111 lines
2.6 KiB
C
111 lines
2.6 KiB
C
/*
|
|
* $Id: prgbox.c,v 1.6 2011/03/02 09:59:26 tom Exp $
|
|
*
|
|
* prgbox.c -- implements the prg box
|
|
*
|
|
* Copyright 2011 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 as
|
|
* published by the Free Software Foundation; either version 2.1 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* 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>
|
|
|
|
/*
|
|
* 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];
|
|
int pid;
|
|
const char *argv[4];
|
|
|
|
if ((*type == 'r' || *type != 'w') && pipe(fd) == 0) {
|
|
switch (pid = 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.
|
|
*/
|
|
argv[0] = "sh";
|
|
argv[1] = "-c";
|
|
argv[2] = command;
|
|
argv[3] = NULL;
|
|
execvp("sh", (char **)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;
|
|
|
|
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);
|
|
|
|
return code;
|
|
}
|