summaryrefslogtreecommitdiff
path: root/Build/source/libs/libgnuw32/popen.c
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/libs/libgnuw32/popen.c')
-rw-r--r--Build/source/libs/libgnuw32/popen.c296
1 files changed, 296 insertions, 0 deletions
diff --git a/Build/source/libs/libgnuw32/popen.c b/Build/source/libs/libgnuw32/popen.c
new file mode 100644
index 00000000000..796a54eeecf
--- /dev/null
+++ b/Build/source/libs/libgnuw32/popen.c
@@ -0,0 +1,296 @@
+/* libc replacement functions for win32.
+
+Copyright (C) 1998, 99 Free Software Foundation, Inc.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/*
+ This does make sense only under WIN32.
+ Functions:
+ - popen() rewritten
+ - pclose() rewritten
+
+ FIXME :
+ - exit code ?
+ - check leaks.
+*/
+
+#include <win32lib.h>
+#include <errno.h>
+
+extern void free_cmd_pipe(char ***cmd_pipe, int nCmds);
+extern char *quote_args(char **argv);
+
+#undef _DEBUG
+
+#ifdef _DEBUG
+#define TRACE(x) x
+#else
+#define TRACE(x)
+#endif
+
+#define IS_DIRECTORY_SEP(c) IS_DIR_SEP(c)
+
+struct _popen_elt {
+ FILE *f; /* File stream returned */
+ HANDLE hp; /* Handle of associated process */
+ struct _popen_elt *next; /* Next list element */
+};
+
+static struct _popen_elt _z = { NULL, 0, &_z };
+static struct _popen_elt *_popen_list = &_z;
+
+static BOOL bCriticalSectionInitialized = FALSE;
+CRITICAL_SECTION thePopenCriticalSection;
+
+void __cdecl
+popen_cleanup(void)
+{
+ if (bCriticalSectionInitialized) {
+ DeleteCriticalSection(&thePopenCriticalSection);
+ }
+}
+
+FILE * __cdecl win32_popen (const char *cmd, const char *mode)
+{
+ STARTUPINFO si;
+ PROCESS_INFORMATION pi;
+ FILE *f = NULL;
+ int fno, i;
+ HANDLE child_in, child_out;
+ HANDLE father_in, father_out;
+ HANDLE father_in_dup, father_out_dup;
+ HANDLE current_pid;
+ int binary_mode;
+ char *new_cmd = NULL, *app_name = NULL;
+ struct _popen_elt *new_process;
+ BOOL read_mode, write_mode;
+ char ***cmd_pipe;
+ int nCmds;
+
+ /* Admittedly, the command interpreter will allways be found. */
+ if (cmd == NULL) {
+ TRACE(fprintf(stderr, "popen: (null) command.\n"));
+ return NULL;
+ }
+
+
+ cmd_pipe = parse_cmdline(cmd, NULL, NULL, &nCmds);
+
+ /* Allow only one command in the pipe */
+ if (nCmds != 1) {
+ /* Failed to find the command or malformed cmd */
+ TRACE(fprintf(stderr, "system: failed to find command.\n"));
+ return NULL;
+ }
+
+ /* First time, allow to call the command interpretor */
+ if (look_for_cmd(cmd_pipe[0][0], &app_name) == FALSE) {
+ /* releasing previous split */
+ free_cmd_pipe(cmd_pipe, nCmds);
+ TRACE(fprintf(stderr, "look for command: %s not found, concatenating comspec\n", app_name));
+ new_cmd = concatn(getenv("COMSPEC"), " /c ", cmd, NULL);
+ TRACE(fprintf(stderr, "new command is: %s\n", new_cmd));
+ cmd_pipe = parse_cmdline(new_cmd, NULL, NULL, &nCmds);
+ /* We don't need it anymore */
+ free(new_cmd);
+ if (look_for_cmd(cmd_pipe[0][0], &app_name) == FALSE) {
+ /* Failed to find the command or malformed cmd */
+ TRACE(fprintf(stderr, "system: failed to find command.\n"));
+ return NULL;
+ }
+ }
+
+ new_cmd = quote_args(cmd_pipe[0]);
+
+ TRACE(fprintf(stderr, "popen: app_name = %s\n", app_name));
+ TRACE(fprintf(stderr, "popen: cmd_line = %s\n", new_cmd));
+
+ current_pid = GetCurrentProcess();
+
+ ZeroMemory( &si, sizeof(STARTUPINFO) );
+ si.cb = sizeof(STARTUPINFO);
+ si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW ;
+ si.wShowWindow = /* 0 */ SW_HIDE ;
+ si.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
+ si.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
+ si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
+
+ binary_mode = (strchr(mode, 'b') ? _O_BINARY : _O_TEXT);
+
+ read_mode = (strchr(mode, 'r') != 0);
+ write_mode = (strchr(mode, 'w') != 0);
+
+ /* Opening the pipe for writing */
+ if (write_mode) {
+ binary_mode |= _O_WRONLY;
+ if (CreatePipe(&child_in, &father_out, NULL, 0) == FALSE) {
+ fprintf(stderr, "popen: error CreatePipe\n");
+ return NULL;
+ }
+
+ if (DuplicateHandle(current_pid, child_in,
+ current_pid, &father_in_dup,
+ 0, TRUE, DUPLICATE_SAME_ACCESS) == FALSE) {
+ fprintf(stderr, "popen: error DuplicateHandle father_out\n");
+ return NULL;
+ }
+ si.hStdInput = father_in_dup;
+
+ CloseHandle(child_in);
+ fno = _open_osfhandle((long)father_out, binary_mode);
+ f = _fdopen(fno, mode);
+ i = setvbuf( f, NULL, _IONBF, 0 );
+ }
+ /* Opening the pipe for reading */
+ else if (read_mode) {
+ binary_mode |= _O_RDONLY;
+ if (CreatePipe(&father_in, &child_out, NULL, 0) == FALSE) {
+ fprintf(stderr, "popen: error CreatePipe\n");
+ return NULL;
+ }
+ if (DuplicateHandle(current_pid, child_out,
+ current_pid, &father_out_dup,
+ 0, TRUE, DUPLICATE_SAME_ACCESS) == FALSE) {
+ fprintf(stderr, "popen: error DuplicateHandle father_in\n");
+ return NULL;
+ }
+ CloseHandle(child_out);
+ si.hStdOutput = father_out_dup;
+ fno = _open_osfhandle((long)father_in, binary_mode);
+ f = _fdopen(fno, mode);
+ i = setvbuf( f, NULL, _IONBF, 0 );
+ }
+ else {
+ fprintf(stderr, "popen: invalid mode %s\n", mode);
+ return NULL;
+ }
+
+ /* creating child process */
+ if (CreateProcess(app_name, /* pointer to name of executable module */
+ new_cmd, /* pointer to command line string */
+ NULL, /* pointer to process security attributes */
+ NULL, /* pointer to thread security attributes */
+ TRUE, /* handle inheritance flag */
+ 0, /* creation flags */
+ NULL, /* pointer to environment */
+ NULL, /* pointer to current directory */
+ &si, /* pointer to STARTUPINFO */
+ &pi /* pointer to PROCESS_INFORMATION */
+ ) == FALSE) {
+ fprintf(stderr, "popen: CreateProcess %x\n", GetLastError());
+ return NULL;
+ }
+
+ /* Only the process handle is needed, ignore errors */
+ CloseHandle(pi.hThread);
+
+ /* Closing the unnecessary part of the pipe */
+ if (read_mode) {
+ CloseHandle(father_out_dup);
+ }
+ else if (write_mode) {
+ CloseHandle(father_in_dup);
+ }
+
+ /* Add the pair (f, pi.hProcess) to the list */
+ if ((new_process = malloc(sizeof(struct _popen_elt))) == NULL) {
+ fprintf (stderr, "popen: malloc(new_process) error\n");
+ return NULL;
+ }
+
+ if (! bCriticalSectionInitialized) {
+ InitializeCriticalSection(&thePopenCriticalSection);
+ atexit(popen_cleanup);
+ bCriticalSectionInitialized = TRUE;
+ }
+
+ EnterCriticalSection(&thePopenCriticalSection);
+
+ /* Saving the FILE * pointer, access key for retrieving the process
+ handle later on */
+ new_process->f = f;
+ /* Saving the process handle */
+ new_process->hp = pi.hProcess;
+ /* Linking it to the list of popen() processes */
+ new_process->next = _popen_list;
+ _popen_list = new_process;
+
+ LeaveCriticalSection(&thePopenCriticalSection);
+
+ free_cmd_pipe(cmd_pipe, nCmds);
+
+ if (new_cmd) free(new_cmd);
+ if (app_name) free(app_name);
+
+ return f;
+}
+
+int __cdecl win32_pclose (FILE *f)
+{
+ HANDLE h;
+ struct _popen_elt *p, *q;
+ int exit_code;
+
+ EnterCriticalSection(&thePopenCriticalSection);
+
+ /* Look for f as the access key in the linked list */
+ for (q = NULL, p = _popen_list;
+ p != &_z && p->f != f;
+ q = p, p = p->next);
+
+ /* remove the elt from the list if found */
+ if (p != &_z) {
+ if (q != NULL)
+ q->next = p->next;
+ else
+ _popen_list = p->next;
+ /* remember the handle */
+ h = p->hp;
+ /* free up the block */
+ free(p);
+ }
+
+ LeaveCriticalSection(&thePopenCriticalSection);
+
+ if (p == &_z) {
+ fprintf(stderr, "pclose: error, file not found.");
+ return -1;
+ }
+
+ /* Closing the FILE pointer */
+ fclose(f);
+
+ /* Waiting for the process to terminate */
+ if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
+ fprintf(stderr, "pclose: error, process still active\n");
+ return -1;
+ }
+
+ /* retrieving the exit code */
+ if (GetExitCodeProcess(h, &exit_code) == 0) {
+ fprintf(stderr, "pclose: can't get process exit code\n");
+ return -1;
+ }
+
+ /* Closing the process handle, this will cause the system to
+ remove the process from memory */
+ if (CloseHandle(h) == FALSE) {
+ fprintf(stderr, "pclose: error closing process handle\n");
+ return -1;
+ }
+
+ return exit_code;
+}