Mercurial > octave
view liboctave/system/oct-syscalls.cc @ 21910:4d723ba06b4a
provide wrappers for some unistd.h functions
* liboctave/wrappers/unistd-wrappers.c,
liboctave/wrappers/unistd-wrappers.h: New files.
* liboctave/wrappers/module.mk: Update.
* gl2ps-print.cc, oct-hist.cc, oct-procbuf.cc, oct-tex-lexer.in.ll,
sysdep.cc, octave.cc, parse-tree/lex.ll, file-ops.cc, lo-sysdep.cc,
oct-env.cc, oct-syscalls.cc, cmd-edit.cc, kpse.cc:
Use wrappers instead of calling unistd.h functions directly.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 14 Jun 2016 18:10:04 -0400 |
parents | 590c39b94618 |
children | c66c156e1d1d |
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/* Copyright (C) 1996-2015 John W. Eaton 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 <http://www.gnu.org/licenses/>. */ #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include <cerrno> #include <cstdlib> #include <string.h> #include <fcntl.h> // We can't use csignal as kill is not in the std namespace, and picky // compiler runtimes will also exclude it from global scope as well. #include <signal.h> #include "lo-utils.h" #include "lo-sysdep.h" #include "oct-syscalls.h" #include "str-vec.h" #include "unistd-wrappers.h" #define NOT_SUPPORTED(nm) \ nm ": not supported on this system" namespace octave { namespace sys { int dup2 (int old_fd, int new_fd) { std::string msg; return octave::sys::dup2 (old_fd, new_fd, msg); } int dup2 (int old_fd, int new_fd, std::string& msg) { msg = ""; int status = -1; status = octave_dup2_wrapper (old_fd, new_fd); if (status < 0) msg = gnulib::strerror (errno); return status; } int execvp (const std::string& file, const string_vector& argv) { std::string msg; return octave::sys::execvp (file, argv, msg); } int execvp (const std::string& file, const string_vector& args, std::string& msg) { msg = ""; char **argv = args.c_str_vec (); int status = octave_execvp_wrapper (file.c_str (), argv); string_vector::delete_c_str_vec (argv); if (status < 0) msg = gnulib::strerror (errno); return status; } pid_t fork (std::string& msg) { pid_t status = -1; #if defined (HAVE_FORK) status = octave_fork_wrapper (); if (status < 0) msg = gnulib::strerror (errno); #else msg = NOT_SUPPORTED ("vfork"); #endif return status; } pid_t vfork (std::string& msg) { pid_t status = -1; #if defined (HAVE_VFORK) || defined (HAVE_FORK) # if defined (HAVE_VFORK) status = octave_vfork_wrapper (); # else status = octave_fork_wrapper (); # endif if (status < 0) msg = gnulib::strerror (errno); #else msg = NOT_SUPPORTED ("vfork"); #endif return status; } pid_t getpgrp (std::string& msg) { pid_t status = octave_getpgrp_wrapper (); if (status < 0) msg = gnulib::strerror (errno); return status; } pid_t getpid (void) { return octave_getpid_wrapper (); } pid_t getppid (void) { return octave_getppid_wrapper (); } gid_t getgid (void) { return octave_getgid_wrapper (); } gid_t getegid (void) { return octave_getegid_wrapper (); } uid_t getuid (void) { return octave_getuid_wrapper (); } uid_t geteuid (void) { return octave_geteuid_wrapper (); } int pipe (int *fildes) { std::string msg; return octave::sys::pipe (fildes, msg); } int pipe (int *fildes, std::string& msg) { msg = ""; int status = -1; status = octave_pipe_wrapper (fildes); if (status < 0) msg = gnulib::strerror (errno); return status; } pid_t waitpid (pid_t pid, int *status, int options) { std::string msg; return octave::sys::waitpid (pid, status, options, msg); } pid_t waitpid (pid_t pid, int *status, int options, std::string& msg) { pid_t retval = -1; msg = ""; #if defined (HAVE_WAITPID) retval = ::octave_waitpid (pid, status, options); if (retval < 0) msg = gnulib::strerror (errno); #else msg = NOT_SUPPORTED ("waitpid"); #endif return retval; } int kill (pid_t pid, int sig) { std::string msg; return octave::sys::kill (pid, sig, msg); } int kill (pid_t pid, int sig, std::string& msg) { msg = ""; int status = -1; #if defined (HAVE_KILL) status = ::kill (pid, sig); if (status < 0) msg = gnulib::strerror (errno); #else msg = NOT_SUPPORTED ("kill"); #endif return status; } pid_t popen2 (const std::string& cmd, const string_vector& args, bool sync_mode, int *fildes) { std::string msg; bool interactive = false; return octave::sys::popen2 (cmd, args, sync_mode, fildes, msg, interactive); } pid_t popen2 (const std::string& cmd, const string_vector& args, bool sync_mode, int *fildes, std::string& msg) { bool interactive = false; return octave::sys::popen2 (cmd, args, sync_mode, fildes, msg, interactive); } pid_t popen2 (const std::string& cmd, const string_vector& args, bool sync_mode, int *fildes, std::string& msg, bool &interactive) { #if defined (__WIN32__) && ! defined (__CYGWIN__) return octave::sys::win_popen2 (cmd, args, sync_mode, fildes, msg); #else pid_t pid; int child_stdin[2], child_stdout[2]; if (pipe (child_stdin, msg) == 0) { if (pipe (child_stdout, msg) == 0) { pid = fork (msg); if (pid < 0) msg = "popen2: process creation failed -- " + msg; else if (pid == 0) { std::string child_msg; interactive = false; // Child process octave_close_wrapper (child_stdin[1]); octave_close_wrapper (child_stdout[0]); if (dup2 (child_stdin[0], octave_stdin_fileno ()) >= 0) { octave_close_wrapper (child_stdin[0]); if (dup2 (child_stdout[1], octave_stdout_fileno ()) >= 0) { octave_close_wrapper (child_stdout[1]); if (execvp (cmd, args, child_msg) < 0) child_msg = "popen2 (child): unable to start process -- " + child_msg; } else child_msg = "popen2 (child): file handle duplication failed -- " + child_msg; } else child_msg = "popen2 (child): file handle duplication failed -- " + child_msg; (*current_liboctave_error_handler) (child_msg.c_str ()); exit (0); } else { // Parent process octave_close_wrapper (child_stdin[0]); octave_close_wrapper (child_stdout[1]); #if defined (F_SETFL) && defined (O_NONBLOCK) if (! sync_mode && octave::sys::fcntl (child_stdout[0], F_SETFL, O_NONBLOCK, msg) < 0) msg = "popen2: error setting file mode -- " + msg; else #endif { fildes[0] = child_stdin[1]; fildes[1] = child_stdout[0]; return pid; } } octave_close_wrapper (child_stdout[0]); octave_close_wrapper (child_stdout[1]); } else msg = "popen2: pipe creation failed -- " + msg; octave_close_wrapper (child_stdin[0]); octave_close_wrapper (child_stdin[1]); } else msg = "popen2: pipe creation failed -- " + msg; return -1; #endif } int fcntl (int fd, int cmd, long arg) { std::string msg; return octave::sys::fcntl (fd, cmd, arg, msg); } int fcntl (int fd, int cmd, long arg, std::string& msg) { msg = ""; int status = -1; status = gnulib::fcntl (fd, cmd, arg); if (status < 0) msg = gnulib::strerror (errno); return status; } } }