1 files changed, 117 insertions, 0 deletions
diff --git a/contrib/dialog/prgbox.c b/contrib/dialog/prgbox.c
new file mode 100644
index 0000000..cbb1458
--- /dev/null
+++ b/contrib/dialog/prgbox.c
@@ -0,0 +1,117 @@
+/*
+ *  $Id: prgbox.c,v 1.9 2012/12/02 23:40:30 tom Exp $
+ *
+ *  prgbox.c -- implements the prg box
+ *
+ *  Copyright 2011,2012	Thomas E. Dickey
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License, version 2.1
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this program; if not, write to
+ *	Free Software Foundation, Inc.
+ *	51 Franklin St., Fifth Floor
+ *	Boston, MA 02110, USA.
+ */
+
+#include <dialog.h>
+
+static void
+reapchild(int sig)
+{
+    (void) sig;
+}
+
+/*
+ * Open a pipe which ties stderr and stdout together.
+ */
+static FILE *
+dlg_popen(const char *command, const char *type)
+{
+    FILE *result = 0;
+    int fd[2];
+    char *blob;
+    char **argv;
+
+    if ((*type == 'r' || *type != 'w') && pipe(fd) == 0) {
+	switch (fork()) {
+	case -1:		/* Error. */
+	    (void) close(fd[0]);
+	    (void) close(fd[1]);
+	    break;
+	case 0:		/* child. */
+	    if (*type == 'r') {
+		if (fd[1] != STDOUT_FILENO) {
+		    (void) dup2(fd[1], STDOUT_FILENO);
+		    (void) close(fd[1]);
+		}
+		(void) dup2(STDOUT_FILENO, STDERR_FILENO);
+		(void) close(fd[0]);
+	    } else {
+		if (fd[0] != STDIN_FILENO) {
+		    (void) dup2(fd[0], STDIN_FILENO);
+		    (void) close(fd[0]);
+		}
+		(void) close(fd[1]);
+		(void) close(STDERR_FILENO);
+	    }
+	    /*
+	     * Bourne shell needs "-c" option to force it to use only the
+	     * given command.  Also, it needs the command to be parsed into
+	     * tokens.
+	     */
+	    if ((blob = malloc(4 + strlen(command))) != 0) {
+		sprintf(blob, "-c %s", command);
+		argv = dlg_string_to_argv(blob);
+		execvp("sh", argv);
+	    }
+	    _exit(127);
+	    /* NOTREACHED */
+	default:		/* parent */
+	    if (*type == 'r') {
+		result = fdopen(fd[0], type);
+		(void) close(fd[1]);
+	    } else {
+		result = fdopen(fd[1], type);
+		(void) close(fd[0]);
+	    }
+	    break;
+	}
+    }
+
+    return result;
+}
+
+/*
+ * Display text from a pipe in a scrolling window.
+ */
+int
+dialog_prgbox(const char *title,
+	      const char *cprompt,
+	      const char *command,
+	      int height,
+	      int width,
+	      int pauseopt)
+{
+    int code;
+    FILE *fp;
+    void (*oldreaper) (int) = signal(SIGCHLD, reapchild);
+
+    fp = dlg_popen(command, "r");
+    if (fp == NULL)
+	dlg_exiterr("pipe open failed: %s", command);
+
+    code = dlg_progressbox(title, cprompt, height, width, pauseopt, fp);
+
+    pclose(fp);
+    signal(SIGCHLD, oldreaper);
+
+    return code;
+}