879e4d2590
Many places in dtc use strdup(), but none of them actually check the return value to see if the implied allocation succeeded. This is a potential bug, which we fix in the patch below by replacing strdup() with an xstrdup() which in analogy to xmalloc() will quit with a fatal error if the allocation fails. I felt the introduciton of util.[ch] was a better choice for utility oriented code than directly using srcpos.c for the new string function. This patch is a re-factoring of Dave Gibson's similar patch. Signed-off-by: Jon Loeliger <jdl@freescale.com>
116 lines
2.6 KiB
C
116 lines
2.6 KiB
C
/*
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* Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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#include "dtc.h"
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#include "srcpos.h"
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/*
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* Like yylineno, this is the current open file pos.
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*/
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struct dtc_file *srcpos_file;
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static int dtc_open_one(struct dtc_file *file,
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const char *search,
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const char *fname)
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{
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char *fullname;
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if (search) {
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fullname = xmalloc(strlen(search) + strlen(fname) + 2);
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strcpy(fullname, search);
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strcat(fullname, "/");
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strcat(fullname, fname);
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} else {
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fullname = xstrdup(fname);
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}
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file->file = fopen(fullname, "r");
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if (!file->file) {
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free(fullname);
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return 0;
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}
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file->name = fullname;
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return 1;
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}
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struct dtc_file *dtc_open_file(const char *fname,
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const struct search_path *search)
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{
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static const struct search_path default_search = { NULL, NULL, NULL };
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struct dtc_file *file;
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const char *slash;
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file = xmalloc(sizeof(struct dtc_file));
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slash = strrchr(fname, '/');
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if (slash) {
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char *dir = xmalloc(slash - fname + 1);
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memcpy(dir, fname, slash - fname);
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dir[slash - fname] = 0;
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file->dir = dir;
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} else {
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file->dir = NULL;
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}
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if (streq(fname, "-")) {
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file->name = "stdin";
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file->file = stdin;
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return file;
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}
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if (fname[0] == '/') {
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file->file = fopen(fname, "r");
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if (!file->file)
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goto fail;
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file->name = xstrdup(fname);
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return file;
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}
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if (!search)
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search = &default_search;
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while (search) {
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if (dtc_open_one(file, search->dir, fname))
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return file;
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if (errno != ENOENT)
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goto fail;
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search = search->next;
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}
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fail:
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die("Couldn't open \"%s\": %s\n", fname, strerror(errno));
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}
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void dtc_close_file(struct dtc_file *file)
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{
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if (fclose(file->file))
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die("Error closing \"%s\": %s\n", file->name, strerror(errno));
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free(file->dir);
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free(file);
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}
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