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/*******************************************************************\ |
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|
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Copyright (C) 2004 Joseph Coffland |
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|
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This program is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License |
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as published by the Free Software Foundation; either version 2 |
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of the License, or (at your option) any later version. |
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|
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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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|
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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 |
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02111-1307, USA. |
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|
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For information regarding this software email |
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jcofflan@users.sourceforge.net |
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|
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\*******************************************************************/ |
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#include <protomol/debug/Process.h> |
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|
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#include <protomol/base/Exception.h> |
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#include <protomol/debug/Debugger.h> |
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#include <protomol/debug/Pipe.h> |
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#include <protomol/type/String.h> |
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#include <protomol/base/Zap.h> |
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|
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#include <stdio.h> |
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#include <unistd.h> |
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#include <sys/types.h> |
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#include <sys/wait.h> |
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#include <signal.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <string> |
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|
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using namespace std; |
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using namespace ProtoMol; |
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|
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void PipeProcessFunctor::child() { |
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if (direction == Process::TO_CHILD) { |
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pipe.closeIn(); |
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if (fd >= 0) pipe.moveOutFD(fd); |
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} else { |
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pipe.closeOut(); |
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if (fd >= 0) pipe.moveInFD(fd); |
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} |
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} |
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|
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void PipeProcessFunctor::parent() { |
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if (direction == Process::TO_CHILD) pipe.closeOut(); |
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else pipe.closeIn(); |
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} |
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|
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void FDReplaceProcessFunctor::child() { |
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if (dup2(replacement, fd) != fd) |
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THROW("Error replacing file descriptor in child process!"); |
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} |
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|
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Process::Process() : |
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pid(0), running(false), returnCode(0) {} |
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|
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Process::~Process() { |
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if (isRunning()) { |
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kill(SIGHUP); |
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wait(); |
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} |
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|
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for (unsigned int i = 0; i < functors.size(); i++) |
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delete functors[i]; |
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} |
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|
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void Process::exec(list<string> &args) { |
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SmartPointer<char *>::Array argv = new char *[args.size() + 1]; |
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list<string>::iterator it; |
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unsigned int i = 0; |
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|
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for (i = 0, it = args.begin(); it != args.end(); i++, it++) |
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argv[i] = (char *)it->c_str(); |
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|
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argv[i] = 0; |
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|
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exec(argv.get()); |
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} |
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|
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void Process::exec(const char *args) { |
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SmartPointer<char, SP_MALLOC> tmp = strdup(args); |
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exec(tmp.get()); |
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} |
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|
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void Process::exec(char *args) { |
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char *argv[256]; |
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int argc = 0; |
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|
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parseArgs(args, argc, argv, 256); |
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exec(argv); |
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} |
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|
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void Process::exec(char *argv[]) { |
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ASSERT_OR_THROW("Process all ready running!", !isRunning()); |
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|
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pid = fork(); |
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|
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if (pid == 0) { |
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try { |
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for (unsigned int i = 0; i < functors.size(); i++) |
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functors[i]->child(); |
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} catch (const Exception &e) { |
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perror(e.getMessage().c_str()); |
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} |
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|
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execvp(argv[0], argv); |
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|
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// Execution failed! |
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string errorStr = "Process() executing '"; |
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for (unsigned i = 0; argv[i]; i++) { |
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if (i) errorStr += " "; |
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errorStr += argv[i]; |
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} |
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|
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errorStr += "'"; |
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|
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perror(errorStr.c_str()); |
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exit(1); |
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} else if (pid == -1) |
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THROW("Failed to spawn child!"); |
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|
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running = true; |
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|
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for (unsigned int i = 0; i < functors.size(); i++) |
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functors[i]->parent(); |
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} |
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|
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void Process::parseArgs(char *args, int &argc, char *argv[], int n) { |
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if (args) { |
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bool inArg = false; |
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bool inSQuote = false; |
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bool inDQuote = false; |
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bool addChar; |
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int i = 0; |
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|
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for (char *ptr = args; *ptr; ptr++) { |
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addChar = false; |
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|
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switch (*ptr) { |
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case '\\': |
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if (ptr[1] != '\0') { |
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ptr++; |
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switch (*ptr) { |
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case 'n': *ptr = '\n'; |
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break; |
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case 't': *ptr = '\t'; |
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break; |
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case 'r': *ptr = '\r'; |
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break; |
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default: break; |
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} |
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|
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addChar = true; |
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} |
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break; |
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|
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case '\'': |
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if (inDQuote) addChar = true; |
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else |
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if (inSQuote) inSQuote = false; |
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else inSQuote = true; |
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break; |
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|
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case '"': |
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if (inSQuote) addChar = true; |
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else |
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if (inDQuote) inDQuote = false; |
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else inDQuote = true; |
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break; |
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|
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case '\t': |
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case ' ': |
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case '\n': |
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case '\r': |
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if (inArg) { |
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if (inSQuote || inDQuote) addChar = true; |
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else { |
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args[i++] = 0; |
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inArg = false; |
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} |
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} |
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break; |
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|
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default: addChar = true; |
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break; |
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} |
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|
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if (addChar) { |
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if (!inArg) { |
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ASSERT_OR_THROW("Too many arguments!", argc < n - 1); |
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argv[argc++] = &args[i]; |
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inArg = true; |
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} |
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args[i++] = *ptr; |
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} |
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} |
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if (inArg) args[i] = 0; |
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} |
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argv[argc] = 0; |
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} |
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|
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Pipe *Process::getChildPipe(dir_t dir, int childFD) { |
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ASSERT_OR_THROW("Process all ready running!", !running); |
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|
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PipeProcessFunctor *functor = new PipeProcessFunctor(dir, childFD); |
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functors.push_back(functor); |
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|
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return functor->getPipe(); |
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} |
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|
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void Process::replaceChildFD(int fd, int replacement) { |
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functors.push_back(new FDReplaceProcessFunctor(fd, replacement)); |
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} |
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|
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void Process::kill(int sig) { |
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ASSERT_OR_THROW("Process not running!", running); |
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|
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if (::kill(pid, sig) != 0) |
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THROW(string("Failed to kill process ") + String(pid) + ":" + |
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strerror(errno)); |
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} |
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|
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int Process::wait(int options) { |
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ASSERT_OR_THROW("Process not running!", running); |
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|
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int status = 0; |
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int retVal = waitpid(pid, &status, options); |
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|
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if (retVal == -1) { |
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running = false; |
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THROW(string("Failed to wait on process ") + String(pid) + ":" + |
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strerror(errno)); |
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} |
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|
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if (retVal) { |
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if (WIFEXITED(status)) { |
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returnCode = WEXITSTATUS(status); |
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running = false; |
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} else if (WIFSIGNALED(status)) |
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// TODO report on signal |
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running = false; |
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} |
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|
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return status; |
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} |
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|
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bool Process::isRunning() { |
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if (running) wait(WNOHANG); |
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return running; |
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} |
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|
