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