bf764fc982
dpv(3): dialog progress view library dpv(1): stream data from stdin or multiple paths with dialog progress view figpar(3): configuration file parsing library Reviews: D714 Reviewed by: jelischer, shurd Discussed at: MeetBSD California 2014 Vendor/Dev Summit Discussed on: -current MFC after: 21 days X-MFC-to: stable/10 stable/9
108 lines
3.5 KiB
C
108 lines
3.5 KiB
C
/*-
|
|
* Copyright (c) 2013-2014 Devin Teske <dteske@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <err.h>
|
|
#include <limits.h>
|
|
#include <spawn.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "util.h"
|
|
|
|
extern char **environ;
|
|
static char cmdbuf[CMDBUFMAX] = "";
|
|
static char shellcmd[PATH_MAX] = PATH_SHELL;
|
|
static char *shellcmd_argv[6] = {
|
|
shellcmd,
|
|
__DECONST(char *, "-c"),
|
|
cmdbuf,
|
|
__DECONST(char *, "--"),
|
|
shellcmd,
|
|
NULL,
|
|
};
|
|
|
|
/*
|
|
* Spawn a sh(1) command. Writes the resulting process ID to the pid_t pointed
|
|
* at by `pid'. Returns a file descriptor (int) suitable for writing data to
|
|
* the spawned command (data written to file descriptor is seen as standard-in
|
|
* by the spawned sh(1) command). Returns `-1' if unable to spawn command.
|
|
*
|
|
* If cmd contains a single "%s" sequence, replace it with label if non-NULL.
|
|
*/
|
|
int
|
|
shell_spawn_pipecmd(const char *cmd, const char *label, pid_t *pid)
|
|
{
|
|
int error;
|
|
int len;
|
|
posix_spawn_file_actions_t action;
|
|
#if SHELL_SPAWN_DEBUG
|
|
unsigned int i;
|
|
#endif
|
|
int stdin_pipe[2] = { -1, -1 };
|
|
|
|
/* Populate argument array */
|
|
if (label != NULL && fmtcheck(cmd, "%s") == cmd)
|
|
len = snprintf(cmdbuf, CMDBUFMAX, cmd, label);
|
|
else
|
|
len = snprintf(cmdbuf, CMDBUFMAX, "%s", cmd);
|
|
if (len >= CMDBUFMAX) {
|
|
warnx("%s:%d:%s: cmdbuf[%u] too small to hold cmd argument",
|
|
__FILE__, __LINE__, __func__, CMDBUFMAX);
|
|
return (-1);
|
|
}
|
|
|
|
/* Open a pipe to communicate with [X]dialog(1) */
|
|
if (pipe(stdin_pipe) < 0)
|
|
err(EXIT_FAILURE, "%s: pipe(2)", __func__);
|
|
|
|
/* Fork sh(1) process */
|
|
#if SHELL_SPAWN_DEBUG
|
|
fprintf(stderr, "%s: spawning `", __func__);
|
|
for (i = 0; shellcmd_argv[i] != NULL; i++) {
|
|
if (i == 0)
|
|
fprintf(stderr, "%s", shellcmd_argv[i]);
|
|
else if (i == 2)
|
|
fprintf(stderr, " '%s'", shellcmd_argv[i]);
|
|
else
|
|
fprintf(stderr, " %s", shellcmd_argv[i]);
|
|
}
|
|
fprintf(stderr, "'\n");
|
|
#endif
|
|
posix_spawn_file_actions_init(&action);
|
|
posix_spawn_file_actions_adddup2(&action, stdin_pipe[0], STDIN_FILENO);
|
|
posix_spawn_file_actions_addclose(&action, stdin_pipe[1]);
|
|
error = posix_spawnp(pid, shellcmd, &action,
|
|
(const posix_spawnattr_t *)NULL, shellcmd_argv, environ);
|
|
if (error != 0)
|
|
err(EXIT_FAILURE, "%s: posix_spawnp(3)", __func__);
|
|
|
|
return stdin_pipe[1];
|
|
}
|