a61801fe77ef2aa31033;hb=a4197ea6ffc5c1550e8b52d5a654bcaaaee04a4e;hpb=7ca05c3df912f540c1f25b3be4d1733f5a3ad1b4

diff --git a/uip/mhshow.c b/uip/mhshow.c
index 53f96f2..c323867 100644
--- a/uip/mhshow.c
+++ b/uip/mhshow.c
@@ -79,6 +79,8 @@ void freects_done(int) NORETURN;
 ** static prototypes
 */
 static void pipeser(int);
+static void m_popen(char *);
+static void m_pclose(void);
 
 
 int
@@ -92,6 +94,7 @@ main(int argc, char **argv)
 	struct msgs *mp = NULL;
 	CT ct, *ctp;
 	FILE *fp;
+	int ontty = 0;
 
 	done=freects_done;
 
@@ -313,11 +316,19 @@ main(int argc, char **argv)
 		}
 	}
 
+	if ((ontty = isatty(fileno(stdout)))) {
+		m_popen(defaultpager);
+	}
+
 	/*
 	** Show the message content
 	*/
 	show_all_messages(cts);
 
+	if (ontty) {
+		m_pclose();
+	}
+
 	/* Now free all the structures for the content */
 	for (ctp = cts; *ctp; ctp++)
 		free_content(*ctp);
@@ -351,3 +362,68 @@ pipeser(int i)
 	done(1);
 	/* NOTREACHED */
 }
+
+
+static int m_pid = NOTOK;
+static int sd = NOTOK;
+
+
+static void
+m_popen(char *name)
+{
+	int pd[2];
+
+	if ((sd = dup(fileno(stdout))) == NOTOK)
+		adios("standard output", "unable to dup()");
+
+	if (pipe(pd) == NOTOK)
+		adios("pipe", "unable to");
+
+	switch (m_pid = fork()) {
+	case NOTOK:
+		adios("fork", "unable to");
+
+	case OK:
+		SIGNAL(SIGINT, SIG_DFL);
+		SIGNAL(SIGQUIT, SIG_DFL);
+
+		close(pd[1]);
+		if (pd[0] != fileno(stdin)) {
+			dup2(pd[0], fileno(stdin));
+			close(pd[0]);
+		}
+		execlp(name, mhbasename(name), NULL);
+		fprintf(stderr, "unable to exec ");
+		perror(name);
+		_exit(-1);
+
+	default:
+		close(pd[0]);
+		if (pd[1] != fileno(stdout)) {
+			dup2(pd[1], fileno(stdout));
+			close(pd[1]);
+		}
+	}
+}
+
+
+void
+m_pclose(void)
+{
+	if (m_pid == NOTOK)
+		return;
+
+	if (sd != NOTOK) {
+		fflush(stdout);
+		if (dup2(sd, fileno(stdout)) == NOTOK)
+			adios("standard output", "unable to dup2()");
+
+		clearerr(stdout);
+		close(sd);
+		sd = NOTOK;
+	} else
+		fclose(stdout);
+
+	pidwait(m_pid, OK);
+	m_pid = NOTOK;
+}