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https://review.haiku-os.org/haiku
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17ebe2b021
including also Haiku) using FIFOs instead of Unix sockets. Advantages: * Multiple FS shells can run concurrently, since they no longer need a unique address. * Killing/aborting the build_haiku_image script will automatically tear down the FS shell as well, so there shouldn't be any stray FS shell processes anymore. Hopefully also fixes #5498. So far only tested under Haiku. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40097 a95241bf-73f2-0310-859d-f6bbb57e9c96
76 lines
1.3 KiB
C++
76 lines
1.3 KiB
C++
/*
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* Copyright 2005-2010, Ingo Weinhold, ingo_weinhold@gmx.de.
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* Distributed under the terms of the MIT License.
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*/
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#include "external_commands.h"
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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static FILE*
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get_input()
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{
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static FILE* sInput = fdopen(3, "r");
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return sInput;
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}
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static FILE*
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get_output()
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{
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static FILE* sOutput = fdopen(4, "w");
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return sOutput;
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}
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bool
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FSShell::get_external_command(char* buffer, int size)
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{
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// get the input stream
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FILE* in = get_input();
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if (in == NULL) {
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fprintf(stderr, "Error: Failed to open command input: %s\n",
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strerror(errno));
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return false;
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}
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while (true) {
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// read a command line
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if (fgets(buffer, size, in) != NULL)
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return true;
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// when interrupted, try again
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if (errno != EINTR)
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return false;
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}
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}
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void
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FSShell::reply_to_external_command(int result)
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{
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// get the output stream
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FILE* out = get_output();
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if (out == NULL) {
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fprintf(stderr, "Error: Failed to open command output: %s\n",
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strerror(errno));
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return;
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}
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if (fprintf(out, "%d\n", result) < 0 || fflush(out) == EOF) {
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fprintf(stderr, "Error: Failed to write command reply to output reply: "
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"%s\n", strerror(errno));
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}
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}
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void
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FSShell::external_command_cleanup()
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{
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// The file will be closed automatically when the team exits.
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}
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