diff options
Diffstat (limited to 'winsup/cygwin/spawn.cc')
| -rw-r--r-- | winsup/cygwin/spawn.cc | 980 |
1 files changed, 980 insertions, 0 deletions
diff --git a/winsup/cygwin/spawn.cc b/winsup/cygwin/spawn.cc new file mode 100644 index 0000000..5100319 --- /dev/null +++ b/winsup/cygwin/spawn.cc @@ -0,0 +1,980 @@ +/* spawn.cc + + Copyright 1996, 1997, 1998, 1999, 2000 Cygnus Solutions. + +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 <stdlib.h> +#include <stdarg.h> +#include <unistd.h> +#include <process.h> +#include <sys/wait.h> +#include <errno.h> +#include <limits.h> +#include "winsup.h" +#include <ctype.h> +#include "paths.h" + +extern BOOL allow_ntsec; + +#define LINE_BUF_CHUNK (MAX_PATH * 2) + +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) +}; + +/* 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, char *buf) +{ + char *ext; + + debug_printf ("prog '%s'", prog); + path_conv temp (prog, SYMLINK_FOLLOW, 1, std_suffixes); + strcpy (buf, temp.get_win32 ()); + + if (temp.file_attributes () & FILE_ATTRIBUTE_DIRECTORY) + ext = NULL; + else if (temp.known_suffix) + ext = buf + (temp.known_suffix - temp.get_win32 ()); + else + ext = strchr (buf, '\0'); + + debug_printf ("buf %s, suffix found '%s'", 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, char *buf, const char *mywinenv, + int null_if_notfound, const char **known_suffix) +{ + const char *suffix = ""; + debug_printf ("find_exec (%s)", name); + char *retval = buf; + + /* 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 ((suffix = perhaps_suffix (name, buf)) != NULL) + goto out; + + win_env *winpath; + const char *path; + char tmp[MAX_PATH]; + + /* Return the error condition if this is an absolute path or if there + is no PATH to search. */ + if (strchr (name, '/') || strchr (name, '\\') || + isalpha (name[0]) && name[1] == ':' || + !(winpath = getwinenv (mywinenv)) || + !(path = winpath->get_native ()) || + *path == '\0') + goto errout; + + debug_printf ("%s%s", mywinenv, path); + + /* Iterate over the specified path, looking for the file with and + without executable extensions. */ + do + { + char *eotmp = strccpy (tmp, &path, ';'); + /* An empty path or '.' means the current directory, but we've + already tried that. */ + if (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) + goto out; + } + while (*path && *++path); + +errout: + /* Couldn't find anything in the given path. + Take the appropriate action based on null_if_not_found. */ + if (null_if_notfound) + retval = NULL; + else + strcpy (buf, path_conv (name).get_win32 ()); + +out: + debug_printf ("%s = find_exec (%s)", 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 = dtable[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 (); +} + +/* Cover function for CreateProcess. + + This function is used by both the routines that search $PATH and those + that do not. This should work out ok as according to the documentation, + CreateProcess only searches $PATH if PROG has no directory elements. + + Spawning doesn't fit well with Posix's fork/exec (one can argue the merits + of either but that's beside the point). If we're exec'ing we want to + record the child pid for fork. If we're spawn'ing we don't want to do + this. It is up to the caller to handle both cases. + + The result is the process id. The handle of the created process is + stored in H. +*/ + +HANDLE NO_COPY hExeced = NULL; +DWORD NO_COPY exec_exit = 0; + +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 && strcasecmp (argv0 + n, what) == 0 && + (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; +} + +int __stdcall +spawn_guts (HANDLE hToken, const char * prog_arg, const char *const *argv, + const char *const envp[], pinfo *child, int mode) +{ + int i; + BOOL rc; + int argc; + + hExeced = NULL; + + MALLOC_CHECK; + + if (prog_arg == NULL) + { + syscall_printf ("prog_arg is NULL"); + set_errno(EINVAL); + return -1; + } + + syscall_printf ("spawn_guts (%.132s)", prog_arg); + + if (argv == NULL) + { + syscall_printf ("argv is NULL"); + set_errno(EINVAL); + return (-1); + } + + /* CreateProcess takes one long string that is the command line (sigh). + We need to quote any argument that has whitespace or embedded "'s. */ + + for (argc = 0; argv[argc]; argc++) + /* nothing */; + + char *real_path; + char real_path_buf[MAX_PATH]; + + linebuf one_line; + + if (argc == 3 && argv[1][0] == '/' && argv[1][1] == 'c' && + (iscmd (argv[0], "command.com") || iscmd (argv[0], "cmd.exe"))) + { + one_line.add (argv[0]); + one_line.add (" "); + one_line.add (argv[1]); + one_line.add (" "); + real_path = NULL; + one_line.add (argv[2]); + strcpy (real_path_buf, argv[0]); + goto skip_arg_parsing; + } + + MALLOC_CHECK; + + real_path = real_path_buf; + + const char *saved_prog_arg; + const char *newargv0, **firstarg; + const char *ext; + + if ((ext = perhaps_suffix (prog_arg, real_path)) == NULL) + { + set_errno (ENOENT); + return -1; + } + + MALLOC_CHECK; + saved_prog_arg = prog_arg; + newargv0 = argv[0]; + firstarg = &newargv0; + + /* 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", prog_arg); + + char *ptr, *pgm, *arg1; + + if (buf[0] != '#' || buf[1] != '!') + { + strcpy (buf, "sh"); /* shell script without magic */ + pgm = buf; + ptr = buf + 2; + arg1 = NULL; + } + else + { + 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, position + 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'; + } + + char buf2[MAX_PATH + 1]; + + /* pointers: + * pgm interpreter name + * arg1 optional string + * ptr end of string + */ + + if (!arg1) + one_line.prepend (" ", 1); + else + { + one_line.prepend ("\" ", 2); + one_line.prepend (arg1, strlen (arg1)); + one_line.prepend (" \"", 2); + } + + find_exec (pgm, real_path, "PATH=", 0, &ext); + cygwin_conv_to_posix_path (real_path, buf2); + one_line.prepend (buf2, strlen (buf2)); + + /* If script had absolute path, add it to script name now! + * This is necessary if script has been found via PATH. + * For example, /usr/local/bin/tkman started as "tkman": + * #!/usr/local/bin/wish -f + * ... + * We should run /usr/local/bin/wish -f /usr/local/bin/tkman, + * but not /usr/local/bin/wish -f tkman! + * We don't modify anything, if script has qulified path. + */ + if (firstarg) + *firstarg = saved_prog_arg; + + debug_printf ("prog_arg '%s', copy '%s'", prog_arg, one_line.buf); + firstarg = NULL; + } + + for (; *argv; argv++) + { + char *p = NULL; + const char *a = newargv0 ?: *argv; + + MALLOC_CHECK; + + newargv0 = NULL; + int len = strlen (a); + if (len != 0 && !(p = strpbrk (a, " \t\n\r\""))) + one_line.add (a, len); + else + { + one_line.add ("\"", 1); + for (; p; a = p, p = strchr (p, '"')) + { + one_line.add (a, ++p - a); + if (p[-1] == '"') + one_line.add ("\"", 1); + } + 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; + +skip_arg_parsing: + PROCESS_INFORMATION pi = {0}; + + STARTUPINFO si = {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); + + /* Pass fd table to a child */ + + MALLOC_CHECK; + int len = dtable.linearize_fd_array (0, 0); + MALLOC_CHECK; + if (len == -1) + { + system_printf ("FATAL error in linearize_fd_array"); + return -1; + } + int titlelen = 1 + (old_title && mode == _P_OVERLAY ? strlen (old_title) : 0); + si.cbReserved2 = len + titlelen + sizeof(child_info); + si.lpReserved2 = (LPBYTE) alloca (si.cbReserved2); + +# define ciresrv ((child_info *)si.lpReserved2) + HANDLE spr = NULL; + DWORD chtype; + if (mode != _P_OVERLAY) + chtype = PROC_SPAWN; + else + { + spr = CreateEvent(&sec_all, TRUE, FALSE, NULL); + ProtectHandle (spr); + chtype = PROC_EXEC; + } + + init_child_info (chtype, ciresrv, child->pid, spr); + + LPBYTE resrv = si.lpReserved2 + sizeof *ciresrv; +# undef ciresrv + + if (dtable.linearize_fd_array (resrv, len) < 0) + { + system_printf ("FATAL error in second linearize_fd_array"); + return -1; + } + + if (titlelen > 1) + strcpy ((char *) resrv + len, old_title); + else + resrv[len] = '\0'; + + /* We print the translated program and arguments here so the user can see + what was done to it. */ + syscall_printf ("spawn_guts (%s, %.132s)", real_path, one_line.buf); + + int flags = CREATE_DEFAULT_ERROR_MODE | CREATE_SUSPENDED | + GetPriorityClass (hMainProc); + + if (mode == _P_DETACH || !set_console_state_for_spawn ()) + flags |= DETACHED_PROCESS; + + MALLOC_CHECK; + /* Build windows style environment list */ + char *envblock = winenv (envp); + MALLOC_CHECK; + + /* Preallocated buffer for `sec_user' call */ + char sa_buf[1024]; + + if (hToken) + { + /* 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]; + + 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; + /* force the new process to reread /etc/passwd and /etc/group */ + child->uid = USHRT_MAX; + child->username[0] = '\0'; + + char tu[1024]; + PSID sid = NULL; + DWORD ret_len; + if (GetTokenInformation (hToken, TokenUser, + (LPVOID) &tu, sizeof tu, + &ret_len)) + sid = ((TOKEN_USER *) &tu)->User.Sid; + else + system_printf ("GetTokenInformation: %E"); + + rc = CreateProcessAsUser (hToken, + real_path, /* image name - with full path */ + one_line.buf, /* what was passed to exec */ + /* process security attrs */ + allow_ntsec && sid ? sec_user (sa_buf, sid) + : &sec_all_nih, + /* thread security attrs */ + allow_ntsec && sid ? sec_user (sa_buf, sid) + : &sec_all_nih, + TRUE, /* inherit handles from parent */ + flags, + envblock,/* environment */ + 0, /* use current drive/directory */ + &si, + &pi); + } + else + rc = CreateProcessA (real_path, /* 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); + + MALLOC_CHECK; + 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 (); + + MALLOC_CHECK; + /* Name the handle similarly to proc_subproc. */ + ProtectHandle1 (pi.hProcess, childhProc); + ProtectHandle (pi.hThread); + MALLOC_CHECK; + + /* We print the original program name here so the user can see that too. */ + syscall_printf ("%d = spawn_guts (%s, %.132s)", + rc ? pi.dwProcessId : (unsigned int) -1, + prog_arg, one_line.buf); + + if (!rc) + { + if (spr) + ForceCloseHandle (spr); + return -1; + } + + /* Set up child's signal handlers */ + for (i = 0; i < NSIG; i++) + { + child->getsig(i).sa_mask = 0; + if (myself->getsig(i).sa_handler != SIG_IGN || (mode != _P_OVERLAY)) + child->getsig(i).sa_handler = SIG_DFL; + } + + if (mode == _P_OVERLAY) + { + close_all_files (); + strcpy (child->progname, real_path_buf); + proc_terminate (); + hExeced = pi.hProcess; + } + else + { + child->dwProcessId = pi.dwProcessId; + child->hProcess = pi.hProcess; + child->process_state |= PID_INITIALIZING; + proc_register (child); + } + + sigproc_printf ("spawned windows pid %d", pi.dwProcessId); + /* Start the child running */ + ResumeThread (pi.hThread); + ForceCloseHandle (pi.hThread); + + if (hToken) + CloseHandle (hToken); + + DWORD res; + + if (mode == _P_OVERLAY) + { + BOOL exited; + + HANDLE waitbuf[3] = {pi.hProcess, signal_arrived, spr}; + int nwait = 3; + + SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_HIGHEST); + res = 0; + DWORD timeout = INFINITE; + exec_exit = 1; + exited = FALSE; + MALLOC_CHECK; + waitfor: + switch (WaitForMultipleObjects (nwait, waitbuf, FALSE, timeout)) + { + case WAIT_TIMEOUT: + syscall_printf ("WFMO timed out after signal"); + if (WaitForSingleObject (pi.hProcess, 0) != WAIT_OBJECT_0) + { + sigproc_printf ("subprocess still alive after signal"); + res = exec_exit; + } + else + { + sigproc_printf ("subprocess exited after signal"); + case WAIT_OBJECT_0: + sigproc_printf ("subprocess exited"); + if (!GetExitCodeProcess (pi.hProcess, &res)) + res = exec_exit; + exited = TRUE; + } + if (nwait > 2) + if (WaitForSingleObject (spr, 1) == WAIT_OBJECT_0) + res |= EXIT_REPARENTING; + else if (!(res & EXIT_REPARENTING)) + { + MALLOC_CHECK; + close_all_files (); + MALLOC_CHECK; + } + break; + case WAIT_OBJECT_0 + 1: + sigproc_printf ("signal arrived"); + timeout = 10; + goto waitfor; + case WAIT_OBJECT_0 + 2: + res = EXIT_REPARENTING; + MALLOC_CHECK; + ForceCloseHandle (spr); + MALLOC_CHECK; + if (!parent_alive) + { + nwait = 1; + sigproc_terminate (); + goto waitfor; + } + break; + case WAIT_FAILED: + DWORD r; + system_printf ("wait failed: nwait %d, pid %d, winpid %d, %E", + nwait, myself->pid, myself->dwProcessId); + system_printf ("waitbuf[0] %p %d", waitbuf[0], + GetHandleInformation (waitbuf[0], &r)); + system_printf ("waitbuf[1] %p = %d", waitbuf[1], + GetHandleInformation (waitbuf[1], &r)); + set_errno (ECHILD); + return -1; + } + + if (nwait > 2) + 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. + */ + if (my_parent_is_alive ()) + { + pinfo *parent = procinfo (myself->ppid); + sigproc_printf ("parent = %p", parent); + HANDLE hP = OpenProcess (PROCESS_ALL_ACCESS, FALSE, + parent->dwProcessId); + sigproc_printf ("parent's handle = %d", hP); + if (hP == NULL && GetLastError () == ERROR_INVALID_PARAMETER) + res = 1; + else if (hP) + { + ProtectHandle (hP); + res = DuplicateHandle (hMainProc, pi.hProcess, hP, + &myself->hProcess, 0, FALSE, + DUPLICATE_SAME_ACCESS); + sigproc_printf ("Dup hP %d", res); + ForceCloseHandle (hP); + } + if (!res) + { + system_printf ("Reparent failed, parent handle %p, %E", hP); + system_printf ("my dwProcessId %d, myself->dwProcessId %d", + GetCurrentProcessId(), myself->dwProcessId); + system_printf ("myself->process_state %x", + myself->process_state); + system_printf ("myself->hProcess %x", myself->hProcess); + } + } + res = EXIT_REPARENTING; + ForceCloseHandle1 (hExeced, childhProc); + hExeced = INVALID_HANDLE_VALUE; + } + else if (exited) + { + ForceCloseHandle1 (hExeced, childhProc); + hExeced = INVALID_HANDLE_VALUE; // stop do_exit from attempting to terminate child + } + + MALLOC_CHECK; + do_exit (res | EXIT_NOCLOSEALL); + } + + if (mode == _P_WAIT) + { + waitpid (child->pid, (int *) &res, 0); + } + else if (mode == _P_DETACH) + { + /* Lose all memory of this child. */ + res = 0; + } + else if ((mode == _P_NOWAIT) || (mode == _P_NOWAITO)) + { + res = child->pid; + } + + 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) +{ + pinfo *child; + 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, myself, mode); + /* Errno should be set by spawn_guts. */ + ret = -1; + break; + case _P_NOWAIT: + case _P_NOWAITO: + case _P_WAIT: + case _P_DETACH: + child = cygwin_shared->p.allocate_pid (); + if (!child) + { + set_errno (EAGAIN); + syscall_printf ("-1 = spawnve (), process table full"); + return -1; + } + strcpy (child->progname, path); + child->ppid = myself->pid; + child->uid = myself->uid; + child->gid = myself->gid; + child->pgid = myself->pgid; + child->sid = myself->sid; + child->ctty = myself->ctty; + child->umask = myself->umask; + child->process_state |= PID_INITIALIZING; + memcpy (child->username, myself->username, MAX_USER_NAME); + child->psid = myself->psid; + memcpy (child->sidbuf, myself->sidbuf, 40); + memcpy (child->logsrv, myself->logsrv, 256); + memcpy (child->domain, myself->domain, MAX_COMPUTERNAME_LENGTH+1); + subproc_init (); + ret = spawn_guts (hToken, path, argv, envp, child, mode); + if (ret == -1) + child->process_state = PID_NOT_IN_USE; + + if (vf) + { + vf->pid = child->pid; + 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, + *user_data->envptr); +} + +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, *user_data->envptr); +} + +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, *user_data->envptr); +} + +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, *user_data->envptr); +} + +extern "C" +int +spawnvpe (int mode, const char *file, const char * const *argv, + const char * const *envp) +{ + char buf[MAXNAMLEN]; + return _spawnve (NULL, mode, find_exec (file, buf), argv, envp); +} |