3 /* Get path, share mode, creation disposition and flags for a stream. */
\r
4 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) {
\r
5 char value[NSSM_STDIO_LENGTH];
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8 if (_snprintf_s(value, sizeof(value), _TRUNCATE, "%s", prefix) < 0) {
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9 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, prefix, "get_createfile_parameters()", 0);
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12 switch (expand_parameter(key, value, path, MAX_PATH, true, false)) {
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13 case 0: if (! path[0]) return 0; break; /* OK. */
\r
14 default: return 2; /* Error. */
\r
18 if (_snprintf_s(value, sizeof(value), _TRUNCATE, "%s%s", prefix, NSSM_REG_STDIO_SHARING) < 0) {
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19 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_SHARING, "get_createfile_parameters()", 0);
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22 switch (get_number(key, value, sharing, false)) {
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23 case 0: *sharing = default_sharing; break; /* Missing. */
\r
24 case 1: break; /* Found. */
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25 case -2: return 4; break; /* Error. */
\r
28 /* CreationDisposition. */
\r
29 if (_snprintf_s(value, sizeof(value), _TRUNCATE, "%s%s", prefix, NSSM_REG_STDIO_DISPOSITION) < 0) {
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30 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_DISPOSITION, "get_createfile_parameters()", 0);
\r
33 switch (get_number(key, value, disposition, false)) {
\r
34 case 0: *disposition = default_disposition; break; /* Missing. */
\r
35 case 1: break; /* Found. */
\r
36 case -2: return 6; break; /* Error. */
\r
40 if (_snprintf_s(value, sizeof(value), _TRUNCATE, "%s%s", prefix, NSSM_REG_STDIO_FLAGS) < 0) {
\r
41 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_FLAGS, "get_createfile_parameters()", 0);
\r
44 switch (get_number(key, value, flags, false)) {
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45 case 0: *flags = default_flags; break; /* Missing. */
\r
46 case 1: break; /* Found. */
\r
47 case -2: return 8; break; /* Error. */
\r
53 HANDLE append_to_file(char *path, unsigned long sharing, SECURITY_ATTRIBUTES *attributes, unsigned long disposition, unsigned long flags) {
\r
56 /* Try to append to the file first. */
\r
57 ret = CreateFile(path, FILE_APPEND_DATA, sharing, attributes, disposition, flags, 0);
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63 unsigned long error = GetLastError();
\r
64 if (error != ERROR_FILE_NOT_FOUND) {
\r
65 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, path, error_string(error));
\r
69 /* It didn't exist. Create it. */
\r
70 return CreateFile(path, FILE_WRITE_DATA, sharing, attributes, disposition, flags, 0);
\r
73 int get_output_handles(HKEY key, STARTUPINFO *si) {
\r
74 char path[MAX_PATH];
\r
75 char stdout_path[MAX_PATH];
\r
76 unsigned long sharing, disposition, flags;
\r
77 bool set_flags = false;
\r
79 /* Standard security attributes allowing inheritance. */
\r
80 SECURITY_ATTRIBUTES attributes;
\r
81 ZeroMemory(&attributes, sizeof(attributes));
\r
82 attributes.bInheritHandle = true;
\r
85 if (get_createfile_parameters(key, NSSM_REG_STDIN, path, &sharing, FILE_SHARE_WRITE, &disposition, OPEN_EXISTING, &flags, FILE_ATTRIBUTE_NORMAL)) return 1;
\r
87 si->hStdInput = CreateFile(path, FILE_READ_DATA, sharing, &attributes, disposition, flags, 0);
\r
88 if (! si->hStdInput) {
\r
89 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, path, error_string(GetLastError()));
\r
96 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;
\r
98 /* Remember path for comparison with stderr. */
\r
99 if (_snprintf_s(stdout_path, sizeof(stdout_path), _TRUNCATE, "%s", path) < 0) {
\r
100 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "stdout_path", "get_output_handles", 0);
\r
104 si->hStdOutput = append_to_file(path, sharing, &attributes, disposition, flags);
\r
105 if (! si->hStdOutput) return 5;
\r
108 else ZeroMemory(stdout_path, sizeof(stdout_path));
\r
111 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;
\r
113 /* Same as stdin? */
\r
114 if (str_equiv(path, stdout_path)) {
\r
115 /* Two handles to the same file will create a race. */
\r
116 if (! DuplicateHandle(GetCurrentProcess(), si->hStdOutput, GetCurrentProcess(), &si->hStdError, 0, true, DUPLICATE_SAME_ACCESS)) {
\r
117 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DUPLICATEHANDLE_FAILED, NSSM_REG_STDOUT, error_string(GetLastError()));
\r
122 si->hStdError = append_to_file(path, sharing, &attributes, disposition, flags);
\r
123 if (! si->hStdError) {
\r
124 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, path, error_string(GetLastError()));
\r
127 SetEndOfFile(si->hStdError);
\r
132 if (! set_flags) return 0;
\r
135 We need to set the startup_info flags to make the new handles
\r
136 inheritable by the new process.
\r
138 si->dwFlags |= STARTF_USESTDHANDLES;
\r
143 void close_output_handles(STARTUPINFO *si) {
\r
144 if (si->hStdInput) CloseHandle(si->hStdInput);
\r
145 if (si->hStdOutput) CloseHandle(si->hStdOutput);
\r
146 if (si->hStdError) CloseHandle(si->hStdError);
\r