--- /dev/null
+/* Common code for executing a program in a sub-process.
+ Copyright (C) 2005 Free Software Foundation, Inc.
+ Written by Ian Lance Taylor <ian@airs.com>.
+
+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 "config.h"
+#include "libiberty.h"
+#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
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+extern int mkstemps (char *, int);
+
+/* This file contains subroutines for the program execution routines
+ (pex_init, pex_run, etc.). This file is compiled on all
+ systems. */
+
+static void pex_add_remove (struct pex_obj *, const char *, int);
+static int pex_get_status_and_time (struct pex_obj *, int, const char **,
+ int *);
+
+/* Initialize a pex_obj structure. */
+
+struct pex_obj *
+pex_init_common (int flags, const char *pname, const char *tempbase,
+ const struct pex_funcs *funcs)
+{
+ struct pex_obj *obj;
+
+ obj = XNEW (struct pex_obj);
+ obj->flags = flags;
+ obj->pname = pname;
+ obj->tempbase = tempbase;
+ obj->next_input = STDIN_FILE_NO;
+ obj->next_input_name = NULL;
+ obj->next_input_name_allocated = 0;
+ obj->stderr_pipe = -1;
+ obj->count = 0;
+ obj->children = NULL;
+ obj->status = NULL;
+ obj->time = NULL;
+ obj->number_waited = 0;
+ obj->input_file = NULL;
+ obj->read_output = NULL;
+ obj->read_err = NULL;
+ obj->remove_count = 0;
+ obj->remove = NULL;
+ obj->funcs = funcs;
+ obj->sysdep = NULL;
+ return obj;
+}
+
+/* Add a file to be removed when we are done. */
+
+static void
+pex_add_remove (struct pex_obj *obj, const char *name, int allocated)
+{
+ char *add;
+
+ ++obj->remove_count;
+ obj->remove = XRESIZEVEC (char *, obj->remove, obj->remove_count);
+ if (allocated)
+ add = (char *) name;
+ else
+ add = xstrdup (name);
+ obj->remove[obj->remove_count - 1] = add;
+}
+
+/* Generate a temporary file name based on OBJ, FLAGS, and NAME.
+ Return NULL if we were unable to reserve a temporary filename.
+
+ If non-NULL, the result is either allocated with malloc, or the
+ same pointer as NAME. */
+static char *
+temp_file (struct pex_obj *obj, int flags, char *name)
+{
+ if (name == NULL)
+ {
+ if (obj->tempbase == NULL)
+ {
+ name = make_temp_file (NULL);
+ }
+ else
+ {
+ int len = strlen (obj->tempbase);
+ int out;
+
+ if (len >= 6
+ && strcmp (obj->tempbase + len - 6, "XXXXXX") == 0)
+ name = xstrdup (obj->tempbase);
+ else
+ name = concat (obj->tempbase, "XXXXXX", NULL);
+
+ out = mkstemps (name, 0);
+ if (out < 0)
+ {
+ free (name);
+ return NULL;
+ }
+
+ /* This isn't obj->funcs->close because we got the
+ descriptor from mkstemps, not from a function in
+ obj->funcs. Calling close here is just like what
+ make_temp_file does. */
+ close (out);
+ }
+ }
+ else if ((flags & PEX_SUFFIX) != 0)
+ {
+ if (obj->tempbase == NULL)
+ name = make_temp_file (name);
+ else
+ name = concat (obj->tempbase, name, NULL);
+ }
+
+ return name;
+}
+
+
+/* As for pex_run (), but permits the environment for the child process
+ to be specified. */
+
+const char *
+pex_run_in_environment (struct pex_obj *obj, int flags, const char *executable,
+ char * const * argv, char * const * env,
+ const char *orig_outname, const char *errname,
+ int *err)
+{
+ const char *errmsg;
+ int in, out, errdes;
+ char *outname;
+ int outname_allocated;
+ int p[2];
+ int toclose;
+ long pid;
+
+ in = -1;
+ out = -1;
+ errdes = -1;
+ outname = (char *) orig_outname;
+ outname_allocated = 0;
+
+ /* If the user called pex_input_file, close the file now. */
+ if (obj->input_file)
+ {
+ if (fclose (obj->input_file) == EOF)
+ {
+ errmsg = "closing pipeline input file";
+ goto error_exit;
+ }
+ obj->input_file = NULL;
+ }
+
+ /* Set IN. */
+
+ if (obj->next_input_name != NULL)
+ {
+ /* We have to make sure that the previous process has completed
+ before we try to read the file. */
+ if (!pex_get_status_and_time (obj, 0, &errmsg, err))
+ goto error_exit;
+
+ in = obj->funcs->open_read (obj, obj->next_input_name,
+ (flags & PEX_BINARY_INPUT) != 0);
+ if (in < 0)
+ {
+ *err = errno;
+ errmsg = "open temporary file";
+ goto error_exit;
+ }
+ if (obj->next_input_name_allocated)
+ {
+ free (obj->next_input_name);
+ obj->next_input_name_allocated = 0;
+ }
+ obj->next_input_name = NULL;
+ }
+ else
+ {
+ in = obj->next_input;
+ if (in < 0)
+ {
+ *err = 0;
+ errmsg = "pipeline already complete";
+ goto error_exit;
+ }
+ }
+
+ /* Set OUT and OBJ->NEXT_INPUT/OBJ->NEXT_INPUT_NAME. */
+
+ if ((flags & PEX_LAST) != 0)
+ {
+ if (outname == NULL)
+ out = STDOUT_FILE_NO;
+ else if ((flags & PEX_SUFFIX) != 0)
+ {
+ outname = concat (obj->tempbase, outname, NULL);
+ outname_allocated = 1;
+ }
+ obj->next_input = -1;
+ }
+ else if ((obj->flags & PEX_USE_PIPES) == 0)
+ {
+ outname = temp_file (obj, flags, outname);
+ if (! outname)
+ {
+ *err = 0;
+ errmsg = "could not create temporary file";
+ goto error_exit;
+ }
+
+ if (outname != orig_outname)
+ outname_allocated = 1;
+
+ if ((obj->flags & PEX_SAVE_TEMPS) == 0)
+ {
+ pex_add_remove (obj, outname, outname_allocated);
+ outname_allocated = 0;
+ }
+
+ /* Hand off ownership of outname to the next stage. */
+ obj->next_input_name = outname;
+ obj->next_input_name_allocated = outname_allocated;
+ outname_allocated = 0;
+ }
+ else
+ {
+ if (obj->funcs->pipe (obj, p, (flags & PEX_BINARY_OUTPUT) != 0) < 0)
+ {
+ *err = errno;
+ errmsg = "pipe";
+ goto error_exit;
+ }
+
+ out = p[WRITE_PORT];
+ obj->next_input = p[READ_PORT];
+ }
+
+ if (out < 0)
+ {
+ out = obj->funcs->open_write (obj, outname,
+ (flags & PEX_BINARY_OUTPUT) != 0);
+ if (out < 0)
+ {
+ *err = errno;
+ errmsg = "open temporary output file";
+ goto error_exit;
+ }
+ }
+
+ if (outname_allocated)
+ {
+ free (outname);
+ outname_allocated = 0;
+ }
+
+ /* Set ERRDES. */
+
+ if (errname != NULL && (flags & PEX_STDERR_TO_PIPE) != 0)
+ {
+ *err = 0;
+ errmsg = "both ERRNAME and PEX_STDERR_TO_PIPE specified.";
+ goto error_exit;
+ }
+
+ if (obj->stderr_pipe != -1)
+ {
+ *err = 0;
+ errmsg = "PEX_STDERR_TO_PIPE used in the middle of pipeline";
+ goto error_exit;
+ }
+
+ if (errname == NULL)
+ {
+ if (flags & PEX_STDERR_TO_PIPE)
+ {
+ if (obj->funcs->pipe (obj, p, (flags & PEX_BINARY_ERROR) != 0) < 0)
+ {
+ *err = errno;
+ errmsg = "pipe";
+ goto error_exit;
+ }
+
+ errdes = p[WRITE_PORT];
+ obj->stderr_pipe = p[READ_PORT];
+ }
+ else
+ {
+ errdes = STDERR_FILE_NO;
+ }
+ }
+ else
+ {
+ errdes = obj->funcs->open_write (obj, errname,
+ (flags & PEX_BINARY_ERROR) != 0);
+ if (errdes < 0)
+ {
+ *err = errno;
+ errmsg = "open error file";
+ goto error_exit;
+ }
+ }
+
+ /* If we are using pipes, the child process has to close the next
+ input pipe. */
+
+ if ((obj->flags & PEX_USE_PIPES) == 0)
+ toclose = -1;
+ else
+ toclose = obj->next_input;
+
+ /* Run the program. */
+
+ pid = obj->funcs->exec_child (obj, flags, executable, argv, env,
+ in, out, errdes, toclose, &errmsg, err);
+ if (pid < 0)
+ goto error_exit;
+
+ ++obj->count;
+ obj->children = XRESIZEVEC (long, obj->children, obj->count);
+ obj->children[obj->count - 1] = pid;
+
+ return NULL;
+
+ error_exit:
+ if (in >= 0 && in != STDIN_FILE_NO)
+ obj->funcs->close (obj, in);
+ if (out >= 0 && out != STDOUT_FILE_NO)
+ obj->funcs->close (obj, out);
+ if (errdes >= 0 && errdes != STDERR_FILE_NO)
+ obj->funcs->close (obj, errdes);
+ if (outname_allocated)
+ free (outname);
+ return errmsg;
+}
+
+/* Run a program. */
+
+const char *
+pex_run (struct pex_obj *obj, int flags, const char *executable,
+ char * const * argv, const char *orig_outname, const char *errname,
+ int *err)
+{
+ return pex_run_in_environment (obj, flags, executable, argv, NULL,
+ orig_outname, errname, err);
+}
+
+/* Return a FILE pointer for a temporary file to fill with input for
+ the pipeline. */
+FILE *
+pex_input_file (struct pex_obj *obj, int flags, const char *in_name)
+{
+ char *name = (char *) in_name;
+ FILE *f;
+
+ /* This must be called before the first pipeline stage is run, and
+ there must not have been any other input selected. */
+ if (obj->count != 0
+ || (obj->next_input >= 0 && obj->next_input != STDIN_FILE_NO)
+ || obj->next_input_name)
+ {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ name = temp_file (obj, flags, name);
+ if (! name)
+ return NULL;
+
+ f = fopen (name, (flags & PEX_BINARY_OUTPUT) ? "wb" : "w");
+ if (! f)
+ {
+ free (name);
+ return NULL;
+ }
+
+ obj->input_file = f;
+ obj->next_input_name = name;
+ obj->next_input_name_allocated = (name != in_name);
+
+ return f;
+}
+
+/* Return a stream for a pipe connected to the standard input of the
+ first stage of the pipeline. */
+FILE *
+pex_input_pipe (struct pex_obj *obj, int binary)
+{
+ int p[2];
+ FILE *f;
+
+ /* You must call pex_input_pipe before the first pex_run or pex_one. */
+ if (obj->count > 0)
+ goto usage_error;
+
+ /* You must be using pipes. Implementations that don't support
+ pipes clear this flag before calling pex_init_common. */
+ if (! (obj->flags & PEX_USE_PIPES))
+ goto usage_error;
+
+ /* If we have somehow already selected other input, that's a
+ mistake. */
+ if ((obj->next_input >= 0 && obj->next_input != STDIN_FILE_NO)
+ || obj->next_input_name)
+ goto usage_error;
+
+ if (obj->funcs->pipe (obj, p, binary != 0) < 0)
+ return NULL;
+
+ f = obj->funcs->fdopenw (obj, p[WRITE_PORT], binary != 0);
+ if (! f)
+ {
+ int saved_errno = errno;
+ obj->funcs->close (obj, p[READ_PORT]);
+ obj->funcs->close (obj, p[WRITE_PORT]);
+ errno = saved_errno;
+ return NULL;
+ }
+
+ obj->next_input = p[READ_PORT];
+
+ return f;
+
+ usage_error:
+ errno = EINVAL;
+ return NULL;
+}
+
+/* Return a FILE pointer for the output of the last program
+ executed. */
+
+FILE *
+pex_read_output (struct pex_obj *obj, int binary)
+{
+ if (obj->next_input_name != NULL)
+ {
+ const char *errmsg;
+ int err;
+
+ /* We have to make sure that the process has completed before we
+ try to read the file. */
+ if (!pex_get_status_and_time (obj, 0, &errmsg, &err))
+ {
+ errno = err;
+ return NULL;
+ }
+
+ obj->read_output = fopen (obj->next_input_name, binary ? "rb" : "r");
+
+ if (obj->next_input_name_allocated)
+ {
+ free (obj->next_input_name);
+ obj->next_input_name_allocated = 0;
+ }
+ obj->next_input_name = NULL;
+ }
+ else
+ {
+ int o;
+
+ o = obj->next_input;
+ if (o < 0 || o == STDIN_FILE_NO)
+ return NULL;
+ obj->read_output = obj->funcs->fdopenr (obj, o, binary);
+ obj->next_input = -1;
+ }
+
+ return obj->read_output;
+}
+
+FILE *
+pex_read_err (struct pex_obj *obj, int binary)
+{
+ int o;
+
+ o = obj->stderr_pipe;
+ if (o < 0 || o == STDIN_FILE_NO)
+ return NULL;
+ obj->read_err = obj->funcs->fdopenr (obj, o, binary);
+ return obj->read_err;
+}
+
+/* Get the exit status and, if requested, the resource time for all
+ the child processes. Return 0 on failure, 1 on success. */
+
+static int
+pex_get_status_and_time (struct pex_obj *obj, int done, const char **errmsg,
+ int *err)
+{
+ int ret;
+ int i;
+
+ if (obj->number_waited == obj->count)
+ return 1;
+
+ obj->status = XRESIZEVEC (int, obj->status, obj->count);
+ if ((obj->flags & PEX_RECORD_TIMES) != 0)
+ obj->time = XRESIZEVEC (struct pex_time, obj->time, obj->count);
+
+ ret = 1;
+ for (i = obj->number_waited; i < obj->count; ++i)
+ {
+ if (obj->funcs->wait (obj, obj->children[i], &obj->status[i],
+ obj->time == NULL ? NULL : &obj->time[i],
+ done, errmsg, err) < 0)
+ ret = 0;
+ }
+ obj->number_waited = i;
+
+ return ret;
+}
+
+/* Get exit status of executed programs. */
+
+int
+pex_get_status (struct pex_obj *obj, int count, int *vector)
+{
+ if (obj->status == NULL)
+ {
+ const char *errmsg;
+ int err;
+
+ if (!pex_get_status_and_time (obj, 0, &errmsg, &err))
+ return 0;
+ }
+
+ if (count > obj->count)
+ {
+ memset (vector + obj->count, 0, (count - obj->count) * sizeof (int));
+ count = obj->count;
+ }
+
+ memcpy (vector, obj->status, count * sizeof (int));
+
+ return 1;
+}
+
+/* Get process times of executed programs. */
+
+int
+pex_get_times (struct pex_obj *obj, int count, struct pex_time *vector)
+{
+ if (obj->status == NULL)
+ {
+ const char *errmsg;
+ int err;
+
+ if (!pex_get_status_and_time (obj, 0, &errmsg, &err))
+ return 0;
+ }
+
+ if (obj->time == NULL)
+ return 0;
+
+ if (count > obj->count)
+ {
+ memset (vector + obj->count, 0,
+ (count - obj->count) * sizeof (struct pex_time));
+ count = obj->count;
+ }
+
+ memcpy (vector, obj->time, count * sizeof (struct pex_time));
+
+ return 1;
+}
+
+/* Free a pex_obj structure. */
+
+void
+pex_free (struct pex_obj *obj)
+{
+ if (obj->next_input >= 0 && obj->next_input != STDIN_FILE_NO)
+ obj->funcs->close (obj, obj->next_input);
+
+ /* If the caller forgot to wait for the children, we do it here, to
+ avoid zombies. */
+ if (obj->status == NULL)
+ {
+ const char *errmsg;
+ int err;
+
+ obj->flags &= ~ PEX_RECORD_TIMES;
+ pex_get_status_and_time (obj, 1, &errmsg, &err);
+ }
+
+ if (obj->next_input_name_allocated)
+ free (obj->next_input_name);
+ if (obj->children != NULL)
+ free (obj->children);
+ if (obj->status != NULL)
+ free (obj->status);
+ if (obj->time != NULL)
+ free (obj->time);
+ if (obj->read_output != NULL)
+ fclose (obj->read_output);
+ if (obj->read_err != NULL)
+ fclose (obj->read_err);
+
+ if (obj->remove_count > 0)
+ {
+ int i;
+
+ for (i = 0; i < obj->remove_count; ++i)
+ {
+ remove (obj->remove[i]);
+ free (obj->remove[i]);
+ }
+ free (obj->remove);
+ }
+
+ if (obj->funcs->cleanup != NULL)
+ obj->funcs->cleanup (obj);
+
+ free (obj);
+}
projects / msp430-gcc.git / blobdiff