gcc/libiberty/pex-djgpp.c

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/* Utilities to execute a program in a subprocess (possibly linked by pipes
with other subprocesses), and wait for it. DJGPP specialization.
2022-01-03 10:42:10 +01:00
Copyright (C) 1996-2022 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, 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 pid_t 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, int append)
{
/* Note that we can't use O_EXCL here because gcc may have already
created the temporary file via make_temp_file. */
if (append)
return -1;
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;
libiberty.h (ACONCAT): Properly cast value of alloca(). include/ 2005-05-24 Gabriel Dos Reis <gdr@integrable-solutions.net> * libiberty.h (ACONCAT): Properly cast value of alloca(). * ansidecl.h (ATTRIBUTE_UNUSED_LABEL): Don't define if __cplusplus. libiberty/ 2005-05-24 Gabriel Dos Reis <gdr@integrable-solutions.net> * configure.ac: Check declarations for calloc(), getenv(), malloc(), realloc() and sbrk(). * config.in: Regenerate. * configure: Likewise. * alloca.c (C_alloca): Change "new" to "new_storage". Use XNEWVEC instead of xmalloc. * choose-temp.c (choose_temp_base): Use XNEWVEC instea od xmalloc. * concat.c (liiberty_concat_ptr): Surround definition with an extern "C" block, if __cplusplus. (concat): Use XNEWVEC instead of xmalloc. (reconcat): Likewise. * cp-demangle.c (struct d_print_template): Rename member "template" to "template_decl". Adjust use throughout the file. (d_print_resize): Properly cast return value of realloc(). (cplus_demangle_print): Same for malloc(). (d_demangle): Likewise. * cp-demint.c (cplus_demangle_fill_builtin_type): Rename parameter "typename" to "type_name". * cplus-dem.c (grow_vect): Use XRESIZEVEC instead of xrealloc(). (work_stuff_copy_to_from): Use XNEWVEC insteand of xmalloc(). (demangle_template_value_parm): Likewise. (demangle_template): Likewise. (recursively_demangle): Likewise. (do_hpacc_template_literal): Likewise. (do_arg): Likewise. (remember_type): Likewise. (remember_Ktype): Likewise. (register_Btype): Likewise. (string_need): Use XRESIZEVEC instead of xrealloc(). * dyn-string.c (dyn_string_init): Use XNEWVEC. (dyn_string_new): Use XNEW. (dyn_string_resize): Use XRESIZEVEC. * fnmatch.c (fnmatch): Rename local variable "not" to "negate". * getopt.c (getenv): Declare only if !__cplusplus and !getenv. Otherwise include <stdlib.h>. (exchange): Cast return value of malloc(). * hashtab.c (htab_size): Define as both macro and non-inline function. (htab_elements): Likewise. * getpwd.c (getpwd): Use XNEWVEC. (htab_create_alloc_ex): Use C90 prototype-style. * lrealpath.c (lrealpath): Appropriately cast return value of malloc(). * make-relative-prefix.c (save_string): Likewise. * make-temp-file.c (try_dir): Rename from "try". Adjust use in the file. (choose_tmpdir): Use XNEWVEC. * mkstemps.c (mkstemps): Rename parameter "template" to "pattern". * pex-common.c (pex_init_common): Use XNEW. (pex_add_remove): Use XRESIZEVEC. (pex_run): Likewise. (pex_get_status_and_time): Likewise. * pex-djgpp.c (pex_djgpp_exec_child): Likewise. * pex-msdos.c (pex_init): Use XNEW. (pex_msdos_exec_child): Likewise. (pex_msdos_exec_child): Use XRESIZEVEC. * pex-unix.c (pex_wait): Use XNEW. * pex-win32.c (fix_argv): Use XNEWVEC. * pexecute.c (pwait): Likewise. * setenv.c (setenv): Properly cast return value of malloc(). * sigsetmask.c (sigsetmask): Rename local variables "old" and "new" to "old_sig" and "new_sig". * sort.c (main): Use XNEWVEC. * spaces.c (spaces): Cast return value of malloc(). * strndup.c (strndup): Likewise. * ternary.c (ternary_insert): Use XNEW. * xmalloc.c (malloc, realloc, calloc, sbrk): Surround declaration with an extern "C" block if __cplusplus. * xstrdup.c (xstrdup): Cast return value of memcpy(). * xstrerror.c (strerror): Enclose declaration in an extern "C" block if __cplusplus. * xstrndup.c (xstrndup): Use XNEW. Cast return value of memcpy(). From-SVN: r100115
2005-05-24 22:48:25 +02:00
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 pid_t
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;
}