mirror of
https://github.com/fish-shell/fish-shell.git
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572 lines
13 KiB
C++
572 lines
13 KiB
C++
/*
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Copyright (C) 2005-2008 Axel Liljencrantz
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/** \file fish.c
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The main loop of <tt>fish</tt>.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <unistd.h>
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#include <termios.h>
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#include <fcntl.h>
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#include <sys/param.h>
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#ifdef HAVE_GETOPT_H
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#include <getopt.h>
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#endif
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#include <locale.h>
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#include <signal.h>
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#include "fallback.h"
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#include "util.h"
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#include "common.h"
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#include "reader.h"
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#include "builtin.h"
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#include "function.h"
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#include "complete.h"
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#include "wutil.h"
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#include "env.h"
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#include "sanity.h"
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#include "proc.h"
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#include "parser.h"
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#include "expand.h"
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#include "intern.h"
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#include "exec.h"
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#include "event.h"
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#include "output.h"
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#include "history.h"
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#include "path.h"
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/* PATH_MAX may not exist */
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#ifndef PATH_MAX
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#define PATH_MAX 1024
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#endif
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/**
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The string describing the single-character options accepted by the main fish binary
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*/
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#define GETOPT_STRING "+hilnvc:p:d:"
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static bool has_suffix(const std::string &path, const char *suffix, bool ignore_case)
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{
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size_t pathlen = path.size(), suffixlen = strlen(suffix);
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return pathlen >= suffixlen && ! (ignore_case ? strcasecmp : strcmp)(path.c_str() + pathlen - suffixlen, suffix);
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}
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/* Modifies the given path by calling realpath. Returns true if realpath succeeded, false otherwise */
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static bool get_realpath(std::string &path)
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{
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char buff[PATH_MAX], *ptr;
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if ((ptr = realpath(path.c_str(), buff)))
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{
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path = ptr;
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}
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return ptr != NULL;
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}
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/* OS X function for getting the executable path */
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extern "C" {
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int _NSGetExecutablePath(char* buf, uint32_t* bufsize);
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}
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/* Return the path to the current executable. This needs to be realpath'd. */
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static std::string get_executable_path(const char *argv0)
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{
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char buff[PATH_MAX];
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#if __APPLE__
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{
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/* Returns 0 on success, -1 if the buffer is too small */
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uint32_t buffSize = sizeof buff;
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if (0 == _NSGetExecutablePath(buff, &buffSize))
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return std::string(buff);
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/* Loop until we're big enough */
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char *mbuff = (char *)malloc(buffSize);
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while (0 > _NSGetExecutablePath(mbuff, &buffSize))
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mbuff = (char *)realloc(mbuff, buffSize);
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/* Return the string */
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std::string result = mbuff;
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free(mbuff);
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return result;
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}
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#endif
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{
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/* On other Unixes, try /proc directory. This might be worth breaking out into macros. */
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if (0 < readlink("/proc/self/exe", buff, sizeof buff) || // Linux
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0 < readlink("/proc/curproc/file", buff, sizeof buff) || // BSD
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0 < readlink("/proc/self/path/a.out", buff, sizeof buff)) // Solaris
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{
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return std::string(buff);
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}
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}
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/* Just return argv0, which probably won't work (i.e. it's not an absolute path or a path relative to the working directory, but instead something the caller found via $PATH). We'll eventually fall back to the compile time paths. */
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return std::string(argv0 ? argv0 : "");
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}
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static struct config_paths_t determine_config_directory_paths(const char *argv0)
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{
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struct config_paths_t paths;
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bool done = false;
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std::string exec_path = get_executable_path(argv0);
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if (get_realpath(exec_path))
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{
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#if __APPLE__
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/* On OS X, maybe we're an app bundle, and should use the bundle's files. Since we don't link CF, use this lame approach to test it: see if the resolved path ends with /Contents/MacOS/fish, case insensitive since HFS+ usually is.
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*/
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if (! done)
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{
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const char *suffix = "/Contents/MacOS/fish";
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const size_t suffixlen = strlen(suffix);
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if (has_suffix(exec_path, suffix, true))
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{
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/* Looks like we're a bundle. Cut the string at the / prefixing /Contents... and then the rest */
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wcstring wide_resolved_path = str2wcstring(exec_path);
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wide_resolved_path.resize(exec_path.size() - suffixlen);
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wide_resolved_path.append(L"/Contents/Resources/");
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/* Append share, etc, doc */
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paths.data = wide_resolved_path + L"share/fish";
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paths.sysconf = wide_resolved_path + L"etc/fish";
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paths.doc = wide_resolved_path + L"doc/fish";
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/* But the bin_dir is the resolved_path, minus fish (aka the MacOS directory) */
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paths.bin = str2wcstring(exec_path);
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paths.bin.resize(paths.bin.size() - strlen("/fish"));
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done = true;
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}
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}
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#endif
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if (! done)
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{
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/* The next check is that we are in a reloctable directory tree like this:
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bin/fish
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etc/fish
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share/fish
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Check it!
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*/
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const char *suffix = "/bin/fish";
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if (has_suffix(exec_path, suffix, false))
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{
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wcstring base_path = str2wcstring(exec_path);
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base_path.resize(base_path.size() - strlen(suffix));
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paths.data = base_path + L"/share/fish";
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paths.sysconf = base_path + L"/etc/fish";
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paths.doc = base_path + L"/share/doc/fish";
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paths.bin = base_path + L"/bin";
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struct stat buf;
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if (0 == wstat(paths.data, &buf) && 0 == wstat(paths.sysconf, &buf))
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{
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done = true;
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}
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}
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}
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}
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if (! done)
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{
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/* Fall back to what got compiled in. */
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paths.data = L"" DATADIR "/fish";
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paths.sysconf = L"" SYSCONFDIR "/fish";
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paths.doc = L"" DATADIR "/doc/fish";
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paths.bin = L"" PREFIX "/bin";
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done = true;
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}
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return paths;
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}
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/**
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Parse init files. exec_path is the path of fish executable as determined by argv[0].
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*/
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static int read_init(const struct config_paths_t &paths)
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{
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parser_t &parser = parser_t::principal_parser();
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const io_chain_t empty_ios;
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parser.eval( L"builtin . " + paths.data + L"/config.fish 2>/dev/null", empty_ios, TOP );
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parser.eval( L"builtin . " + paths.sysconf + L"/config.fish 2>/dev/null", empty_ios, TOP );
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/*
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We need to get the configuration directory before we can source the user configuration file
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*/
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wcstring config_dir;
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/*
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If path_get_config returns false then we have no configuration directory
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and no custom config to load.
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*/
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if (path_get_config(config_dir))
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{
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wcstring config_dir_escaped = escape_string( config_dir, 1 );
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wcstring eval_buff = format_string(L"builtin . %ls/config.fish 2>/dev/null", config_dir_escaped.c_str());
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parser.eval( eval_buff, empty_ios, TOP );
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}
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return 1;
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}
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/**
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Parse the argument list, return the index of the first non-switch
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arguments.
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*/
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static int fish_parse_opt( int argc, char **argv, const char **cmd_ptr )
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{
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int my_optind;
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int force_interactive=0;
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while( 1 )
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{
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static struct option
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long_options[] =
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{
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{
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"command", required_argument, 0, 'c'
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}
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,
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{
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"debug-level", required_argument, 0, 'd'
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}
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,
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{
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"interactive", no_argument, 0, 'i'
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}
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,
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{
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"login", no_argument, 0, 'l'
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}
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,
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{
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"no-execute", no_argument, 0, 'n'
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}
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,
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{
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"profile", required_argument, 0, 'p'
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}
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,
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{
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"help", no_argument, 0, 'h'
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}
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,
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{
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"version", no_argument, 0, 'v'
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}
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,
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{
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0, 0, 0, 0
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}
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}
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;
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int opt_index = 0;
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int opt = getopt_long( argc,
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argv,
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GETOPT_STRING,
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long_options,
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&opt_index );
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if( opt == -1 )
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break;
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switch( opt )
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{
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case 0:
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{
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break;
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}
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case 'c':
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{
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*cmd_ptr = optarg;
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is_interactive_session = 0;
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break;
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}
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case 'd':
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{
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char *end;
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long tmp;
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errno = 0;
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tmp = strtol(optarg, &end, 10);
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if( tmp >= 0 && tmp <=10 && !*end && !errno )
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{
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debug_level = (int)tmp;
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}
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else
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{
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debug( 0, _(L"Invalid value '%s' for debug level switch"), optarg );
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exit_without_destructors(1);
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}
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break;
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}
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case 'h':
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{
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*cmd_ptr = "__fish_print_help fish";
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break;
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}
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case 'i':
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{
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force_interactive = 1;
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break;
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}
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case 'l':
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{
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is_login=1;
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break;
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}
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case 'n':
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{
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no_exec=1;
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break;
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}
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case 'p':
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{
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profile = optarg;
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break;
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}
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case 'v':
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{
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fwprintf( stderr,
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_(L"%s, version %s\n"),
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PACKAGE_NAME,
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PACKAGE_VERSION );
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exit_without_destructors( 0 );
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}
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case '?':
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{
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exit_without_destructors( 1 );
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}
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}
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}
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my_optind = optind;
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is_login |= (strcmp( argv[0], "-fish") == 0);
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/*
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We are an interactive session if we have not been given an
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explicit command to execute, _and_ stdin is a tty.
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*/
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is_interactive_session &= (*cmd_ptr == 0);
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is_interactive_session &= (my_optind == argc);
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is_interactive_session &= isatty(STDIN_FILENO);
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/*
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We are also an interactive session if we have are forced-
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*/
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is_interactive_session |= force_interactive;
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return my_optind;
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}
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/**
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Calls a bunch of init functions, parses the init files and then
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parses commands from stdin or files, depending on arguments
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*/
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static wcstring full_escape( const wchar_t *in )
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{
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wcstring out;
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for( ; *in; in++ )
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{
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if( *in < 32 )
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{
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append_format( out, L"\\x%.2x", *in );
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}
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else if( *in < 128 )
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{
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out.push_back(*in);
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}
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else if( *in < 65536 )
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{
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append_format( out, L"\\u%.4x", *in );
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}
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else
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{
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append_format( out, L"\\U%.8x", *in );
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}
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}
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return out;
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}
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extern int g_fork_count;
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int main( int argc, char **argv )
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{
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int res=1;
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const char *cmd=0;
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int my_optind=0;
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set_main_thread();
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setup_fork_guards();
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wsetlocale( LC_ALL, L"" );
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is_interactive_session=1;
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program_name=L"fish";
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//struct stat tmp;
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//stat("----------FISH_HIT_MAIN----------", &tmp);
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my_optind = fish_parse_opt( argc, argv, &cmd );
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/*
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No-exec is prohibited when in interactive mode
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*/
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if( is_interactive_session && no_exec)
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{
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debug( 1, _(L"Can not use the no-execute mode when running an interactive session") );
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no_exec = 0;
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}
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const struct config_paths_t paths = determine_config_directory_paths(argv[0]);
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proc_init();
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event_init();
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wutil_init();
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//parser_init();
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builtin_init();
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function_init();
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env_init(&paths);
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reader_init();
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history_init();
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parser_t &parser = parser_t::principal_parser();
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if (g_log_forks)
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printf("%d: g_fork_count: %d\n", __LINE__, g_fork_count);
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const io_chain_t empty_ios;
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if( read_init(paths) )
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{
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if( cmd != 0 )
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{
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wchar_t *cmd_wcs = str2wcs( cmd );
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res = parser.eval( cmd_wcs, empty_ios, TOP );
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free(cmd_wcs);
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reader_exit(0, 0);
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}
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else
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{
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if( my_optind == argc )
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{
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res = reader_read( STDIN_FILENO, empty_ios );
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}
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else
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{
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char **ptr;
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char *file = *(argv+(my_optind++));
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int i;
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int fd;
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wchar_t *rel_filename, *abs_filename;
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if( ( fd = open(file, O_RDONLY) ) == -1 )
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{
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wperror( L"open" );
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return 1;
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}
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// OK to not do this atomically since we cannot have gone multithreaded yet
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set_cloexec(fd);
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if( *(argv+my_optind))
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{
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wcstring sb;
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for( i=1,ptr = argv+my_optind; *ptr; i++, ptr++ )
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{
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if( i != 1 )
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sb.append( ARRAY_SEP_STR );
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sb.append( str2wcstring( *ptr ));
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}
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env_set( L"argv", sb.c_str(), 0 );
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}
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rel_filename = str2wcs( file );
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abs_filename = wrealpath( rel_filename, 0 );
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if( !abs_filename )
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{
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abs_filename = wcsdup(rel_filename);
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}
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reader_push_current_filename( intern( abs_filename ) );
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free( rel_filename );
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free( abs_filename );
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res = reader_read( fd, empty_ios );
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if( res )
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{
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debug( 1,
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_(L"Error while reading file %ls\n"),
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reader_current_filename()?reader_current_filename(): _(L"Standard input") );
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}
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reader_pop_current_filename();
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}
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}
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}
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proc_fire_event( L"PROCESS_EXIT", EVENT_EXIT, getpid(), res );
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history_destroy();
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proc_destroy();
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builtin_destroy();
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reader_destroy();
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parser.destroy();
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wutil_destroy();
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event_destroy();
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env_destroy();
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if (g_log_forks)
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printf("%d: g_fork_count: %d\n", __LINE__, g_fork_count);
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return res?STATUS_UNKNOWN_COMMAND:proc_get_last_status();
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}
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