diff options
Diffstat (limited to 'winsup/cygwin/spawn.cc')
| -rw-r--r-- | winsup/cygwin/spawn.cc | 1078 |
1 files changed, 0 insertions, 1078 deletions
diff --git a/winsup/cygwin/spawn.cc b/winsup/cygwin/spawn.cc deleted file mode 100644 index 72fb649bf..000000000 --- a/winsup/cygwin/spawn.cc +++ /dev/null @@ -1,1078 +0,0 @@ -/* spawn.cc - - Copyright 1996, 1997, 1998, 1999, 2000, 2001 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include <stdlib.h> -#include <stdarg.h> -#include <unistd.h> -#include <process.h> -#include <sys/wait.h> -#include <errno.h> -#include <limits.h> -#include <wingdi.h> -#include <winuser.h> -#include <ctype.h> -#include "cygerrno.h" -#include <sys/cygwin.h> -#include "perprocess.h" -#include "security.h" -#include "fhandler.h" -#include "path.h" -#include "dtable.h" -#include "sync.h" -#include "sigproc.h" -#include "cygheap.h" -#include "child_info.h" -#include "shared_info.h" -#include "pinfo.h" -#define NEED_VFORK -#include "perthread.h" -#include "registry.h" -#include "environ.h" - -#define LINE_BUF_CHUNK (MAX_PATH * 2) - -static suffix_info std_suffixes[] = -{ - suffix_info (".exe", 1), suffix_info ("", 1), - suffix_info (".com"), suffix_info (".cmd"), - suffix_info (".bat"), suffix_info (".dll"), - suffix_info (NULL) -}; - -HANDLE hExeced; - -/* Add .exe to PROG if not already present and see if that exists. - If not, return PROG (converted from posix to win32 rules if necessary). - The result is always BUF. - - Returns (possibly NULL) suffix */ - -static const char * -perhaps_suffix (const char *prog, path_conv &buf) -{ - char *ext; - - debug_printf ("prog '%s'", prog); - buf.check (prog, PC_SYM_FOLLOW | PC_FULL, std_suffixes); - - if (!buf.exists () || buf.isdir ()) - ext = NULL; - else if (buf.known_suffix) - ext = (char *) buf + (buf.known_suffix - buf.get_win32 ()); - else - ext = strchr (buf, '\0'); - - debug_printf ("buf %s, suffix found '%s'", (char *) buf, ext); - return ext; -} - -/* Find an executable name, possibly by appending known executable - suffixes to it. The win32-translated name is placed in 'buf'. - Any found suffix is returned in known_suffix. - - If the file is not found and !null_if_not_found then the win32 version - of name is placed in buf and returned. Otherwise the contents of buf - is undefined and NULL is returned. */ - -const char * __stdcall -find_exec (const char *name, path_conv& buf, const char *mywinenv, - unsigned opt, const char **known_suffix) -{ - const char *suffix = ""; - debug_printf ("find_exec (%s)", name); - char *retval = buf; - char tmp[MAX_PATH]; - const char *posix = (opt & FE_NATIVE) ? NULL : name; - bool has_slash = strchr (name, '/'); - - /* Check to see if file can be opened as is first. - Win32 systems always check . first, but PATH may not be set up to - do this. */ - if ((has_slash || opt & FE_CWD) - && (suffix = perhaps_suffix (name, buf)) != NULL) - { - if (posix && !has_slash) - { - tmp[0] = '.'; - tmp[1] = '/'; - strcpy (tmp + 2, name); - posix = tmp; - } - goto out; - } - - win_env *winpath; - const char *path; - const char *posix_path; - - /* Return the error condition if this is an absolute path or if there - is no PATH to search. */ - if (strchr (name, '/') || strchr (name, '\\') || - isdrive (name) || - !(winpath = getwinenv (mywinenv)) || - !(path = winpath->get_native ()) || - *path == '\0') - goto errout; - - debug_printf ("%s%s", mywinenv, path); - - posix = (opt & FE_NATIVE) ? NULL : tmp; - posix_path = winpath->get_posix () - 1; - /* Iterate over the specified path, looking for the file with and - without executable extensions. */ - do - { - posix_path++; - char *eotmp = strccpy (tmp, &path, ';'); - /* An empty path or '.' means the current directory, but we've - already tried that. */ - if (opt & FE_CWD && (tmp[0] == '\0' || (tmp[0] == '.' && tmp[1] == '\0'))) - continue; - - *eotmp++ = '\\'; - strcpy (eotmp, name); - - debug_printf ("trying %s", tmp); - - if ((suffix = perhaps_suffix (tmp, buf)) != NULL) - { - if (posix == tmp) - { - eotmp = strccpy (tmp, &posix_path, ':'); - if (eotmp == tmp) - *eotmp++ = '.'; - *eotmp++ = '/'; - strcpy (eotmp, name); - } - goto out; - } - } - while (*path && *++path && (posix_path = strchr (posix_path, ':'))); - - errout: - posix = NULL; - /* Couldn't find anything in the given path. - Take the appropriate action based on null_if_not_found. */ - if (opt & FE_NNF) - retval = NULL; - else if (opt & FE_NATIVE) - buf.check (name); - - out: - if (posix) - buf.set_path (posix); - debug_printf ("%s = find_exec (%s)", (char *) buf, name); - if (known_suffix) - *known_suffix = suffix ?: strchr (buf, '\0'); - return retval; -} - -/* Utility for spawn_guts. */ - -static HANDLE -handle (int n, int direction) -{ - fhandler_base *fh = cygheap->fdtab[n]; - - if (!fh) - return INVALID_HANDLE_VALUE; - if (fh->get_close_on_exec ()) - return INVALID_HANDLE_VALUE; - if (direction == 0) - return fh->get_handle (); - return fh->get_output_handle (); -} - -int -iscmd (const char *argv0, const char *what) -{ - int n; - n = strlen (argv0) - strlen (what); - if (n >= 2 && argv0[1] != ':') - return 0; - return n >= 0 && strcasematch (argv0 + n, what) && - (n == 0 || isdirsep (argv0[n - 1])); -} - -class linebuf -{ - public: - size_t ix; - char *buf; - size_t alloced; - linebuf () : ix (0), buf (NULL), alloced (0) {} - ~linebuf () {/* if (buf) free (buf);*/} - void add (const char *what, int len); - void add (const char *what) {add (what, strlen (what));} - void prepend (const char *what, int len); -}; - -void -linebuf::add (const char *what, int len) -{ - size_t newix; - if ((newix = ix + len) >= alloced || !buf) - { - alloced += LINE_BUF_CHUNK + newix; - buf = (char *) realloc (buf, alloced + 1); - } - memcpy (buf + ix, what, len); - ix = newix; - buf[ix] = '\0'; -} - -void -linebuf::prepend (const char *what, int len) -{ - int buflen; - size_t newix; - if ((newix = ix + len) >= alloced) - { - alloced += LINE_BUF_CHUNK + newix; - buf = (char *) realloc (buf, alloced + 1); - buf[ix] = '\0'; - } - if ((buflen = strlen (buf))) - memmove (buf + len, buf, buflen + 1); - else - buf[newix] = '\0'; - memcpy (buf, what, len); - ix = newix; -} - -class av -{ - char **argv; - int calloced; - public: - int argc; - av (int ac, const char * const *av) : calloced (0), argc (ac) - { - argv = (char **) cmalloc (HEAP_1_ARGV, (argc + 5) * sizeof (char *)); - memcpy (argv, av, (argc + 1) * sizeof (char *)); - } - ~av () - { - for (int i = 0; i < calloced; i++) - cfree (argv[i]); - cfree (argv); - } - int unshift (const char *what, int conv = 0); - operator char **() {return argv;} - void all_calloced () {calloced = argc;} - void replace0_maybe (const char *arg0) - { - /* Note: Assumes that argv array has not yet been "unshifted" */ - if (!calloced) - { - argv[0] = cstrdup1 (arg0); - calloced = 1; - } - } - void dup_maybe (int i) - { - if (i >= calloced) - argv[i] = cstrdup1 (argv[i]); - } - void dup_all () - { - for (int i = calloced; i < argc; i++) - argv[i] = cstrdup1 (argv[i]); - } -}; - -int -av::unshift (const char *what, int conv) -{ - char **av; - av = (char **) crealloc (argv, (argc + 2) * sizeof (char *)); - if (!av) - return 0; - - argv = av; - memmove (argv + 1, argv, (argc + 1) * sizeof (char *)); - char buf[MAX_PATH + 1]; - if (conv) - { - cygwin_conv_to_posix_path (what, buf); - char *p = strchr (buf, '\0') - 4; - if (p > buf && strcasematch (p, ".exe")) - *p = '\0'; - what = buf; - } - *argv = cstrdup1 (what); - argc++; - calloced++; - return 1; -} - -static int __stdcall -spawn_guts (HANDLE hToken, const char * prog_arg, const char *const *argv, - const char *const envp[], int mode) -{ - BOOL rc; - pid_t cygpid; - sigframe thisframe (mainthread); - - MALLOC_CHECK; - - if (prog_arg == NULL) - { - syscall_printf ("prog_arg is NULL"); - set_errno (EINVAL); - return -1; - } - - syscall_printf ("spawn_guts (%d, %.132s)", mode, prog_arg); - - if (argv == NULL) - { - syscall_printf ("argv is NULL"); - set_errno (EINVAL); - return (-1); - } - - path_conv real_path; - - linebuf one_line; - - STARTUPINFO si = {0, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL}; - - child_info_spawn ciresrv; - si.lpReserved2 = (LPBYTE) &ciresrv; - si.cbReserved2 = sizeof (ciresrv); - - DWORD chtype; - if (mode != _P_OVERLAY) - chtype = PROC_SPAWN; - else - chtype = PROC_EXEC; - - HANDLE spr; - if (chtype != PROC_EXEC) - spr = NULL; - else - { - spr = CreateEvent (&sec_all, TRUE, FALSE, NULL); - ProtectHandle (spr); - } - - init_child_info (chtype, &ciresrv, (mode == _P_OVERLAY) ? myself->pid : 1, - spr); - if (!DuplicateHandle (hMainProc, hMainProc, hMainProc, &ciresrv.parent, 0, 1, - DUPLICATE_SAME_ACCESS)) - { - system_printf ("couldn't create handle to myself for child, %E"); - return -1; - } - - ciresrv.moreinfo = (cygheap_exec_info *) ccalloc (HEAP_1_EXEC, 1, sizeof (cygheap_exec_info)); - ciresrv.moreinfo->old_title = NULL; - - /* CreateProcess takes one long string that is the command line (sigh). - We need to quote any argument that has whitespace or embedded "'s. */ - - int ac; - for (ac = 0; argv[ac]; ac++) - /* nothing */; - - av newargv (ac, argv); - - int null_app_name = 0; - if (ac == 3 && argv[1][0] == '/' && argv[1][1] == 'c' && - (iscmd (argv[0], "command.com") || iscmd (argv[0], "cmd.exe"))) - { - real_path.check (prog_arg); - one_line.add ("\""); - if (!real_path.error) - one_line.add (real_path); - else - one_line.add (argv[0]); - one_line.add ("\""); - one_line.add (" "); - one_line.add (argv[1]); - one_line.add (" "); - one_line.add (argv[2]); - strcpy (real_path, argv[0]); - null_app_name = 1; - goto skip_arg_parsing; - } - - const char *ext; - if ((ext = perhaps_suffix (prog_arg, real_path)) == NULL) - { - set_errno (ENOENT); - return -1; - } - - MALLOC_CHECK; - - /* If the file name ends in either .exe, .com, .bat, or .cmd we assume - that it is NOT a script file */ - while (*ext == '\0') - { - HANDLE hnd = CreateFileA (real_path, - GENERIC_READ, - FILE_SHARE_READ | FILE_SHARE_WRITE, - &sec_none_nih, - OPEN_EXISTING, - FILE_ATTRIBUTE_NORMAL, - 0); - if (hnd == INVALID_HANDLE_VALUE) - { - __seterrno (); - return -1; - } - - DWORD done; - - char buf[2 * MAX_PATH + 1]; - buf[0] = buf[1] = buf[2] = buf[sizeof (buf) - 1] = '\0'; - if (!ReadFile (hnd, buf, sizeof (buf) - 1, &done, 0)) - { - CloseHandle (hnd); - __seterrno (); - return -1; - } - - CloseHandle (hnd); - - if (buf[0] == 'M' && buf[1] == 'Z') - break; - - debug_printf ("%s is a script", (char *) real_path); - - char *pgm, *arg1; - - if (buf[0] != '#' || buf[1] != '!') - { - pgm = (char *) "/bin/sh"; - arg1 = NULL; - } - else - { - char *ptr; - pgm = buf + 2; - pgm += strspn (pgm, " \t"); - for (ptr = pgm, arg1 = NULL; - *ptr && *ptr != '\r' && *ptr != '\n'; - ptr++) - if (!arg1 && (*ptr == ' ' || *ptr == '\t')) - { - /* Null terminate the initial command and step over - any additional white space. If we've hit the - end of the line, exit the loop. Otherwise, we've - found the first argument. Position the current - pointer on the last known white space. */ - *ptr = '\0'; - char *newptr = ptr + 1; - newptr += strspn (newptr, " \t"); - if (!*newptr || *newptr == '\r' || *newptr == '\n') - break; - arg1 = newptr; - ptr = newptr - 1; - } - - *ptr = '\0'; - } - - /* Replace argv[0] with the full path to the script if this is the - first time through the loop. */ - newargv.replace0_maybe (prog_arg); - - /* pointers: - * pgm interpreter name - * arg1 optional string - */ - if (arg1) - newargv.unshift (arg1); - - /* FIXME: This should not be using FE_NATIVE. It should be putting - the posix path on the argv list. */ - find_exec (pgm, real_path, "PATH=", FE_NATIVE, &ext); - newargv.unshift (real_path, 1); - } - - if (real_path.iscygexec ()) - newargv.dup_all (); - else - { - for (int i = 0; i < newargv.argc; i++) - { - char *p = NULL; - const char *a; - - newargv.dup_maybe (i); - a = i ? newargv[i] : (char *) real_path; - int len = strlen (a); - if (len != 0 && !strpbrk (a, " \t\n\r\"")) - one_line.add (a, len); - else - { - one_line.add ("\"", 1); - /* Handle embedded special characters " and \. - A " is always preceded by a \. - A \ is not special unless it precedes a ". If it does, - then all preceding \'s must be doubled to avoid having - the Windows command line parser interpret the \ as quoting - the ". This rule applies to a string of \'s before the end - of the string, since cygwin/windows uses a " to delimit the - argument. */ - for (; (p = strpbrk (a, "\"\\")); a = ++p) - { - one_line.add (a, p - a); - /* Find length of string of backslashes */ - int n = strspn (p, "\\"); - if (!n) - one_line.add ("\\\"", 2); /* No backslashes, so it must be a ". - The " has to be protected with a backslash. */ - else - { - one_line.add (p, n); /* Add the run of backslashes */ - /* Need to double up all of the preceding - backslashes if they precede a quote or EOS. */ - if (!p[n] || p[n] == '"') - one_line.add (p, n); - p += n - 1; /* Point to last backslash */ - } - } - if (*a) - one_line.add (a); - one_line.add ("\"", 1); - } - MALLOC_CHECK; - one_line.add (" ", 1); - MALLOC_CHECK; - } - - MALLOC_CHECK; - if (one_line.ix) - one_line.buf[one_line.ix - 1] = '\0'; - else - one_line.add ("", 1); - MALLOC_CHECK; - } - - newargv.all_calloced (); - ciresrv.moreinfo->argc = newargv.argc; - ciresrv.moreinfo->argv = newargv; - - ciresrv.moreinfo->envc = envsize (envp, 1); - ciresrv.moreinfo->envp = (char **) cmalloc (HEAP_1_ARGV, ciresrv.moreinfo->envc); - ciresrv.hexec_proc = hexec_proc; - char **c; - const char * const *e; - for (c = ciresrv.moreinfo->envp, e = envp; *e;) - *c++ = cstrdup1 (*e++); - *c = NULL; - if (mode != _P_OVERLAY || - !DuplicateHandle (hMainProc, myself.shared_handle (), hMainProc, - &ciresrv.moreinfo->myself_pinfo, 0, - TRUE, DUPLICATE_SAME_ACCESS)) - ciresrv.moreinfo->myself_pinfo = NULL; - - skip_arg_parsing: - PROCESS_INFORMATION pi = {NULL, 0, 0, 0}; - si.lpReserved = NULL; - si.lpDesktop = NULL; - si.dwFlags = STARTF_USESTDHANDLES; - si.hStdInput = handle (0, 0); /* Get input handle */ - si.hStdOutput = handle (1, 1); /* Get output handle */ - si.hStdError = handle (2, 1); /* Get output handle */ - si.cb = sizeof (si); - - int flags = CREATE_DEFAULT_ERROR_MODE | GetPriorityClass (hMainProc); - - if (mode == _P_DETACH || !set_console_state_for_spawn ()) - flags |= DETACHED_PROCESS; - if (mode != _P_OVERLAY) - flags |= CREATE_SUSPENDED; - - /* Some file types (currently only sockets) need extra effort in the - parent after CreateProcess and before copying the datastructures - to the child. So we have to start the child in suspend state, - unfortunately, to avoid a race condition. */ - if (cygheap->fdtab.need_fixup_before ()) - flags |= CREATE_SUSPENDED; - - - /* Build windows style environment list */ - char *envblock; - if (real_path.iscygexec ()) - envblock = NULL; - else - envblock = winenv (envp, 0); - - /* Preallocated buffer for `sec_user' call */ - char sa_buf[1024]; - - if (!hToken && cygheap->user.impersonated - && cygheap->user.token != INVALID_HANDLE_VALUE) - hToken = cygheap->user.token; - - const char *runpath = null_app_name ? NULL : (const char *) real_path; - - syscall_printf ("spawn_guts null_app_name %d (%s, %.132s)", null_app_name, runpath, one_line.buf); - - void *newheap; - cygbench ("spawn-guts"); - if (!hToken) - { - ciresrv.moreinfo->uid = getuid (); - /* FIXME: This leaks a handle in the CreateProcessAsUser case since the - child process doesn't know about cygwin_mount_h. */ - ciresrv.mount_h = cygwin_mount_h; - newheap = cygheap_setup_for_child (&ciresrv, cygheap->fdtab.need_fixup_before ()); - rc = CreateProcess (runpath, /* image name - with full path */ - one_line.buf, /* what was passed to exec */ - /* process security attrs */ - allow_ntsec ? sec_user (sa_buf) : &sec_all_nih, - /* thread security attrs */ - allow_ntsec ? sec_user (sa_buf) : &sec_all_nih, - TRUE, /* inherit handles from parent */ - flags, - envblock,/* environment */ - 0, /* use current drive/directory */ - &si, - &pi); - } - else - { - cygsid sid; - DWORD ret_len; - if (!GetTokenInformation (hToken, TokenUser, &sid, sizeof sid, &ret_len)) - { - sid = NO_SID; - system_printf ("GetTokenInformation: %E"); - } - /* Retrieve security attributes before setting psid to NULL - since it's value is needed by `sec_user'. */ - PSECURITY_ATTRIBUTES sec_attribs = allow_ntsec && sid - ? sec_user (sa_buf, sid) - : &sec_all_nih; - - /* Remove impersonation */ - if (cygheap->user.impersonated - && cygheap->user.token != INVALID_HANDLE_VALUE) - RevertToSelf (); - - static BOOL first_time = TRUE; - if (first_time) - { - set_process_privilege (SE_RESTORE_NAME); - first_time = FALSE; - } - - /* Load users registry hive. */ - load_registry_hive (sid); - - /* allow the child to interact with our window station/desktop */ - HANDLE hwst, hdsk; - SECURITY_INFORMATION dsi = DACL_SECURITY_INFORMATION; - DWORD n; - char wstname[1024]; - char dskname[1024]; - - ciresrv.moreinfo->uid = USHRT_MAX; - hwst = GetProcessWindowStation (); - SetUserObjectSecurity (hwst, &dsi, get_null_sd ()); - GetUserObjectInformation (hwst, UOI_NAME, wstname, 1024, &n); - hdsk = GetThreadDesktop (GetCurrentThreadId ()); - SetUserObjectSecurity (hdsk, &dsi, get_null_sd ()); - GetUserObjectInformation (hdsk, UOI_NAME, dskname, 1024, &n); - strcat (wstname, "\\"); - strcat (wstname, dskname); - si.lpDesktop = wstname; - - newheap = cygheap_setup_for_child (&ciresrv, cygheap->fdtab.need_fixup_before ()); - rc = CreateProcessAsUser (hToken, - runpath, /* image name - with full path */ - one_line.buf, /* what was passed to exec */ - sec_attribs, /* process security attrs */ - sec_attribs, /* thread security attrs */ - TRUE, /* inherit handles from parent */ - flags, - envblock,/* environment */ - 0, /* use current drive/directory */ - &si, - &pi); - /* Restore impersonation. In case of _P_OVERLAY this isn't - allowed since it would overwrite child data. */ - if (mode != _P_OVERLAY - && cygheap->user.impersonated - && cygheap->user.token != INVALID_HANDLE_VALUE) - ImpersonateLoggedOnUser (cygheap->user.token); - } - - MALLOC_CHECK; - if (envblock) - free (envblock); - MALLOC_CHECK; - - /* Set errno now so that debugging messages from it appear before our - final debugging message [this is a general rule for debugging - messages]. */ - if (!rc) - { - __seterrno (); - syscall_printf ("CreateProcess failed, %E"); - if (spr) - ForceCloseHandle (spr); - cygheap_setup_for_child_cleanup (newheap, &ciresrv, 0); - return -1; - } - - /* Fixup the parent datastructure if needed and resume the child's - main thread. */ - if (!cygheap->fdtab.need_fixup_before ()) - cygheap_setup_for_child_cleanup (newheap, &ciresrv, 0); - else - { - cygheap->fdtab.fixup_before_exec (pi.dwProcessId); - cygheap_setup_for_child_cleanup (newheap, &ciresrv, 1); - if (mode == _P_OVERLAY) - ResumeThread (pi.hThread); - } - - if (mode == _P_OVERLAY) - cygpid = myself->pid; - else - cygpid = cygwin_pid (pi.dwProcessId); - - /* We print the original program name here so the user can see that too. */ - syscall_printf ("%d = spawn_guts (%s, %.132s)", - rc ? cygpid : (unsigned int) -1, prog_arg, one_line.buf); - - /* Name the handle similarly to proc_subproc. */ - ProtectHandle1 (pi.hProcess, childhProc); - - if (mode == _P_OVERLAY) - { - /* These are both duplicated in the child code. We do this here, - primarily for strace. */ - strace.execing = 1; - hExeced = pi.hProcess; - strcpy (myself->progname, real_path); - close_all_files (); - } - else - { - myself->set_has_pgid_children (); - ProtectHandle (pi.hThread); - pinfo child (cygpid, 1); - if (!child) - { - set_errno (EAGAIN); - syscall_printf ("-1 = spawnve (), process table full"); - return -1; - } - child->dwProcessId = pi.dwProcessId; - child->hProcess = pi.hProcess; - child.remember (); - strcpy (child->progname, real_path); - /* FIXME: This introduces an unreferenced, open handle into the child. - The purpose is to keep the pid shared memory open so that all of - the fields filled out by child.remember do not disappear and so there - is not a brief period during which the pid is not available. - However, we should try to find another way to do this eventually. */ - (void) DuplicateHandle (hMainProc, child.shared_handle (), pi.hProcess, - NULL, 0, 0, DUPLICATE_SAME_ACCESS); - /* Start the child running */ - ResumeThread (pi.hThread); - } - - ForceCloseHandle (pi.hThread); - - sigproc_printf ("spawned windows pid %d", pi.dwProcessId); - - if (hToken && hToken != cygheap->user.token) - CloseHandle (hToken); - - DWORD res; - BOOL exited; - - res = 0; - exited = FALSE; - MALLOC_CHECK; - if (mode == _P_OVERLAY) - { - int nwait = 3; - HANDLE waitbuf[3] = {pi.hProcess, signal_arrived, spr}; - for (int i = 0; i < 100; i++) - { - switch (WaitForMultipleObjects (nwait, waitbuf, FALSE, INFINITE)) - { - case WAIT_OBJECT_0: - sigproc_printf ("subprocess exited"); - DWORD exitcode; - if (!GetExitCodeProcess (pi.hProcess, &exitcode)) - exitcode = 1; - res |= exitcode; - exited = TRUE; - break; - case WAIT_OBJECT_0 + 1: - sigproc_printf ("signal arrived"); - reset_signal_arrived (); - continue; - case WAIT_OBJECT_0 + 2: - if (myself->ppid_handle) - res |= EXIT_REPARENTING; - if (!my_parent_is_alive ()) - { - nwait = 2; - sigproc_terminate (); - continue; - } - break; - case WAIT_FAILED: - system_printf ("wait failed: nwait %d, pid %d, winpid %d, %E", - nwait, myself->pid, myself->dwProcessId); - system_printf ("waitbuf[0] %p %d", waitbuf[0], - WaitForSingleObject (waitbuf[0], 0)); - system_printf ("waitbuf[1] %p = %d", waitbuf[1], - WaitForSingleObject (waitbuf[1], 0)); - system_printf ("waitbuf[w] %p = %d", waitbuf[2], - WaitForSingleObject (waitbuf[2], 0)); - set_errno (ECHILD); - try_to_debug (); - return -1; - } - break; - } - - ForceCloseHandle (spr); - - sigproc_printf ("res = %x", res); - - if (res & EXIT_REPARENTING) - { - /* Try to reparent child process. - * Make handles to child available to parent process and exit with - * EXIT_REPARENTING status. Wait() syscall in parent will then wait - * for newly created child. - */ - HANDLE oldh = myself->hProcess; - HANDLE h = myself->ppid_handle; - sigproc_printf ("parent handle %p", h); - int rc = DuplicateHandle (hMainProc, pi.hProcess, h, &myself->hProcess, - 0, FALSE, DUPLICATE_SAME_ACCESS); - sigproc_printf ("%d = DuplicateHandle, oldh %p, newh %p", - rc, oldh, myself->hProcess); - if (!rc && my_parent_is_alive ()) - { - system_printf ("Reparent failed, parent handle %p, %E", h); - system_printf ("my dwProcessId %d, myself->dwProcessId %d", - GetCurrentProcessId (), myself->dwProcessId); - system_printf ("old hProcess %p, hProcess %p", oldh, myself->hProcess); - } - } - - } - - MALLOC_CHECK; - - switch (mode) - { - case _P_OVERLAY: - ForceCloseHandle1 (pi.hProcess, childhProc); - proc_terminate (); - myself->exit (res, 1); - break; - case _P_WAIT: - waitpid (cygpid, (int *) &res, 0); - break; - case _P_DETACH: - res = 0; /* Lose all memory of this child. */ - break; - case _P_NOWAIT: - case _P_NOWAITO: - case _P_VFORK: - res = cygpid; - break; - default: - break; - } - - return (int) res; -} - -extern "C" int -cwait (int *result, int pid, int) -{ - return waitpid (pid, result, 0); -} - -/* - * Helper function for spawn runtime calls. - * Doesn't search the path. - */ - -extern "C" int -_spawnve (HANDLE hToken, int mode, const char *path, const char *const *argv, - const char *const *envp) -{ - int ret; - vfork_save *vf = vfork_storage.val (); - - if (vf != NULL && (vf->pid < 0) && mode == _P_OVERLAY) - mode = _P_NOWAIT; - else - vf = NULL; - - syscall_printf ("_spawnve (%s, %s, %x)", path, argv[0], envp); - - switch (mode) - { - case _P_OVERLAY: - /* We do not pass _P_SEARCH_PATH here. execve doesn't search PATH.*/ - /* Just act as an exec if _P_OVERLAY set. */ - spawn_guts (hToken, path, argv, envp, mode); - /* Errno should be set by spawn_guts. */ - ret = -1; - break; - case _P_VFORK: - case _P_NOWAIT: - case _P_NOWAITO: - case _P_WAIT: - case _P_DETACH: - subproc_init (); - ret = spawn_guts (hToken, path, argv, envp, mode); - if (vf && ret > 0) - { - debug_printf ("longjmping due to vfork"); - vf->pid = ret; - longjmp (vf->j, 1); - } - break; - default: - set_errno (EINVAL); - ret = -1; - break; - } - return ret; -} - -/* - * spawn functions as implemented in the MS runtime library. - * Most of these based on (and copied from) newlib/libc/posix/execXX.c - */ - -extern "C" int -spawnl (int mode, const char *path, const char *arg0, ...) -{ - int i; - va_list args; - const char *argv[256]; - - va_start (args, arg0); - argv[0] = arg0; - i = 1; - - do - argv[i] = va_arg (args, const char *); - while (argv[i++] != NULL); - - va_end (args); - - return _spawnve (NULL, mode, path, (char * const *) argv, cur_environ ()); -} - -extern "C" int -spawnle (int mode, const char *path, const char *arg0, ...) -{ - int i; - va_list args; - const char * const *envp; - const char *argv[256]; - - va_start (args, arg0); - argv[0] = arg0; - i = 1; - - do - argv[i] = va_arg (args, const char *); - while (argv[i++] != NULL); - - envp = va_arg (args, const char * const *); - va_end (args); - - return _spawnve (NULL, mode, path, (char * const *) argv, - (char * const *) envp); -} - -extern "C" int -spawnlp (int mode, const char *path, const char *arg0, ...) -{ - int i; - va_list args; - const char *argv[256]; - - va_start (args, arg0); - argv[0] = arg0; - i = 1; - - do - argv[i] = va_arg (args, const char *); - while (argv[i++] != NULL); - - va_end (args); - - return spawnvpe (mode, path, (char * const *) argv, cur_environ ()); -} - -extern "C" int -spawnlpe (int mode, const char *path, const char *arg0, ...) -{ - int i; - va_list args; - const char * const *envp; - const char *argv[256]; - - va_start (args, arg0); - argv[0] = arg0; - i = 1; - - do - argv[i] = va_arg (args, const char *); - while (argv[i++] != NULL); - - envp = va_arg (args, const char * const *); - va_end (args); - - return spawnvpe (mode, path, (char * const *) argv, envp); -} - -extern "C" int -spawnv (int mode, const char *path, const char * const *argv) -{ - return _spawnve (NULL, mode, path, argv, cur_environ ()); -} - -extern "C" int -spawnve (int mode, const char *path, char * const *argv, - const char * const *envp) -{ - return _spawnve (NULL, mode, path, argv, envp); -} - -extern "C" int -spawnvp (int mode, const char *path, const char * const *argv) -{ - return spawnvpe (mode, path, argv, cur_environ ()); -} - -extern "C" int -spawnvpe (int mode, const char *file, const char * const *argv, - const char * const *envp) -{ - path_conv buf; - return _spawnve (NULL, mode, find_exec (file, buf), argv, envp); -} |