Mercurial > jwe > octave
view liboctave/wrappers/octave-popen2.c @ 31122:46e15523ca06
perms.m: Small cleanups for Octave coding conventions (bug #60364)
* perms.m: Wrap long lines in documentation to < 80 characters. Change
output in documentation example to match what Octave actually produces.
Use true/false for boolean variable "unique_v" rather than 0/1. Cuddle
parentheses when doing indexing and use a space when calling a function.
Add FIXME notes requesting an explanation of the apparently complicated
algorithm being used for permutations and unque permutations.
Remove period at end of error() message text per Octave conventions.
Change BIST input validation to more precisely check error() message.
author | Rik <rik@octave.org> |
---|---|
date | Tue, 05 Jul 2022 08:57:15 -0700 |
parents | 796f54d4ddbf |
children |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 2016-2022 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // This file is part of Octave. // // Octave is free software: you can redistribute it and/or modify it // under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // Octave 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 General Public License for more details. // // You should have received a copy of the GNU General Public License // along with Octave; see the file COPYING. If not, see // <https://www.gnu.org/licenses/>. // //////////////////////////////////////////////////////////////////////// // It makes more sense to define octave_popen2 with the wrapper // functions than it does to try to provide wrappers for all the // individual functions and macros that it uses and that may be provided // by gnulib. We don't include gnulib headers directly in Octave's C++ // source files to avoid problems that may be caused by the way that // gnulib overrides standard library functions. #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #if defined (__WIN32__) && ! defined (__CYGWIN__) # include <fcntl.h> # include <io.h> # define WIN32_LEAN_AND_MEAN 1 # include <windows.h> # include "uniconv-wrappers.h" #else # include <errno.h> # include <fcntl.h> # include <sys/types.h> # include <unistd.h> #endif #include "octave-popen2.h" #if defined (__WIN32__) && ! defined (__CYGWIN__) static char * make_command_string (const char *cmd, char *const *args) { char *const *argp; size_t cmd_len; char *command; // Count Command length, quotes, and terminating NUL character. cmd_len = strlen (cmd) + 3; // Count argument length, space, and quotes. // Ignore first arg as it is the command. argp = args; while (*++argp) cmd_len += strlen (*argp) + 3; command = (char *) malloc (cmd_len); sprintf (command, "\"%s\"", cmd); argp = args; while (*++argp) sprintf (command, "%s \"%s\"", command, *argp); return command; } pid_t octave_popen2 (const char *cmd, char *const *args, bool sync_mode, int *fildes, const char **errmsg) { pid_t pid; char *command; bool status; PROCESS_INFORMATION pi; STARTUPINFO si; HANDLE hProcess = GetCurrentProcess (); HANDLE childRead, childWrite, parentRead, parentWrite; DWORD pipeMode; ZeroMemory (&pi, sizeof (pi)); ZeroMemory (&si, sizeof (si)); si.cb = sizeof (si); if (! CreatePipe (&childRead, &parentWrite, 0, 0) || ! DuplicateHandle (hProcess, childRead, hProcess, &childRead, 0, TRUE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE)) { *errmsg = "popen2: pipe creation failed"; return -1; } if (! CreatePipe (&parentRead, &childWrite, 0, 0) || ! DuplicateHandle (hProcess, childWrite, hProcess, &childWrite, 0, TRUE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE)) { *errmsg = "popen2: pipe creation failed"; return -1; } if (! sync_mode) { pipeMode = PIPE_NOWAIT; SetNamedPipeHandleState (parentRead, &pipeMode, 0, 0); } fildes[1] = _open_osfhandle ((intptr_t) parentRead, _O_RDONLY | _O_BINARY); fildes[0] = _open_osfhandle ((intptr_t) parentWrite, _O_WRONLY | _O_BINARY); si.dwFlags |= STARTF_USESTDHANDLES; si.hStdInput = childRead; si.hStdOutput = childWrite; si.hStdError = GetStdHandle (STD_ERROR_HANDLE); command = make_command_string (cmd, args); wchar_t *wcmd = u8_to_wchar (command); free (command); status = CreateProcessW (NULL, wcmd, NULL, NULL, TRUE, CREATE_NO_WINDOW, NULL, NULL, &si, &pi); free (wcmd); if (! status) { *errmsg = "popen2: process creation failed"; return -1; } pid = pi.dwProcessId; CloseHandle (childRead); CloseHandle (childWrite); CloseHandle (pi.hProcess); CloseHandle (pi.hThread); return pid; } #else pid_t octave_popen2 (const char *cmd, char *const *args, bool sync_mode, int *fildes, const char **errmsg) { pid_t pid; int child_stdin[2], child_stdout[2]; if (pipe (child_stdin) < 0) { *errmsg = strerror (errno); return -1; } if (pipe (child_stdout) < 0) { close (child_stdin[0]); close (child_stdin[1]); *errmsg = strerror (errno); return -1; } pid = fork (); if (pid == 0) { // Child process close (child_stdin[1]); close (child_stdout[0]); if (dup2 (child_stdin[0], STDIN_FILENO) >= 0) { close (child_stdin[0]); if (dup2 (child_stdout[1], STDOUT_FILENO) >= 0) { close (child_stdout[1]); if (execvp (cmd, args) < 0) perror ("popen2 (child)"); } else perror ("popen2 (child)"); } else perror ("popen2 (child)"); _exit (127); } else if (pid > 0) { // Parent process close (child_stdin[0]); close (child_stdout[1]); #if defined (F_SETFL) && defined (O_NONBLOCK) if (! sync_mode && fcntl (child_stdout[0], F_SETFL, O_NONBLOCK) < 0) { *errmsg = strerror (errno); return -1; } else #endif { fildes[0] = child_stdin[1]; fildes[1] = child_stdout[0]; return pid; } } *errmsg = "foobar!"; *errmsg = strerror (errno); return pid; } #endif