--- /dev/null
+/* Utilities to execute a program in a subprocess (possibly linked by pipes
+ with other subprocesses), and wait for it. DJGPP specialization.
+ Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005
+ Free Software Foundation, Inc.
+
+This file is part of the libiberty library.
+Libiberty is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+Libiberty is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with libiberty; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+#include "pex-common.h"
+
+#include <stdio.h>
+#include <errno.h>
+#ifdef NEED_DECLARATION_ERRNO
+extern int errno;
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <process.h>
+
+/* Use ECHILD if available, otherwise use EINVAL. */
+#ifdef ECHILD
+#define PWAIT_ERROR ECHILD
+#else
+#define PWAIT_ERROR EINVAL
+#endif
+
+static int pex_djgpp_open_read (struct pex_obj *, const char *, int);
+static int pex_djgpp_open_write (struct pex_obj *, const char *, int);
+static pid_t pex_djgpp_exec_child (struct pex_obj *, int, const char *,
+ char * const *, char * const *,
+ int, int, int, int,
+ const char **, int *);
+static int pex_djgpp_close (struct pex_obj *, int);
+static int pex_djgpp_wait (struct pex_obj *, pid_t, int *, struct pex_time *,
+ int, const char **, int *);
+
+/* The list of functions we pass to the common routines. */
+
+const struct pex_funcs funcs =
+{
+ pex_djgpp_open_read,
+ pex_djgpp_open_write,
+ pex_djgpp_exec_child,
+ pex_djgpp_close,
+ pex_djgpp_wait,
+ NULL, /* pipe */
+ NULL, /* fdopenr */
+ NULL, /* fdopenw */
+ NULL /* cleanup */
+};
+
+/* Return a newly initialized pex_obj structure. */
+
+struct pex_obj *
+pex_init (int flags, const char *pname, const char *tempbase)
+{
+ /* DJGPP does not support pipes. */
+ flags &= ~ PEX_USE_PIPES;
+ return pex_init_common (flags, pname, tempbase, &funcs);
+}
+
+/* Open a file for reading. */
+
+static int
+pex_djgpp_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED,
+ const char *name, int binary)
+{
+ return open (name, O_RDONLY | (binary ? O_BINARY : O_TEXT));
+}
+
+/* Open a file for writing. */
+
+static int
+pex_djgpp_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED,
+ const char *name, int binary)
+{
+ /* Note that we can't use O_EXCL here because gcc may have already
+ created the temporary file via make_temp_file. */
+ return open (name,
+ (O_WRONLY | O_CREAT | O_TRUNC
+ | (binary ? O_BINARY : O_TEXT)),
+ S_IRUSR | S_IWUSR);
+}
+
+/* Close a file. */
+
+static int
+pex_djgpp_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd)
+{
+ return close (fd);
+}
+
+/* Execute a child. */
+
+static pid_t
+pex_djgpp_exec_child (struct pex_obj *obj, int flags, const char *executable,
+ char * const * argv, char * const * env,
+ int in, int out, int errdes,
+ int toclose ATTRIBUTE_UNUSED, const char **errmsg,
+ int *err)
+{
+ int org_in, org_out, org_errdes;
+ int status;
+ int *statuses;
+
+ org_in = -1;
+ org_out = -1;
+ org_errdes = -1;
+
+ if (in != STDIN_FILE_NO)
+ {
+ org_in = dup (STDIN_FILE_NO);
+ if (org_in < 0)
+ {
+ *err = errno;
+ *errmsg = "dup";
+ return (pid_t) -1;
+ }
+ if (dup2 (in, STDIN_FILE_NO) < 0)
+ {
+ *err = errno;
+ *errmsg = "dup2";
+ return (pid_t) -1;
+ }
+ if (close (in) < 0)
+ {
+ *err = errno;
+ *errmsg = "close";
+ return (pid_t) -1;
+ }
+ }
+
+ if (out != STDOUT_FILE_NO)
+ {
+ org_out = dup (STDOUT_FILE_NO);
+ if (org_out < 0)
+ {
+ *err = errno;
+ *errmsg = "dup";
+ return (pid_t) -1;
+ }
+ if (dup2 (out, STDOUT_FILE_NO) < 0)
+ {
+ *err = errno;
+ *errmsg = "dup2";
+ return (pid_t) -1;
+ }
+ if (close (out) < 0)
+ {
+ *err = errno;
+ *errmsg = "close";
+ return (pid_t) -1;
+ }
+ }
+
+ if (errdes != STDERR_FILE_NO
+ || (flags & PEX_STDERR_TO_STDOUT) != 0)
+ {
+ org_errdes = dup (STDERR_FILE_NO);
+ if (org_errdes < 0)
+ {
+ *err = errno;
+ *errmsg = "dup";
+ return (pid_t) -1;
+ }
+ if (dup2 ((flags & PEX_STDERR_TO_STDOUT) != 0 ? STDOUT_FILE_NO : errdes,
+ STDERR_FILE_NO) < 0)
+ {
+ *err = errno;
+ *errmsg = "dup2";
+ return (pid_t) -1;
+ }
+ if (errdes != STDERR_FILE_NO)
+ {
+ if (close (errdes) < 0)
+ {
+ *err = errno;
+ *errmsg = "close";
+ return (pid_t) -1;
+ }
+ }
+ }
+
+ if (env)
+ status = (((flags & PEX_SEARCH) != 0 ? spawnvpe : spawnve)
+ (P_WAIT, executable, argv, env));
+ else
+ status = (((flags & PEX_SEARCH) != 0 ? spawnvp : spawnv)
+ (P_WAIT, executable, argv));
+
+ if (status == -1)
+ {
+ *err = errno;
+ *errmsg = ((flags & PEX_SEARCH) != 0) ? "spawnvp" : "spawnv";
+ }
+
+ if (in != STDIN_FILE_NO)
+ {
+ if (dup2 (org_in, STDIN_FILE_NO) < 0)
+ {
+ *err = errno;
+ *errmsg = "dup2";
+ return (pid_t) -1;
+ }
+ if (close (org_in) < 0)
+ {
+ *err = errno;
+ *errmsg = "close";
+ return (pid_t) -1;
+ }
+ }
+
+ if (out != STDOUT_FILE_NO)
+ {
+ if (dup2 (org_out, STDOUT_FILE_NO) < 0)
+ {
+ *err = errno;
+ *errmsg = "dup2";
+ return (pid_t) -1;
+ }
+ if (close (org_out) < 0)
+ {
+ *err = errno;
+ *errmsg = "close";
+ return (pid_t) -1;
+ }
+ }
+
+ if (errdes != STDERR_FILE_NO
+ || (flags & PEX_STDERR_TO_STDOUT) != 0)
+ {
+ if (dup2 (org_errdes, STDERR_FILE_NO) < 0)
+ {
+ *err = errno;
+ *errmsg = "dup2";
+ return (pid_t) -1;
+ }
+ if (close (org_errdes) < 0)
+ {
+ *err = errno;
+ *errmsg = "close";
+ return (pid_t) -1;
+ }
+ }
+
+ /* Save the exit status for later. When we are called, obj->count
+ is the number of children which have executed before this
+ one. */
+ statuses = (int *) obj->sysdep;
+ statuses = XRESIZEVEC (int, statuses, obj->count + 1);
+ statuses[obj->count] = status;
+ obj->sysdep = (void *) statuses;
+
+ return (pid_t) obj->count;
+}
+
+/* Wait for a child process to complete. Actually the child process
+ has already completed, and we just need to return the exit
+ status. */
+
+static int
+pex_djgpp_wait (struct pex_obj *obj, pid_t pid, int *status,
+ struct pex_time *time, int done ATTRIBUTE_UNUSED,
+ const char **errmsg ATTRIBUTE_UNUSED,
+ int *err ATTRIBUTE_UNUSED)
+{
+ int *statuses;
+
+ if (time != NULL)
+ memset (time, 0, sizeof *time);
+
+ statuses = (int *) obj->sysdep;
+ *status = statuses[pid];
+
+ return 0;
+}
projects / msp430-gcc.git / blobdiff