From: Iain Patterson <me@iain.cx>
Date: Tue, 30 Jul 2013 21:39:40 +0000 (+0100)
Subject: Fixed missing io.cpp and io.h.
X-Git-Tag: v2.17~11
X-Git-Url: http://git.iain.cx/?a=commitdiff_plain;h=e1550b15c5975d9554a175033a35d89645be2b76;p=nssm.git

Fixed missing io.cpp and io.h.

The files were inadvertently not pushed along with the stream
redirection code.

Thanks Runner Mei.
---

diff --git a/io.cpp b/io.cpp
new file mode 100644
index 0000000..d692a4d
--- /dev/null
+++ b/io.cpp
@@ -0,0 +1,147 @@
+#include "nssm.h"
+
+/* Get path, share mode, creation disposition and flags for a stream. */
+int get_createfile_parameters(HKEY key, char *prefix, char *path, unsigned long *sharing, unsigned long default_sharing, unsigned long *disposition, unsigned long default_disposition, unsigned long *flags, unsigned long default_flags) {
+  char value[NSSM_STDIO_LENGTH];
+
+  /* Path. */
+  if (_snprintf(value, sizeof(value), "%s", prefix) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, prefix, "get_createfile_parameters()", 0);
+    return 1;
+  }
+  switch (expand_parameter(key, value, path, MAX_PATH, true, false)) {
+    case 0: if (! path[0]) return 0; break; /* OK. */
+    default: return 2; /* Error. */
+  }
+
+  /* ShareMode. */
+  if (_snprintf(value, sizeof(value), "%s%s", prefix, NSSM_REG_STDIO_SHARING) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_SHARING, "get_createfile_parameters()", 0);
+    return 3;
+  }
+  switch (get_number(key, value, sharing, false)) {
+    case 0: *sharing = default_sharing; break; /* Missing. */
+    case 1: break; /* Found. */
+    case -2: return 4; break; /* Error. */
+  }
+
+  /* CreationDisposition. */
+  if (_snprintf(value, sizeof(value), "%s%s", prefix, NSSM_REG_STDIO_DISPOSITION) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_DISPOSITION, "get_createfile_parameters()", 0);
+    return 5;
+  }
+  switch (get_number(key, value, disposition, false)) {
+    case 0: *disposition = default_disposition; break; /* Missing. */
+    case 1: break; /* Found. */
+    case -2: return 6; break; /* Error. */
+  }
+
+  /* Flags. */
+  if (_snprintf(value, sizeof(value), "%s%s", prefix, NSSM_REG_STDIO_FLAGS) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_FLAGS, "get_createfile_parameters()", 0);
+    return 7;
+  }
+  switch (get_number(key, value, flags, false)) {
+    case 0: *flags = default_flags; break; /* Missing. */
+    case 1: break; /* Found. */
+    case -2: return 8; break; /* Error. */
+  }
+
+  return 0;
+}
+
+HANDLE append_to_file(char *path, unsigned long sharing, SECURITY_ATTRIBUTES *attributes, unsigned long disposition, unsigned long flags) {
+  HANDLE ret;
+
+  /* Try to append to the file first. */
+  ret = CreateFile(path, FILE_APPEND_DATA, sharing, attributes, disposition, flags, 0);
+  if (ret) {
+    SetEndOfFile(ret);
+    return ret;
+  }
+
+  unsigned long error = GetLastError();
+  if (error != ERROR_FILE_NOT_FOUND) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, path, error_string(error));
+    return (HANDLE) 0;
+  }
+
+  /* It didn't exist.  Create it. */
+  return CreateFile(path, FILE_WRITE_DATA, sharing, attributes, disposition, flags, 0);
+}
+
+int get_output_handles(HKEY key, STARTUPINFO *si) {
+  char path[MAX_PATH];
+  char stdout_path[MAX_PATH];
+  unsigned long sharing, disposition, flags;
+  bool set_flags = false;
+
+  /* Standard security attributes allowing inheritance. */
+  SECURITY_ATTRIBUTES attributes;
+  ZeroMemory(&attributes, sizeof(attributes));
+  attributes.bInheritHandle = true;
+
+  /* stdin */
+  if (get_createfile_parameters(key, NSSM_REG_STDIN, path, &sharing, FILE_SHARE_WRITE, &disposition, OPEN_EXISTING, &flags, FILE_ATTRIBUTE_NORMAL)) return 1;
+  if (path[0]) {
+    si->hStdInput = CreateFile(path, FILE_READ_DATA, sharing, &attributes, disposition, flags, 0);
+    if (! si->hStdInput) {
+      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, path, error_string(GetLastError()));
+      return 2;
+    }
+    set_flags = true;
+  }
+
+  /* stdout */
+  if (get_createfile_parameters(key, NSSM_REG_STDOUT, path, &sharing, FILE_SHARE_READ | FILE_SHARE_WRITE, &disposition, OPEN_ALWAYS, &flags, FILE_ATTRIBUTE_NORMAL)) return 3;
+  if (path[0]) {
+    /* Remember path for comparison with stderr. */
+    if (_snprintf(stdout_path, sizeof(stdout_path), "%s", path) < 0) {
+      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "stdout_path", "get_output_handles", 0);
+      return 4;
+    }
+
+    si->hStdOutput = append_to_file(path, sharing, &attributes, disposition, flags);
+    if (! si->hStdOutput) return 5;
+    set_flags = true;
+  }
+  else ZeroMemory(stdout_path, sizeof(stdout_path));
+
+  /* stderr */
+  if (get_createfile_parameters(key, NSSM_REG_STDERR, path, &sharing, FILE_SHARE_READ | FILE_SHARE_WRITE, &disposition, OPEN_ALWAYS, &flags, FILE_ATTRIBUTE_NORMAL)) return 6;
+  if (path[0]) {
+    /* Same as stdin? */
+    if (str_equiv(path, stdout_path)) {
+      /* Two handles to the same file will create a race. */
+      if (! DuplicateHandle(GetCurrentProcess(), si->hStdOutput, GetCurrentProcess(), &si->hStdError, 0, true, DUPLICATE_SAME_ACCESS)) {
+        log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DUPLICATEHANDLE_FAILED, NSSM_REG_STDOUT, error_string(GetLastError()));
+        return 7;
+      }
+    }
+    else {
+      si->hStdError = append_to_file(path, sharing, &attributes, disposition, flags);
+      if (! si->hStdError) {
+        log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, path, error_string(GetLastError()));
+        return 8;
+      }
+      SetEndOfFile(si->hStdError);
+    }
+    set_flags = true;
+  }
+
+  if (! set_flags) return 0;
+
+  /*
+    We need to set the startup_info flags to make the new handles
+    inheritable by the new process.
+  */
+  si->dwFlags |= STARTF_USESTDHANDLES;
+
+  return 0;
+}
+
+void close_output_handles(STARTUPINFO *si) {
+  if (si->hStdInput) CloseHandle(si->hStdInput);
+  if (si->hStdOutput) CloseHandle(si->hStdOutput);
+  if (si->hStdError) CloseHandle(si->hStdError);
+}
diff --git a/io.h b/io.h
new file mode 100644
index 0000000..f8fb256
--- /dev/null
+++ b/io.h
@@ -0,0 +1,9 @@
+#ifndef IO_H
+#define IO_H
+
+int get_createfile_parameters(HKEY, char *, char *, unsigned long *, unsigned long, unsigned long *, unsigned long, unsigned long *, unsigned long);
+HANDLE append_to_file(char *, unsigned long, SECURITY_ATTRIBUTES *, unsigned long, unsigned long);
+int get_output_handles(HKEY, STARTUPINFO *);
+void close_output_handles(STARTUPINFO *);
+
+#endif