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Diffstat (limited to 'w32/subproc/sub_proc.c')
-rw-r--r--w32/subproc/sub_proc.c2376
1 files changed, 1190 insertions, 1186 deletions
diff --git a/w32/subproc/sub_proc.c b/w32/subproc/sub_proc.c
index 281c81c..300bb7b 100644
--- a/w32/subproc/sub_proc.c
+++ b/w32/subproc/sub_proc.c
@@ -1,1186 +1,1190 @@
-#include <stdlib.h>
-#include <stdio.h>
-#include <process.h> /* for msvc _beginthreadex, _endthreadex */
-#include <windows.h>
-
-#include "sub_proc.h"
-#include "proc.h"
-#include "w32err.h"
-#include "config.h"
-
-static char *make_command_line( char *shell_name, char *exec_path, char **argv);
-
-typedef struct sub_process_t {
- int sv_stdin[2];
- int sv_stdout[2];
- int sv_stderr[2];
- int using_pipes;
- char *inp;
- DWORD incnt;
- char * volatile outp;
- volatile DWORD outcnt;
- char * volatile errp;
- volatile DWORD errcnt;
- int pid;
- int exit_code;
- int signal;
- long last_err;
- long lerrno;
-} sub_process;
-
-/* keep track of children so we can implement a waitpid-like routine */
-static sub_process *proc_array[256];
-static int proc_index = 0;
-static int fake_exits_pending = 0;
-
-/*
- * When a process has been waited for, adjust the wait state
- * array so that we don't wait for it again
- */
-static void
-process_adjust_wait_state(sub_process* pproc)
-{
- int i;
-
- if (!proc_index)
- return;
-
- for (i = 0; i < proc_index; i++)
- if (proc_array[i]->pid == pproc->pid)
- break;
-
- if (i < proc_index) {
- proc_index--;
- if (i != proc_index)
- memmove(&proc_array[i], &proc_array[i+1],
- (proc_index-i) * sizeof(sub_process*));
- proc_array[proc_index] = NULL;
- }
-}
-
-/*
- * Waits for any of the registered child processes to finish.
- */
-static sub_process *
-process_wait_for_any_private(void)
-{
- HANDLE handles[256];
- DWORD retval, which;
- int i;
-
- if (!proc_index)
- return NULL;
-
- /* build array of handles to wait for */
- for (i = 0; i < proc_index; i++) {
- handles[i] = (HANDLE) proc_array[i]->pid;
-
- if (fake_exits_pending && proc_array[i]->exit_code)
- break;
- }
-
- /* wait for someone to exit */
- if (!fake_exits_pending) {
- retval = WaitForMultipleObjects(proc_index, handles, FALSE, INFINITE);
- which = retval - WAIT_OBJECT_0;
- } else {
- fake_exits_pending--;
- retval = !WAIT_FAILED;
- which = i;
- }
-
- /* return pointer to process */
- if (retval != WAIT_FAILED) {
- sub_process* pproc = proc_array[which];
- process_adjust_wait_state(pproc);
- return pproc;
- } else
- return NULL;
-}
-
-/*
- * Terminate a process.
- */
-BOOL
-process_kill(HANDLE proc, int signal)
-{
- sub_process* pproc = (sub_process*) proc;
- pproc->signal = signal;
- return (TerminateProcess((HANDLE) pproc->pid, signal));
-}
-
-/*
- * Use this function to register processes you wish to wait for by
- * calling process_file_io(NULL) or process_wait_any(). This must be done
- * because it is possible for callers of this library to reuse the same
- * handle for multiple processes launches :-(
- */
-void
-process_register(HANDLE proc)
-{
- proc_array[proc_index++] = (sub_process *) proc;
-}
-
-/*
- * Public function which works kind of like waitpid(). Wait for any
- * of the children to die and return results. To call this function,
- * you must do 1 of things:
- *
- * x = process_easy(...);
- *
- * or
- *
- * x = process_init_fd();
- * process_register(x);
- *
- * or
- *
- * x = process_init();
- * process_register(x);
- *
- * You must NOT then call process_pipe_io() because this function is
- * not capable of handling automatic notification of any child
- * death.
- */
-
-HANDLE
-process_wait_for_any(void)
-{
- sub_process* pproc = process_wait_for_any_private();
-
- if (!pproc)
- return NULL;
- else {
- /*
- * Ouch! can't tell caller if this fails directly. Caller
- * will have to use process_last_err()
- */
- (void) process_file_io(pproc);
- return ((HANDLE) pproc);
- }
-}
-
-long
-process_errno(HANDLE proc)
-{
- return (((sub_process *)proc)->lerrno);
-}
-
-long
-process_signal(HANDLE proc)
-{
- return (((sub_process *)proc)->signal);
-}
-
- long
-process_last_err(HANDLE proc)
-{
- return (((sub_process *)proc)->last_err);
-}
-
- long
-process_exit_code(HANDLE proc)
-{
- return (((sub_process *)proc)->exit_code);
-}
-
- char *
-process_outbuf(HANDLE proc)
-{
- return (((sub_process *)proc)->outp);
-}
-
- char *
-process_errbuf(HANDLE proc)
-{
- return (((sub_process *)proc)->errp);
-}
-
- int
-process_outcnt(HANDLE proc)
-{
- return (((sub_process *)proc)->outcnt);
-}
-
- int
-process_errcnt(HANDLE proc)
-{
- return (((sub_process *)proc)->errcnt);
-}
-
- void
-process_pipes(HANDLE proc, int pipes[3])
-{
- pipes[0] = ((sub_process *)proc)->sv_stdin[0];
- pipes[1] = ((sub_process *)proc)->sv_stdout[0];
- pipes[2] = ((sub_process *)proc)->sv_stderr[0];
- return;
-}
-
-
- HANDLE
-process_init()
-{
- sub_process *pproc;
- /*
- * open file descriptors for attaching stdin/stdout/sterr
- */
- HANDLE stdin_pipes[2];
- HANDLE stdout_pipes[2];
- HANDLE stderr_pipes[2];
- SECURITY_ATTRIBUTES inherit;
- BYTE sd[SECURITY_DESCRIPTOR_MIN_LENGTH];
-
- pproc = malloc(sizeof(*pproc));
- memset(pproc, 0, sizeof(*pproc));
-
- /* We can't use NULL for lpSecurityDescriptor because that
- uses the default security descriptor of the calling process.
- Instead we use a security descriptor with no DACL. This
- allows nonrestricted access to the associated objects. */
-
- if (!InitializeSecurityDescriptor((PSECURITY_DESCRIPTOR)(&sd),
- SECURITY_DESCRIPTOR_REVISION)) {
- pproc->last_err = GetLastError();
- pproc->lerrno = E_SCALL;
- return((HANDLE)pproc);
- }
-
- inherit.nLength = sizeof(inherit);
- inherit.lpSecurityDescriptor = (PSECURITY_DESCRIPTOR)(&sd);
- inherit.bInheritHandle = TRUE;
-
- // By convention, parent gets pipe[0], and child gets pipe[1]
- // This means the READ side of stdin pipe goes into pipe[1]
- // and the WRITE side of the stdout and stderr pipes go into pipe[1]
- if (CreatePipe( &stdin_pipes[1], &stdin_pipes[0], &inherit, 0) == FALSE ||
- CreatePipe( &stdout_pipes[0], &stdout_pipes[1], &inherit, 0) == FALSE ||
- CreatePipe( &stderr_pipes[0], &stderr_pipes[1], &inherit, 0) == FALSE) {
-
- pproc->last_err = GetLastError();
- pproc->lerrno = E_SCALL;
- return((HANDLE)pproc);
- }
-
- //
- // Mark the parent sides of the pipes as non-inheritable
- //
- if (SetHandleInformation(stdin_pipes[0],
- HANDLE_FLAG_INHERIT, 0) == FALSE ||
- SetHandleInformation(stdout_pipes[0],
- HANDLE_FLAG_INHERIT, 0) == FALSE ||
- SetHandleInformation(stderr_pipes[0],
- HANDLE_FLAG_INHERIT, 0) == FALSE) {
-
- pproc->last_err = GetLastError();
- pproc->lerrno = E_SCALL;
- return((HANDLE)pproc);
- }
- pproc->sv_stdin[0] = (int) stdin_pipes[0];
- pproc->sv_stdin[1] = (int) stdin_pipes[1];
- pproc->sv_stdout[0] = (int) stdout_pipes[0];
- pproc->sv_stdout[1] = (int) stdout_pipes[1];
- pproc->sv_stderr[0] = (int) stderr_pipes[0];
- pproc->sv_stderr[1] = (int) stderr_pipes[1];
-
- pproc->using_pipes = 1;
-
- pproc->lerrno = 0;
-
- return((HANDLE)pproc);
-}
-
-
- HANDLE
-process_init_fd(HANDLE stdinh, HANDLE stdouth, HANDLE stderrh)
-{
- sub_process *pproc;
-
- pproc = malloc(sizeof(*pproc));
- memset(pproc, 0, sizeof(*pproc));
-
- /*
- * Just pass the provided file handles to the 'child side' of the
- * pipe, bypassing pipes altogether.
- */
- pproc->sv_stdin[1] = (int) stdinh;
- pproc->sv_stdout[1] = (int) stdouth;
- pproc->sv_stderr[1] = (int) stderrh;
-
- pproc->last_err = pproc->lerrno = 0;
-
- return((HANDLE)pproc);
-}
-
-
-static HANDLE
-find_file(char *exec_path, LPOFSTRUCT file_info)
-{
- HANDLE exec_handle;
- char *fname;
- char *ext;
-
- fname = malloc(strlen(exec_path) + 5);
- strcpy(fname, exec_path);
- ext = fname + strlen(fname);
-
- strcpy(ext, ".exe");
- if ((exec_handle = (HANDLE)OpenFile(fname, file_info,
- OF_READ | OF_SHARE_COMPAT)) != (HANDLE)HFILE_ERROR) {
- free(fname);
- return(exec_handle);
- }
-
- strcpy(ext, ".cmd");
- if ((exec_handle = (HANDLE)OpenFile(fname, file_info,
- OF_READ | OF_SHARE_COMPAT)) != (HANDLE)HFILE_ERROR) {
- free(fname);
- return(exec_handle);
- }
-
- strcpy(ext, ".bat");
- if ((exec_handle = (HANDLE)OpenFile(fname, file_info,
- OF_READ | OF_SHARE_COMPAT)) != (HANDLE)HFILE_ERROR) {
- free(fname);
- return(exec_handle);
- }
-
- /* should .com come before this case? */
- if ((exec_handle = (HANDLE)OpenFile(exec_path, file_info,
- OF_READ | OF_SHARE_COMPAT)) != (HANDLE)HFILE_ERROR) {
- free(fname);
- return(exec_handle);
- }
-
- strcpy(ext, ".com");
- if ((exec_handle = (HANDLE)OpenFile(fname, file_info,
- OF_READ | OF_SHARE_COMPAT)) != (HANDLE)HFILE_ERROR) {
- free(fname);
- return(exec_handle);
- }
-
- free(fname);
- return(exec_handle);
-}
-
-
-/*
- * Description: Create the child process to be helped
- *
- * Returns:
- *
- * Notes/Dependencies:
- */
-long
-process_begin(
- HANDLE proc,
- char **argv,
- char **envp,
- char *exec_path,
- char *as_user)
-{
- sub_process *pproc = (sub_process *)proc;
- char *shell_name = 0;
- int file_not_found=0;
- HANDLE exec_handle;
- char buf[256];
- DWORD bytes_returned;
- DWORD flags;
- char *command_line;
- STARTUPINFO startInfo;
- PROCESS_INFORMATION procInfo;
- char *envblk=NULL;
- OFSTRUCT file_info;
-
-
- /*
- * Shell script detection... if the exec_path starts with #! then
- * we want to exec shell-script-name exec-path, not just exec-path
- * NT doesn't recognize #!/bin/sh or #!/etc/Tivoli/bin/perl. We do not
- * hard-code the path to the shell or perl or whatever: Instead, we
- * assume it's in the path somewhere (generally, the NT tools
- * bin directory)
- * We use OpenFile here because it is capable of searching the Path.
- */
-
- exec_handle = find_file(exec_path, &file_info);
-
- /*
- * If we couldn't open the file, just assume that Windows32 will be able
- * to find and execute it.
- */
- if (exec_handle == (HANDLE)HFILE_ERROR) {
- file_not_found++;
- }
- else {
- /* Attempt to read the first line of the file */
- if (ReadFile( exec_handle,
- buf, sizeof(buf) - 1, /* leave room for trailing NULL */
- &bytes_returned, 0) == FALSE || bytes_returned < 2) {
-
- pproc->last_err = GetLastError();
- pproc->lerrno = E_IO;
- CloseHandle(exec_handle);
- return(-1);
- }
- if (buf[0] == '#' && buf[1] == '!') {
- /*
- * This is a shell script... Change the command line from
- * exec_path args to shell_name exec_path args
- */
- char *p;
-
- /* Make sure buf is NULL terminated */
- buf[bytes_returned] = 0;
- /*
- * Depending on the file system type, etc. the first line
- * of the shell script may end with newline or newline-carriage-return
- * Whatever it ends with, cut it off.
- */
- p= strchr(buf, '\n');
- if (p)
- *p = 0;
- p = strchr(buf, '\r');
- if (p)
- *p = 0;
-
- /*
- * Find base name of shell
- */
- shell_name = strrchr( buf, '/');
- if (shell_name) {
- shell_name++;
- } else {
- shell_name = &buf[2];/* skipping "#!" */
- }
-
- }
- CloseHandle(exec_handle);
- }
-
- flags = 0;
-
- if (file_not_found)
- command_line = make_command_line( shell_name, exec_path, argv);
- else
- command_line = make_command_line( shell_name, file_info.szPathName,
- argv);
-
- if ( command_line == NULL ) {
- pproc->last_err = 0;
- pproc->lerrno = E_NO_MEM;
- return(-1);
- }
-
- if (envp) {
- if (arr2envblk(envp, &envblk) ==FALSE) {
- pproc->last_err = 0;
- pproc->lerrno = E_NO_MEM;
- free( command_line );
- return(-1);
- }
- }
-
- if ((shell_name) || (file_not_found)) {
- exec_path = 0; /* Search for the program in %Path% */
- } else {
- exec_path = file_info.szPathName;
- }
-
- /*
- * Set up inherited stdin, stdout, stderr for child
- */
- GetStartupInfo(&startInfo);
- startInfo.dwFlags = STARTF_USESTDHANDLES;
- startInfo.lpReserved = 0;
- startInfo.cbReserved2 = 0;
- startInfo.lpReserved2 = 0;
- startInfo.lpTitle = shell_name ? shell_name : exec_path;
- startInfo.hStdInput = (HANDLE)pproc->sv_stdin[1];
- startInfo.hStdOutput = (HANDLE)pproc->sv_stdout[1];
- startInfo.hStdError = (HANDLE)pproc->sv_stderr[1];
-
- if (as_user) {
- if (envblk) free(envblk);
- return -1;
- } else {
- if (CreateProcess(
- exec_path,
- command_line,
- NULL,
- 0, /* default security attributes for thread */
- TRUE, /* inherit handles (e.g. helper pipes, oserv socket) */
- flags,
- envblk,
- 0, /* default starting directory */
- &startInfo,
- &procInfo) == FALSE) {
-
- pproc->last_err = GetLastError();
- pproc->lerrno = E_FORK;
- fprintf(stderr, "process_begin: CreateProcess(%s, %s, ...) failed.\n", exec_path, command_line);
- if (envblk) free(envblk);
- free( command_line );
- return(-1);
- }
- }
-
- pproc->pid = (int)procInfo.hProcess;
- /* Close the thread handle -- we'll just watch the process */
- CloseHandle(procInfo.hThread);
-
- /* Close the halves of the pipes we don't need */
- if (pproc->sv_stdin) {
- CloseHandle((HANDLE)pproc->sv_stdin[1]);
- (HANDLE)pproc->sv_stdin[1] = 0;
- }
- if (pproc->sv_stdout) {
- CloseHandle((HANDLE)pproc->sv_stdout[1]);
- (HANDLE)pproc->sv_stdout[1] = 0;
- }
- if (pproc->sv_stderr) {
- CloseHandle((HANDLE)pproc->sv_stderr[1]);
- (HANDLE)pproc->sv_stderr[1] = 0;
- }
-
- free( command_line );
- if (envblk) free(envblk);
- pproc->lerrno=0;
- return 0;
-}
-
-
-
-static DWORD
-proc_stdin_thread(sub_process *pproc)
-{
- DWORD in_done;
- for (;;) {
- if (WriteFile( (HANDLE) pproc->sv_stdin[0], pproc->inp, pproc->incnt,
- &in_done, NULL) == FALSE)
- _endthreadex(0);
- // This if should never be true for anonymous pipes, but gives
- // us a chance to change I/O mechanisms later
- if (in_done < pproc->incnt) {
- pproc->incnt -= in_done;
- pproc->inp += in_done;
- } else {
- _endthreadex(0);
- }
- }
- return 0; // for compiler warnings only.. not reached
-}
-
-static DWORD
-proc_stdout_thread(sub_process *pproc)
-{
- DWORD bufsize = 1024;
- char c;
- DWORD nread;
- pproc->outp = malloc(bufsize);
- if (pproc->outp == NULL)
- _endthreadex(0);
- pproc->outcnt = 0;
-
- for (;;) {
- if (ReadFile( (HANDLE)pproc->sv_stdout[0], &c, 1, &nread, NULL)
- == FALSE) {
-/* map_windows32_error_to_string(GetLastError());*/
- _endthreadex(0);
- }
- if (nread == 0)
- _endthreadex(0);
- if (pproc->outcnt + nread > bufsize) {
- bufsize += nread + 512;
- pproc->outp = realloc(pproc->outp, bufsize);
- if (pproc->outp == NULL) {
- pproc->outcnt = 0;
- _endthreadex(0);
- }
- }
- pproc->outp[pproc->outcnt++] = c;
- }
- return 0;
-}
-
-static DWORD
-proc_stderr_thread(sub_process *pproc)
-{
- DWORD bufsize = 1024;
- char c;
- DWORD nread;
- pproc->errp = malloc(bufsize);
- if (pproc->errp == NULL)
- _endthreadex(0);
- pproc->errcnt = 0;
-
- for (;;) {
- if (ReadFile( (HANDLE)pproc->sv_stderr[0], &c, 1, &nread, NULL) == FALSE) {
- map_windows32_error_to_string(GetLastError());
- _endthreadex(0);
- }
- if (nread == 0)
- _endthreadex(0);
- if (pproc->errcnt + nread > bufsize) {
- bufsize += nread + 512;
- pproc->errp = realloc(pproc->errp, bufsize);
- if (pproc->errp == NULL) {
- pproc->errcnt = 0;
- _endthreadex(0);
- }
- }
- pproc->errp[pproc->errcnt++] = c;
- }
- return 0;
-}
-
-
-/*
- * Purpose: collects output from child process and returns results
- *
- * Description:
- *
- * Returns:
- *
- * Notes/Dependencies:
- */
- long
-process_pipe_io(
- HANDLE proc,
- char *stdin_data,
- int stdin_data_len)
-{
- sub_process *pproc = (sub_process *)proc;
- bool_t stdin_eof = FALSE, stdout_eof = FALSE, stderr_eof = FALSE;
- HANDLE childhand = (HANDLE) pproc->pid;
- HANDLE tStdin, tStdout, tStderr;
- DWORD dwStdin, dwStdout, dwStderr;
- HANDLE wait_list[4];
- DWORD wait_count;
- DWORD wait_return;
- HANDLE ready_hand;
- bool_t child_dead = FALSE;
-
-
- /*
- * Create stdin thread, if needed
- */
- pproc->inp = stdin_data;
- pproc->incnt = stdin_data_len;
- if (!pproc->inp) {
- stdin_eof = TRUE;
- CloseHandle((HANDLE)pproc->sv_stdin[0]);
- (HANDLE)pproc->sv_stdin[0] = 0;
- } else {
- tStdin = (HANDLE) _beginthreadex( 0, 1024,
- (unsigned (__stdcall *) (void *))proc_stdin_thread, pproc, 0,
- (unsigned int *) &dwStdin);
- if (tStdin == 0) {
- pproc->last_err = GetLastError();
- pproc->lerrno = E_SCALL;
- goto done;
- }
- }
-
- /*
- * Assume child will produce stdout and stderr
- */
- tStdout = (HANDLE) _beginthreadex( 0, 1024,
- (unsigned (__stdcall *) (void *))proc_stdout_thread, pproc, 0,
- (unsigned int *) &dwStdout);
- tStderr = (HANDLE) _beginthreadex( 0, 1024,
- (unsigned (__stdcall *) (void *))proc_stderr_thread, pproc, 0,
- (unsigned int *) &dwStderr);
-
- if (tStdout == 0 || tStderr == 0) {
-
- pproc->last_err = GetLastError();
- pproc->lerrno = E_SCALL;
- goto done;
- }
-
-
- /*
- * Wait for all I/O to finish and for the child process to exit
- */
-
- while (!stdin_eof || !stdout_eof || !stderr_eof || !child_dead) {
- wait_count = 0;
- if (!stdin_eof) {
- wait_list[wait_count++] = tStdin;
- }
- if (!stdout_eof) {
- wait_list[wait_count++] = tStdout;
- }
- if (!stderr_eof) {
- wait_list[wait_count++] = tStderr;
- }
- if (!child_dead) {
- wait_list[wait_count++] = childhand;
- }
-
- wait_return = WaitForMultipleObjects(wait_count, wait_list,
- FALSE, /* don't wait for all: one ready will do */
- child_dead? 1000 :INFINITE); /* after the child dies, subthreads have
- one second to collect all remaining output */
-
- if (wait_return == WAIT_FAILED) {
-/* map_windows32_error_to_string(GetLastError());*/
- pproc->last_err = GetLastError();
- pproc->lerrno = E_SCALL;
- goto done;
- }
-
- ready_hand = wait_list[wait_return - WAIT_OBJECT_0];
-
- if (ready_hand == tStdin) {
- CloseHandle((HANDLE)pproc->sv_stdin[0]);
- (HANDLE)pproc->sv_stdin[0] = 0;
- CloseHandle(tStdin);
- tStdin = 0;
- stdin_eof = TRUE;
-
- } else if (ready_hand == tStdout) {
-
- CloseHandle((HANDLE)pproc->sv_stdout[0]);
- (HANDLE)pproc->sv_stdout[0] = 0;
- CloseHandle(tStdout);
- tStdout = 0;
- stdout_eof = TRUE;
-
- } else if (ready_hand == tStderr) {
-
- CloseHandle((HANDLE)pproc->sv_stderr[0]);
- (HANDLE)pproc->sv_stderr[0] = 0;
- CloseHandle(tStderr);
- tStderr = 0;
- stderr_eof = TRUE;
-
- } else if (ready_hand == childhand) {
-
- if (GetExitCodeProcess(childhand, &pproc->exit_code) == FALSE) {
- pproc->last_err = GetLastError();
- pproc->lerrno = E_SCALL;
- goto done;
- }
- child_dead = TRUE;
-
- } else {
-
- /* ?? Got back a handle we didn't query ?? */
- pproc->last_err = 0;
- pproc->lerrno = E_FAIL;
- goto done;
- }
- }
-
- done:
- if (tStdin != 0)
- CloseHandle(tStdin);
- if (tStdout != 0)
- CloseHandle(tStdout);
- if (tStderr != 0)
- CloseHandle(tStderr);
-
- if (pproc->lerrno)
- return(-1);
- else
- return(0);
-
-}
-
-/*
- * Purpose: collects output from child process and returns results
- *
- * Description:
- *
- * Returns:
- *
- * Notes/Dependencies:
- */
- long
-process_file_io(
- HANDLE proc)
-{
- sub_process *pproc;
- HANDLE childhand;
- DWORD wait_return;
-
- if (proc == NULL)
- pproc = process_wait_for_any_private();
- else
- pproc = (sub_process *)proc;
-
- /* some sort of internal error */
- if (!pproc)
- return -1;
-
- childhand = (HANDLE) pproc->pid;
-
- /*
- * This function is poorly named, and could also be used just to wait
- * for child death if you're doing your own pipe I/O. If that is
- * the case, close the pipe handles here.
- */
- if (pproc->sv_stdin[0]) {
- CloseHandle((HANDLE)pproc->sv_stdin[0]);
- pproc->sv_stdin[0] = 0;
- }
- if (pproc->sv_stdout[0]) {
- CloseHandle((HANDLE)pproc->sv_stdout[0]);
- pproc->sv_stdout[0] = 0;
- }
- if (pproc->sv_stderr[0]) {
- CloseHandle((HANDLE)pproc->sv_stderr[0]);
- pproc->sv_stderr[0] = 0;
- }
-
- /*
- * Wait for the child process to exit
- */
-
- wait_return = WaitForSingleObject(childhand, INFINITE);
-
- if (wait_return != WAIT_OBJECT_0) {
-/* map_windows32_error_to_string(GetLastError());*/
- pproc->last_err = GetLastError();
- pproc->lerrno = E_SCALL;
- goto done2;
- }
-
- if (GetExitCodeProcess(childhand, &pproc->exit_code) == FALSE) {
- pproc->last_err = GetLastError();
- pproc->lerrno = E_SCALL;
- }
-
-done2:
- if (pproc->lerrno)
- return(-1);
- else
- return(0);
-
-}
-
-/*
- * Description: Clean up any leftover handles, etc. It is up to the
- * caller to manage and free the input, ouput, and stderr buffers.
- */
- void
-process_cleanup(
- HANDLE proc)
-{
- sub_process *pproc = (sub_process *)proc;
- int i;
-
- if (pproc->using_pipes) {
- for (i= 0; i <= 1; i++) {
- if ((HANDLE)pproc->sv_stdin[i])
- CloseHandle((HANDLE)pproc->sv_stdin[i]);
- if ((HANDLE)pproc->sv_stdout[i])
- CloseHandle((HANDLE)pproc->sv_stdout[i]);
- if ((HANDLE)pproc->sv_stderr[i])
- CloseHandle((HANDLE)pproc->sv_stderr[i]);
- }
- }
- if ((HANDLE)pproc->pid)
- CloseHandle((HANDLE)pproc->pid);
-
- free(pproc);
-}
-
-
-/*
- * Description:
- * Create a command line buffer to pass to CreateProcess
- *
- * Returns: the buffer or NULL for failure
- * Shell case: sh_name a:/full/path/to/script argv[1] argv[2] ...
- * Otherwise: argv[0] argv[1] argv[2] ...
- *
- * Notes/Dependencies:
- * CreateProcess does not take an argv, so this command creates a
- * command line for the executable.
- */
-
-static char *
-make_command_line( char *shell_name, char *full_exec_path, char **argv)
-{
- int argc = 0;
- char** argvi;
- int* enclose_in_quotes = NULL;
- int* enclose_in_quotes_i;
- unsigned int bytes_required = 0;
- char* command_line;
- char* command_line_i;
-
- if (shell_name && full_exec_path) {
- bytes_required
- = strlen(shell_name) + 1 + strlen(full_exec_path);
- /*
- * Skip argv[0] if any, when shell_name is given.
- */
- if (*argv) argv++;
- /*
- * Add one for the intervening space.
- */
- if (*argv) bytes_required++;
- }
-
- argvi = argv;
- while (*(argvi++)) argc++;
-
- if (argc) {
- enclose_in_quotes = (int*) calloc(1, argc * sizeof(int));
-
- if (!enclose_in_quotes) {
- return NULL;
- }
- }
-
- /* We have to make one pass through each argv[i] to see if we need
- * to enclose it in ", so we might as well figure out how much
- * memory we'll need on the same pass.
- */
-
- argvi = argv;
- enclose_in_quotes_i = enclose_in_quotes;
- while(*argvi) {
- char* p = *argvi;
- unsigned int backslash_count = 0;
-
- /*
- * We have to enclose empty arguments in ".
- */
- if (!(*p)) *enclose_in_quotes_i = 1;
-
- while(*p) {
- switch (*p) {
- case '\"':
- /*
- * We have to insert a backslash for each "
- * and each \ that precedes the ".
- */
- bytes_required += (backslash_count + 1);
- backslash_count = 0;
- break;
-
- case '\\':
- backslash_count++;
- break;
- /*
- * At one time we set *enclose_in_quotes_i for '*' or '?' to suppress
- * wildcard expansion in programs linked with MSVC's SETARGV.OBJ so
- * that argv in always equals argv out. This was removed. Say you have
- * such a program named glob.exe. You enter
- * glob '*'
- * at the sh command prompt. Obviously the intent is to make glob do the
- * wildcarding instead of sh. If we set *enclose_in_quotes_i for '*' or '?',
- * then the command line that glob would see would be
- * glob "*"
- * and the _setargv in SETARGV.OBJ would _not_ expand the *.
- */
- case ' ':
- case '\t':
- *enclose_in_quotes_i = 1;
- /* fall through */
-
- default:
- backslash_count = 0;
- break;
- }
-
- /*
- * Add one for each character in argv[i].
- */
- bytes_required++;
-
- p++;
- }
-
- if (*enclose_in_quotes_i) {
- /*
- * Add one for each enclosing ",
- * and one for each \ that precedes the
- * closing ".
- */
- bytes_required += (backslash_count + 2);
- }
-
- /*
- * Add one for the intervening space.
- */
- if (*(++argvi)) bytes_required++;
- enclose_in_quotes_i++;
- }
-
- /*
- * Add one for the terminating NULL.
- */
- bytes_required++;
-
- command_line = (char*) malloc(bytes_required);
-
- if (!command_line) {
- if (enclose_in_quotes) free(enclose_in_quotes);
- return NULL;
- }
-
- command_line_i = command_line;
-
- if (shell_name && full_exec_path) {
- while(*shell_name) {
- *(command_line_i++) = *(shell_name++);
- }
-
- *(command_line_i++) = ' ';
-
- while(*full_exec_path) {
- *(command_line_i++) = *(full_exec_path++);
- }
-
- if (*argv) {
- *(command_line_i++) = ' ';
- }
- }
-
- argvi = argv;
- enclose_in_quotes_i = enclose_in_quotes;
-
- while(*argvi) {
- char* p = *argvi;
- unsigned int backslash_count = 0;
-
- if (*enclose_in_quotes_i) {
- *(command_line_i++) = '\"';
- }
-
- while(*p) {
- if (*p == '\"') {
- /*
- * We have to insert a backslash for the "
- * and each \ that precedes the ".
- */
- backslash_count++;
-
- while(backslash_count) {
- *(command_line_i++) = '\\';
- backslash_count--;
- };
-
- } else if (*p == '\\') {
- backslash_count++;
- } else {
- backslash_count = 0;
- }
-
- /*
- * Copy the character.
- */
- *(command_line_i++) = *(p++);
- }
-
- if (*enclose_in_quotes_i) {
- /*
- * Add one \ for each \ that precedes the
- * closing ".
- */
- while(backslash_count--) {
- *(command_line_i++) = '\\';
- };
-
- *(command_line_i++) = '\"';
- }
-
- /*
- * Append an intervening space.
- */
- if (*(++argvi)) {
- *(command_line_i++) = ' ';
- }
-
- enclose_in_quotes_i++;
- }
-
- /*
- * Append the terminating NULL.
- */
- *command_line_i = '\0';
-
- if (enclose_in_quotes) free(enclose_in_quotes);
- return command_line;
-}
-
-/*
- * Description: Given an argv and optional envp, launch the process
- * using the default stdin, stdout, and stderr handles.
- * Also, register process so that process_wait_for_any_private()
- * can be used via process_file_io(NULL) or
- * process_wait_for_any().
- *
- * Returns:
- *
- * Notes/Dependencies:
- */
-HANDLE
-process_easy(
- char **argv,
- char **envp)
-{
- HANDLE hIn;
- HANDLE hOut;
- HANDLE hErr;
- HANDLE hProcess;
-
- if (DuplicateHandle(GetCurrentProcess(),
- GetStdHandle(STD_INPUT_HANDLE),
- GetCurrentProcess(),
- &hIn,
- 0,
- TRUE,
- DUPLICATE_SAME_ACCESS) == FALSE) {
- fprintf(stderr,
- "process_easy: DuplicateHandle(In) failed (e=%d)\n",
- GetLastError());
- return INVALID_HANDLE_VALUE;
- }
- if (DuplicateHandle(GetCurrentProcess(),
- GetStdHandle(STD_OUTPUT_HANDLE),
- GetCurrentProcess(),
- &hOut,
- 0,
- TRUE,
- DUPLICATE_SAME_ACCESS) == FALSE) {
- fprintf(stderr,
- "process_easy: DuplicateHandle(Out) failed (e=%d)\n",
- GetLastError());
- return INVALID_HANDLE_VALUE;
- }
- if (DuplicateHandle(GetCurrentProcess(),
- GetStdHandle(STD_ERROR_HANDLE),
- GetCurrentProcess(),
- &hErr,
- 0,
- TRUE,
- DUPLICATE_SAME_ACCESS) == FALSE) {
- fprintf(stderr,
- "process_easy: DuplicateHandle(Err) failed (e=%d)\n",
- GetLastError());
- return INVALID_HANDLE_VALUE;
- }
-
- hProcess = process_init_fd(hIn, hOut, hErr);
-
- if (process_begin(hProcess, argv, envp, argv[0], NULL)) {
- fake_exits_pending++;
- ((sub_process*) hProcess)->exit_code = process_last_err(hProcess);
-
- /* close up unused handles */
- CloseHandle(hIn);
- CloseHandle(hOut);
- CloseHandle(hErr);
- }
-
- process_register(hProcess);
-
- return hProcess;
-}
+#include <stdlib.h>
+#include <stdio.h>
+#include <process.h> /* for msvc _beginthreadex, _endthreadex */
+#include <windows.h>
+
+#include "sub_proc.h"
+#include "proc.h"
+#include "w32err.h"
+#include "config.h"
+
+static char *make_command_line( char *shell_name, char *exec_path, char **argv);
+
+typedef struct sub_process_t {
+ int sv_stdin[2];
+ int sv_stdout[2];
+ int sv_stderr[2];
+ int using_pipes;
+ char *inp;
+ DWORD incnt;
+ char * volatile outp;
+ volatile DWORD outcnt;
+ char * volatile errp;
+ volatile DWORD errcnt;
+ int pid;
+ int exit_code;
+ int signal;
+ long last_err;
+ long lerrno;
+} sub_process;
+
+/* keep track of children so we can implement a waitpid-like routine */
+static sub_process *proc_array[256];
+static int proc_index = 0;
+static int fake_exits_pending = 0;
+
+/*
+ * When a process has been waited for, adjust the wait state
+ * array so that we don't wait for it again
+ */
+static void
+process_adjust_wait_state(sub_process* pproc)
+{
+ int i;
+
+ if (!proc_index)
+ return;
+
+ for (i = 0; i < proc_index; i++)
+ if (proc_array[i]->pid == pproc->pid)
+ break;
+
+ if (i < proc_index) {
+ proc_index--;
+ if (i != proc_index)
+ memmove(&proc_array[i], &proc_array[i+1],
+ (proc_index-i) * sizeof(sub_process*));
+ proc_array[proc_index] = NULL;
+ }
+}
+
+/*
+ * Waits for any of the registered child processes to finish.
+ */
+static sub_process *
+process_wait_for_any_private(void)
+{
+ HANDLE handles[256];
+ DWORD retval, which;
+ int i;
+
+ if (!proc_index)
+ return NULL;
+
+ /* build array of handles to wait for */
+ for (i = 0; i < proc_index; i++) {
+ handles[i] = (HANDLE) proc_array[i]->pid;
+
+ if (fake_exits_pending && proc_array[i]->exit_code)
+ break;
+ }
+
+ /* wait for someone to exit */
+ if (!fake_exits_pending) {
+ retval = WaitForMultipleObjects(proc_index, handles, FALSE, INFINITE);
+ which = retval - WAIT_OBJECT_0;
+ } else {
+ fake_exits_pending--;
+ retval = !WAIT_FAILED;
+ which = i;
+ }
+
+ /* return pointer to process */
+ if (retval != WAIT_FAILED) {
+ sub_process* pproc = proc_array[which];
+ process_adjust_wait_state(pproc);
+ return pproc;
+ } else
+ return NULL;
+}
+
+/*
+ * Terminate a process.
+ */
+BOOL
+process_kill(HANDLE proc, int signal)
+{
+ sub_process* pproc = (sub_process*) proc;
+ pproc->signal = signal;
+ return (TerminateProcess((HANDLE) pproc->pid, signal));
+}
+
+/*
+ * Use this function to register processes you wish to wait for by
+ * calling process_file_io(NULL) or process_wait_any(). This must be done
+ * because it is possible for callers of this library to reuse the same
+ * handle for multiple processes launches :-(
+ */
+void
+process_register(HANDLE proc)
+{
+ proc_array[proc_index++] = (sub_process *) proc;
+}
+
+/*
+ * Public function which works kind of like waitpid(). Wait for any
+ * of the children to die and return results. To call this function,
+ * you must do 1 of things:
+ *
+ * x = process_easy(...);
+ *
+ * or
+ *
+ * x = process_init_fd();
+ * process_register(x);
+ *
+ * or
+ *
+ * x = process_init();
+ * process_register(x);
+ *
+ * You must NOT then call process_pipe_io() because this function is
+ * not capable of handling automatic notification of any child
+ * death.
+ */
+
+HANDLE
+process_wait_for_any(void)
+{
+ sub_process* pproc = process_wait_for_any_private();
+
+ if (!pproc)
+ return NULL;
+ else {
+ /*
+ * Ouch! can't tell caller if this fails directly. Caller
+ * will have to use process_last_err()
+ */
+ (void) process_file_io(pproc);
+ return ((HANDLE) pproc);
+ }
+}
+
+long
+process_errno(HANDLE proc)
+{
+ return (((sub_process *)proc)->lerrno);
+}
+
+long
+process_signal(HANDLE proc)
+{
+ return (((sub_process *)proc)->signal);
+}
+
+ long
+process_last_err(HANDLE proc)
+{
+ return (((sub_process *)proc)->last_err);
+}
+
+ long
+process_exit_code(HANDLE proc)
+{
+ return (((sub_process *)proc)->exit_code);
+}
+
+ char *
+process_outbuf(HANDLE proc)
+{
+ return (((sub_process *)proc)->outp);
+}
+
+ char *
+process_errbuf(HANDLE proc)
+{
+ return (((sub_process *)proc)->errp);
+}
+
+ int
+process_outcnt(HANDLE proc)
+{
+ return (((sub_process *)proc)->outcnt);
+}
+
+ int
+process_errcnt(HANDLE proc)
+{
+ return (((sub_process *)proc)->errcnt);
+}
+
+ void
+process_pipes(HANDLE proc, int pipes[3])
+{
+ pipes[0] = ((sub_process *)proc)->sv_stdin[0];
+ pipes[1] = ((sub_process *)proc)->sv_stdout[0];
+ pipes[2] = ((sub_process *)proc)->sv_stderr[0];
+ return;
+}
+
+
+ HANDLE
+process_init()
+{
+ sub_process *pproc;
+ /*
+ * open file descriptors for attaching stdin/stdout/sterr
+ */
+ HANDLE stdin_pipes[2];
+ HANDLE stdout_pipes[2];
+ HANDLE stderr_pipes[2];
+ SECURITY_ATTRIBUTES inherit;
+ BYTE sd[SECURITY_DESCRIPTOR_MIN_LENGTH];
+
+ pproc = malloc(sizeof(*pproc));
+ memset(pproc, 0, sizeof(*pproc));
+
+ /* We can't use NULL for lpSecurityDescriptor because that
+ uses the default security descriptor of the calling process.
+ Instead we use a security descriptor with no DACL. This
+ allows nonrestricted access to the associated objects. */
+
+ if (!InitializeSecurityDescriptor((PSECURITY_DESCRIPTOR)(&sd),
+ SECURITY_DESCRIPTOR_REVISION)) {
+ pproc->last_err = GetLastError();
+ pproc->lerrno = E_SCALL;
+ return((HANDLE)pproc);
+ }
+
+ inherit.nLength = sizeof(inherit);
+ inherit.lpSecurityDescriptor = (PSECURITY_DESCRIPTOR)(&sd);
+ inherit.bInheritHandle = TRUE;
+
+ // By convention, parent gets pipe[0], and child gets pipe[1]
+ // This means the READ side of stdin pipe goes into pipe[1]
+ // and the WRITE side of the stdout and stderr pipes go into pipe[1]
+ if (CreatePipe( &stdin_pipes[1], &stdin_pipes[0], &inherit, 0) == FALSE ||
+ CreatePipe( &stdout_pipes[0], &stdout_pipes[1], &inherit, 0) == FALSE ||
+ CreatePipe( &stderr_pipes[0], &stderr_pipes[1], &inherit, 0) == FALSE) {
+
+ pproc->last_err = GetLastError();
+ pproc->lerrno = E_SCALL;
+ return((HANDLE)pproc);
+ }
+
+ //
+ // Mark the parent sides of the pipes as non-inheritable
+ //
+ if (SetHandleInformation(stdin_pipes[0],
+ HANDLE_FLAG_INHERIT, 0) == FALSE ||
+ SetHandleInformation(stdout_pipes[0],
+ HANDLE_FLAG_INHERIT, 0) == FALSE ||
+ SetHandleInformation(stderr_pipes[0],
+ HANDLE_FLAG_INHERIT, 0) == FALSE) {
+
+ pproc->last_err = GetLastError();
+ pproc->lerrno = E_SCALL;
+ return((HANDLE)pproc);
+ }
+ pproc->sv_stdin[0] = (int) stdin_pipes[0];
+ pproc->sv_stdin[1] = (int) stdin_pipes[1];
+ pproc->sv_stdout[0] = (int) stdout_pipes[0];
+ pproc->sv_stdout[1] = (int) stdout_pipes[1];
+ pproc->sv_stderr[0] = (int) stderr_pipes[0];
+ pproc->sv_stderr[1] = (int) stderr_pipes[1];
+
+ pproc->using_pipes = 1;
+
+ pproc->lerrno = 0;
+
+ return((HANDLE)pproc);
+}
+
+
+ HANDLE
+process_init_fd(HANDLE stdinh, HANDLE stdouth, HANDLE stderrh)
+{
+ sub_process *pproc;
+
+ pproc = malloc(sizeof(*pproc));
+ memset(pproc, 0, sizeof(*pproc));
+
+ /*
+ * Just pass the provided file handles to the 'child side' of the
+ * pipe, bypassing pipes altogether.
+ */
+ pproc->sv_stdin[1] = (int) stdinh;
+ pproc->sv_stdout[1] = (int) stdouth;
+ pproc->sv_stderr[1] = (int) stderrh;
+
+ pproc->last_err = pproc->lerrno = 0;
+
+ return((HANDLE)pproc);
+}
+
+
+static HANDLE
+find_file(char *exec_path, LPOFSTRUCT file_info)
+{
+ HANDLE exec_handle;
+ char *fname;
+ char *ext;
+
+ fname = malloc(strlen(exec_path) + 5);
+ strcpy(fname, exec_path);
+ ext = fname + strlen(fname);
+
+ strcpy(ext, ".exe");
+ if ((exec_handle = (HANDLE)OpenFile(fname, file_info,
+ OF_READ | OF_SHARE_COMPAT)) != (HANDLE)HFILE_ERROR) {
+ free(fname);
+ return(exec_handle);
+ }
+
+ strcpy(ext, ".cmd");
+ if ((exec_handle = (HANDLE)OpenFile(fname, file_info,
+ OF_READ | OF_SHARE_COMPAT)) != (HANDLE)HFILE_ERROR) {
+ free(fname);
+ return(exec_handle);
+ }
+
+ strcpy(ext, ".bat");
+ if ((exec_handle = (HANDLE)OpenFile(fname, file_info,
+ OF_READ | OF_SHARE_COMPAT)) != (HANDLE)HFILE_ERROR) {
+ free(fname);
+ return(exec_handle);
+ }
+
+ /* should .com come before this case? */
+ if ((exec_handle = (HANDLE)OpenFile(exec_path, file_info,
+ OF_READ | OF_SHARE_COMPAT)) != (HANDLE)HFILE_ERROR) {
+ free(fname);
+ return(exec_handle);
+ }
+
+ strcpy(ext, ".com");
+ if ((exec_handle = (HANDLE)OpenFile(fname, file_info,
+ OF_READ | OF_SHARE_COMPAT)) != (HANDLE)HFILE_ERROR) {
+ free(fname);
+ return(exec_handle);
+ }
+
+ free(fname);
+ return(exec_handle);
+}
+
+
+/*
+ * Description: Create the child process to be helped
+ *
+ * Returns:
+ *
+ * Notes/Dependencies:
+ */
+long
+process_begin(
+ HANDLE proc,
+ char **argv,
+ char **envp,
+ char *exec_path,
+ char *as_user)
+{
+ sub_process *pproc = (sub_process *)proc;
+ char *shell_name = 0;
+ int file_not_found=0;
+ HANDLE exec_handle;
+ char buf[256];
+ DWORD bytes_returned;
+ DWORD flags;
+ char *command_line;
+ STARTUPINFO startInfo;
+ PROCESS_INFORMATION procInfo;
+ char *envblk=NULL;
+ OFSTRUCT file_info;
+
+
+ /*
+ * Shell script detection... if the exec_path starts with #! then
+ * we want to exec shell-script-name exec-path, not just exec-path
+ * NT doesn't recognize #!/bin/sh or #!/etc/Tivoli/bin/perl. We do not
+ * hard-code the path to the shell or perl or whatever: Instead, we
+ * assume it's in the path somewhere (generally, the NT tools
+ * bin directory)
+ * We use OpenFile here because it is capable of searching the Path.
+ */
+
+ exec_handle = find_file(exec_path, &file_info);
+
+ /*
+ * If we couldn't open the file, just assume that Windows32 will be able
+ * to find and execute it.
+ */
+ if (exec_handle == (HANDLE)HFILE_ERROR) {
+ file_not_found++;
+ }
+ else {
+ /* Attempt to read the first line of the file */
+ if (ReadFile( exec_handle,
+ buf, sizeof(buf) - 1, /* leave room for trailing NULL */
+ &bytes_returned, 0) == FALSE || bytes_returned < 2) {
+
+ pproc->last_err = GetLastError();
+ pproc->lerrno = E_IO;
+ CloseHandle(exec_handle);
+ return(-1);
+ }
+ if (buf[0] == '#' && buf[1] == '!') {
+ /*
+ * This is a shell script... Change the command line from
+ * exec_path args to shell_name exec_path args
+ */
+ char *p;
+
+ /* Make sure buf is NULL terminated */
+ buf[bytes_returned] = 0;
+ /*
+ * Depending on the file system type, etc. the first line
+ * of the shell script may end with newline or newline-carriage-return
+ * Whatever it ends with, cut it off.
+ */
+ p= strchr(buf, '\n');
+ if (p)
+ *p = 0;
+ p = strchr(buf, '\r');
+ if (p)
+ *p = 0;
+
+ /*
+ * Find base name of shell
+ */
+ shell_name = strrchr( buf, '/');
+ if (shell_name) {
+ shell_name++;
+ } else {
+ shell_name = &buf[2];/* skipping "#!" */
+ }
+
+ }
+ CloseHandle(exec_handle);
+ }
+
+ flags = 0;
+
+ if (file_not_found)
+ command_line = make_command_line( shell_name, exec_path, argv);
+ else
+ command_line = make_command_line( shell_name, file_info.szPathName,
+ argv);
+
+ if ( command_line == NULL ) {
+ pproc->last_err = 0;
+ pproc->lerrno = E_NO_MEM;
+ return(-1);
+ }
+
+ if (envp) {
+ if (arr2envblk(envp, &envblk) ==FALSE) {
+ pproc->last_err = 0;
+ pproc->lerrno = E_NO_MEM;
+ free( command_line );
+ return(-1);
+ }
+ }
+
+ if ((shell_name) || (file_not_found)) {
+ exec_path = 0; /* Search for the program in %Path% */
+ } else {
+ exec_path = file_info.szPathName;
+ }
+
+ /*
+ * Set up inherited stdin, stdout, stderr for child
+ */
+ GetStartupInfo(&startInfo);
+ startInfo.dwFlags = STARTF_USESTDHANDLES;
+ startInfo.lpReserved = 0;
+ startInfo.cbReserved2 = 0;
+ startInfo.lpReserved2 = 0;
+ startInfo.lpTitle = shell_name ? shell_name : exec_path;
+ startInfo.hStdInput = (HANDLE)pproc->sv_stdin[1];
+ startInfo.hStdOutput = (HANDLE)pproc->sv_stdout[1];
+ startInfo.hStdError = (HANDLE)pproc->sv_stderr[1];
+
+ if (as_user) {
+ if (envblk) free(envblk);
+ return -1;
+ } else {
+ if (CreateProcess(
+ exec_path,
+ command_line,
+ NULL,
+ 0, /* default security attributes for thread */
+ TRUE, /* inherit handles (e.g. helper pipes, oserv socket) */
+ flags,
+ envblk,
+ 0, /* default starting directory */
+ &startInfo,
+ &procInfo) == FALSE) {
+
+ pproc->last_err = GetLastError();
+ pproc->lerrno = E_FORK;
+ fprintf(stderr, "process_begin: CreateProcess(%s, %s, ...) failed.\n", exec_path, command_line);
+ if (envblk) free(envblk);
+ free( command_line );
+ return(-1);
+ }
+ }
+
+ pproc->pid = (int)procInfo.hProcess;
+ /* Close the thread handle -- we'll just watch the process */
+ CloseHandle(procInfo.hThread);
+
+ /* Close the halves of the pipes we don't need */
+ if (pproc->sv_stdin) {
+ CloseHandle((HANDLE)pproc->sv_stdin[1]);
+ (HANDLE)pproc->sv_stdin[1] = 0;
+ }
+ if (pproc->sv_stdout) {
+ CloseHandle((HANDLE)pproc->sv_stdout[1]);
+ (HANDLE)pproc->sv_stdout[1] = 0;
+ }
+ if (pproc->sv_stderr) {
+ CloseHandle((HANDLE)pproc->sv_stderr[1]);
+ (HANDLE)pproc->sv_stderr[1] = 0;
+ }
+
+ free( command_line );
+ if (envblk) free(envblk);
+ pproc->lerrno=0;
+ return 0;
+}
+
+
+
+static DWORD
+proc_stdin_thread(sub_process *pproc)
+{
+ DWORD in_done;
+ for (;;) {
+ if (WriteFile( (HANDLE) pproc->sv_stdin[0], pproc->inp, pproc->incnt,
+ &in_done, NULL) == FALSE)
+ _endthreadex(0);
+ // This if should never be true for anonymous pipes, but gives
+ // us a chance to change I/O mechanisms later
+ if (in_done < pproc->incnt) {
+ pproc->incnt -= in_done;
+ pproc->inp += in_done;
+ } else {
+ _endthreadex(0);
+ }
+ }
+ return 0; // for compiler warnings only.. not reached
+}
+
+static DWORD
+proc_stdout_thread(sub_process *pproc)
+{
+ DWORD bufsize = 1024;
+ char c;
+ DWORD nread;
+ pproc->outp = malloc(bufsize);
+ if (pproc->outp == NULL)
+ _endthreadex(0);
+ pproc->outcnt = 0;
+
+ for (;;) {
+ if (ReadFile( (HANDLE)pproc->sv_stdout[0], &c, 1, &nread, NULL)
+ == FALSE) {
+/* map_windows32_error_to_string(GetLastError());*/
+ _endthreadex(0);
+ }
+ if (nread == 0)
+ _endthreadex(0);
+ if (pproc->outcnt + nread > bufsize) {
+ bufsize += nread + 512;
+ pproc->outp = realloc(pproc->outp, bufsize);
+ if (pproc->outp == NULL) {
+ pproc->outcnt = 0;
+ _endthreadex(0);
+ }
+ }
+ pproc->outp[pproc->outcnt++] = c;
+ }
+ return 0;
+}
+
+static DWORD
+proc_stderr_thread(sub_process *pproc)
+{
+ DWORD bufsize = 1024;
+ char c;
+ DWORD nread;
+ pproc->errp = malloc(bufsize);
+ if (pproc->errp == NULL)
+ _endthreadex(0);
+ pproc->errcnt = 0;
+
+ for (;;) {
+ if (ReadFile( (HANDLE)pproc->sv_stderr[0], &c, 1, &nread, NULL) == FALSE) {
+ map_windows32_error_to_string(GetLastError());
+ _endthreadex(0);
+ }
+ if (nread == 0)
+ _endthreadex(0);
+ if (pproc->errcnt + nread > bufsize) {
+ bufsize += nread + 512;
+ pproc->errp = realloc(pproc->errp, bufsize);
+ if (pproc->errp == NULL) {
+ pproc->errcnt = 0;
+ _endthreadex(0);
+ }
+ }
+ pproc->errp[pproc->errcnt++] = c;
+ }
+ return 0;
+}
+
+
+/*
+ * Purpose: collects output from child process and returns results
+ *
+ * Description:
+ *
+ * Returns:
+ *
+ * Notes/Dependencies:
+ */
+ long
+process_pipe_io(
+ HANDLE proc,
+ char *stdin_data,
+ int stdin_data_len)
+{
+ sub_process *pproc = (sub_process *)proc;
+ bool_t stdin_eof = FALSE, stdout_eof = FALSE, stderr_eof = FALSE;
+ HANDLE childhand = (HANDLE) pproc->pid;
+ HANDLE tStdin, tStdout, tStderr;
+ DWORD dwStdin, dwStdout, dwStderr;
+ HANDLE wait_list[4];
+ DWORD wait_count;
+ DWORD wait_return;
+ HANDLE ready_hand;
+ bool_t child_dead = FALSE;
+
+
+ /*
+ * Create stdin thread, if needed
+ */
+ pproc->inp = stdin_data;
+ pproc->incnt = stdin_data_len;
+ if (!pproc->inp) {
+ stdin_eof = TRUE;
+ CloseHandle((HANDLE)pproc->sv_stdin[0]);
+ (HANDLE)pproc->sv_stdin[0] = 0;
+ } else {
+ tStdin = (HANDLE) _beginthreadex( 0, 1024,
+ (unsigned (__stdcall *) (void *))proc_stdin_thread, pproc, 0,
+ (unsigned int *) &dwStdin);
+ if (tStdin == 0) {
+ pproc->last_err = GetLastError();
+ pproc->lerrno = E_SCALL;
+ goto done;
+ }
+ }
+
+ /*
+ * Assume child will produce stdout and stderr
+ */
+ tStdout = (HANDLE) _beginthreadex( 0, 1024,
+ (unsigned (__stdcall *) (void *))proc_stdout_thread, pproc, 0,
+ (unsigned int *) &dwStdout);
+ tStderr = (HANDLE) _beginthreadex( 0, 1024,
+ (unsigned (__stdcall *) (void *))proc_stderr_thread, pproc, 0,
+ (unsigned int *) &dwStderr);
+
+ if (tStdout == 0 || tStderr == 0) {
+
+ pproc->last_err = GetLastError();
+ pproc->lerrno = E_SCALL;
+ goto done;
+ }
+
+
+ /*
+ * Wait for all I/O to finish and for the child process to exit
+ */
+
+ while (!stdin_eof || !stdout_eof || !stderr_eof || !child_dead) {
+ wait_count = 0;
+ if (!stdin_eof) {
+ wait_list[wait_count++] = tStdin;
+ }
+ if (!stdout_eof) {
+ wait_list[wait_count++] = tStdout;
+ }
+ if (!stderr_eof) {
+ wait_list[wait_count++] = tStderr;
+ }
+ if (!child_dead) {
+ wait_list[wait_count++] = childhand;
+ }
+
+ wait_return = WaitForMultipleObjects(wait_count, wait_list,
+ FALSE, /* don't wait for all: one ready will do */
+ child_dead? 1000 :INFINITE); /* after the child dies, subthreads have
+ one second to collect all remaining output */
+
+ if (wait_return == WAIT_FAILED) {
+/* map_windows32_error_to_string(GetLastError());*/
+ pproc->last_err = GetLastError();
+ pproc->lerrno = E_SCALL;
+ goto done;
+ }
+
+ ready_hand = wait_list[wait_return - WAIT_OBJECT_0];
+
+ if (ready_hand == tStdin) {
+ CloseHandle((HANDLE)pproc->sv_stdin[0]);
+ (HANDLE)pproc->sv_stdin[0] = 0;
+ CloseHandle(tStdin);
+ tStdin = 0;
+ stdin_eof = TRUE;
+
+ } else if (ready_hand == tStdout) {
+
+ CloseHandle((HANDLE)pproc->sv_stdout[0]);
+ (HANDLE)pproc->sv_stdout[0] = 0;
+ CloseHandle(tStdout);
+ tStdout = 0;
+ stdout_eof = TRUE;
+
+ } else if (ready_hand == tStderr) {
+
+ CloseHandle((HANDLE)pproc->sv_stderr[0]);
+ (HANDLE)pproc->sv_stderr[0] = 0;
+ CloseHandle(tStderr);
+ tStderr = 0;
+ stderr_eof = TRUE;
+
+ } else if (ready_hand == childhand) {
+
+ if (GetExitCodeProcess(childhand, &pproc->exit_code) == FALSE) {
+ pproc->last_err = GetLastError();
+ pproc->lerrno = E_SCALL;
+ goto done;
+ }
+ child_dead = TRUE;
+
+ } else {
+
+ /* ?? Got back a handle we didn't query ?? */
+ pproc->last_err = 0;
+ pproc->lerrno = E_FAIL;
+ goto done;
+ }
+ }
+
+ done:
+ if (tStdin != 0)
+ CloseHandle(tStdin);
+ if (tStdout != 0)
+ CloseHandle(tStdout);
+ if (tStderr != 0)
+ CloseHandle(tStderr);
+
+ if (pproc->lerrno)
+ return(-1);
+ else
+ return(0);
+
+}
+
+/*
+ * Purpose: collects output from child process and returns results
+ *
+ * Description:
+ *
+ * Returns:
+ *
+ * Notes/Dependencies:
+ */
+ long
+process_file_io(
+ HANDLE proc)
+{
+ sub_process *pproc;
+ HANDLE childhand;
+ DWORD wait_return;
+
+ if (proc == NULL)
+ pproc = process_wait_for_any_private();
+ else
+ pproc = (sub_process *)proc;
+
+ /* some sort of internal error */
+ if (!pproc)
+ return -1;
+
+ childhand = (HANDLE) pproc->pid;
+
+ /*
+ * This function is poorly named, and could also be used just to wait
+ * for child death if you're doing your own pipe I/O. If that is
+ * the case, close the pipe handles here.
+ */
+ if (pproc->sv_stdin[0]) {
+ CloseHandle((HANDLE)pproc->sv_stdin[0]);
+ pproc->sv_stdin[0] = 0;
+ }
+ if (pproc->sv_stdout[0]) {
+ CloseHandle((HANDLE)pproc->sv_stdout[0]);
+ pproc->sv_stdout[0] = 0;
+ }
+ if (pproc->sv_stderr[0]) {
+ CloseHandle((HANDLE)pproc->sv_stderr[0]);
+ pproc->sv_stderr[0] = 0;
+ }
+
+ /*
+ * Wait for the child process to exit
+ */
+
+ wait_return = WaitForSingleObject(childhand, INFINITE);
+
+ if (wait_return != WAIT_OBJECT_0) {
+/* map_windows32_error_to_string(GetLastError());*/
+ pproc->last_err = GetLastError();
+ pproc->lerrno = E_SCALL;
+ goto done2;
+ }
+
+ if (GetExitCodeProcess(childhand, &pproc->exit_code) == FALSE) {
+ pproc->last_err = GetLastError();
+ pproc->lerrno = E_SCALL;
+ }
+
+done2:
+ if (pproc->lerrno)
+ return(-1);
+ else
+ return(0);
+
+}
+
+/*
+ * Description: Clean up any leftover handles, etc. It is up to the
+ * caller to manage and free the input, ouput, and stderr buffers.
+ */
+ void
+process_cleanup(
+ HANDLE proc)
+{
+ sub_process *pproc = (sub_process *)proc;
+ int i;
+
+ if (pproc->using_pipes) {
+ for (i= 0; i <= 1; i++) {
+ if ((HANDLE)pproc->sv_stdin[i])
+ CloseHandle((HANDLE)pproc->sv_stdin[i]);
+ if ((HANDLE)pproc->sv_stdout[i])
+ CloseHandle((HANDLE)pproc->sv_stdout[i]);
+ if ((HANDLE)pproc->sv_stderr[i])
+ CloseHandle((HANDLE)pproc->sv_stderr[i]);
+ }
+ }
+ if ((HANDLE)pproc->pid)
+ CloseHandle((HANDLE)pproc->pid);
+
+ free(pproc);
+}
+
+
+/*
+ * Description:
+ * Create a command line buffer to pass to CreateProcess
+ *
+ * Returns: the buffer or NULL for failure
+ * Shell case: sh_name a:/full/path/to/script argv[1] argv[2] ...
+ * Otherwise: argv[0] argv[1] argv[2] ...
+ *
+ * Notes/Dependencies:
+ * CreateProcess does not take an argv, so this command creates a
+ * command line for the executable.
+ */
+
+static char *
+make_command_line( char *shell_name, char *full_exec_path, char **argv)
+{
+ int argc = 0;
+ char** argvi;
+ int* enclose_in_quotes = NULL;
+ int* enclose_in_quotes_i;
+ unsigned int bytes_required = 0;
+ char* command_line;
+ char* command_line_i;
+
+ if (shell_name && full_exec_path) {
+ bytes_required
+ = strlen(shell_name) + 1 + strlen(full_exec_path);
+ /*
+ * Skip argv[0] if any, when shell_name is given.
+ */
+ if (*argv) argv++;
+ /*
+ * Add one for the intervening space.
+ */
+ if (*argv) bytes_required++;
+ }
+
+ argvi = argv;
+ while (*(argvi++)) argc++;
+
+ if (argc) {
+ enclose_in_quotes = (int*) calloc(1, argc * sizeof(int));
+
+ if (!enclose_in_quotes) {
+ return NULL;
+ }
+ }
+
+ /* We have to make one pass through each argv[i] to see if we need
+ * to enclose it in ", so we might as well figure out how much
+ * memory we'll need on the same pass.
+ */
+
+ argvi = argv;
+ enclose_in_quotes_i = enclose_in_quotes;
+ while(*argvi) {
+ char* p = *argvi;
+ unsigned int backslash_count = 0;
+
+ /*
+ * We have to enclose empty arguments in ".
+ */
+ if (!(*p)) *enclose_in_quotes_i = 1;
+
+ while(*p) {
+ switch (*p) {
+ case '\"':
+ /*
+ * We have to insert a backslash for each "
+ * and each \ that precedes the ".
+ */
+ bytes_required += (backslash_count + 1);
+ backslash_count = 0;
+ break;
+
+#ifndef HAVE_MKS_SHELL
+ case '\\':
+ backslash_count++;
+ break;
+#endif
+ /*
+ * At one time we set *enclose_in_quotes_i for '*' or '?' to suppress
+ * wildcard expansion in programs linked with MSVC's SETARGV.OBJ so
+ * that argv in always equals argv out. This was removed. Say you have
+ * such a program named glob.exe. You enter
+ * glob '*'
+ * at the sh command prompt. Obviously the intent is to make glob do the
+ * wildcarding instead of sh. If we set *enclose_in_quotes_i for '*' or '?',
+ * then the command line that glob would see would be
+ * glob "*"
+ * and the _setargv in SETARGV.OBJ would _not_ expand the *.
+ */
+ case ' ':
+ case '\t':
+ *enclose_in_quotes_i = 1;
+ /* fall through */
+
+ default:
+ backslash_count = 0;
+ break;
+ }
+
+ /*
+ * Add one for each character in argv[i].
+ */
+ bytes_required++;
+
+ p++;
+ }
+
+ if (*enclose_in_quotes_i) {
+ /*
+ * Add one for each enclosing ",
+ * and one for each \ that precedes the
+ * closing ".
+ */
+ bytes_required += (backslash_count + 2);
+ }
+
+ /*
+ * Add one for the intervening space.
+ */
+ if (*(++argvi)) bytes_required++;
+ enclose_in_quotes_i++;
+ }
+
+ /*
+ * Add one for the terminating NULL.
+ */
+ bytes_required++;
+
+ command_line = (char*) malloc(bytes_required);
+
+ if (!command_line) {
+ if (enclose_in_quotes) free(enclose_in_quotes);
+ return NULL;
+ }
+
+ command_line_i = command_line;
+
+ if (shell_name && full_exec_path) {
+ while(*shell_name) {
+ *(command_line_i++) = *(shell_name++);
+ }
+
+ *(command_line_i++) = ' ';
+
+ while(*full_exec_path) {
+ *(command_line_i++) = *(full_exec_path++);
+ }
+
+ if (*argv) {
+ *(command_line_i++) = ' ';
+ }
+ }
+
+ argvi = argv;
+ enclose_in_quotes_i = enclose_in_quotes;
+
+ while(*argvi) {
+ char* p = *argvi;
+ unsigned int backslash_count = 0;
+
+ if (*enclose_in_quotes_i) {
+ *(command_line_i++) = '\"';
+ }
+
+ while(*p) {
+ if (*p == '\"') {
+ /*
+ * We have to insert a backslash for the "
+ * and each \ that precedes the ".
+ */
+ backslash_count++;
+
+ while(backslash_count) {
+ *(command_line_i++) = '\\';
+ backslash_count--;
+ };
+#ifndef HAVE_MKS_SHELL
+ } else if (*p == '\\') {
+ backslash_count++;
+ } else {
+ backslash_count = 0;
+#endif
+ }
+
+ /*
+ * Copy the character.
+ */
+ *(command_line_i++) = *(p++);
+ }
+
+ if (*enclose_in_quotes_i) {
+#ifndef HAVE_MKS_SHELL
+ /*
+ * Add one \ for each \ that precedes the
+ * closing ".
+ */
+ while(backslash_count--) {
+ *(command_line_i++) = '\\';
+ };
+#endif
+ *(command_line_i++) = '\"';
+ }
+
+ /*
+ * Append an intervening space.
+ */
+ if (*(++argvi)) {
+ *(command_line_i++) = ' ';
+ }
+
+ enclose_in_quotes_i++;
+ }
+
+ /*
+ * Append the terminating NULL.
+ */
+ *command_line_i = '\0';
+
+ if (enclose_in_quotes) free(enclose_in_quotes);
+ return command_line;
+}
+
+/*
+ * Description: Given an argv and optional envp, launch the process
+ * using the default stdin, stdout, and stderr handles.
+ * Also, register process so that process_wait_for_any_private()
+ * can be used via process_file_io(NULL) or
+ * process_wait_for_any().
+ *
+ * Returns:
+ *
+ * Notes/Dependencies:
+ */
+HANDLE
+process_easy(
+ char **argv,
+ char **envp)
+{
+ HANDLE hIn;
+ HANDLE hOut;
+ HANDLE hErr;
+ HANDLE hProcess;
+
+ if (DuplicateHandle(GetCurrentProcess(),
+ GetStdHandle(STD_INPUT_HANDLE),
+ GetCurrentProcess(),
+ &hIn,
+ 0,
+ TRUE,
+ DUPLICATE_SAME_ACCESS) == FALSE) {
+ fprintf(stderr,
+ "process_easy: DuplicateHandle(In) failed (e=%d)\n",
+ GetLastError());
+ return INVALID_HANDLE_VALUE;
+ }
+ if (DuplicateHandle(GetCurrentProcess(),
+ GetStdHandle(STD_OUTPUT_HANDLE),
+ GetCurrentProcess(),
+ &hOut,
+ 0,
+ TRUE,
+ DUPLICATE_SAME_ACCESS) == FALSE) {
+ fprintf(stderr,
+ "process_easy: DuplicateHandle(Out) failed (e=%d)\n",
+ GetLastError());
+ return INVALID_HANDLE_VALUE;
+ }
+ if (DuplicateHandle(GetCurrentProcess(),
+ GetStdHandle(STD_ERROR_HANDLE),
+ GetCurrentProcess(),
+ &hErr,
+ 0,
+ TRUE,
+ DUPLICATE_SAME_ACCESS) == FALSE) {
+ fprintf(stderr,
+ "process_easy: DuplicateHandle(Err) failed (e=%d)\n",
+ GetLastError());
+ return INVALID_HANDLE_VALUE;
+ }
+
+ hProcess = process_init_fd(hIn, hOut, hErr);
+
+ if (process_begin(hProcess, argv, envp, argv[0], NULL)) {
+ fake_exits_pending++;
+ ((sub_process*) hProcess)->exit_code = process_last_err(hProcess);
+
+ /* close up unused handles */
+ CloseHandle(hIn);
+ CloseHandle(hOut);
+ CloseHandle(hErr);
+ }
+
+ process_register(hProcess);
+
+ return hProcess;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 22:04:30 +0000