lib: Move generic file-handling code to lib/

[petitboot] / discover / file.c

diff --git a/discover/file.c b/discover/file.c
deleted file mode 100644 (file)
index 1bde9fb..0000000
--- a/discover/file.c
+++ /dev/null
@@ -1,123 +0,0 @@
-/*
- *  Copyright (C) 2013 Jeremy Kerr <jk@ozlabs.org>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; version 2 of the License.
- *
- *  This program 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 General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include <talloc/talloc.h>
-
-#include "file.h"
-
-static const int max_file_size = 1024 * 1024;
-
-int read_file(void *ctx, const char *filename, char **bufp, int *lenp)
-{
-       struct stat statbuf;
-       int rc, fd, i, len;
-       char *buf;
-
-       fd = open(filename, O_RDONLY);
-       if (fd < 0)
-               return -1;
-
-       rc = fstat(fd, &statbuf);
-       if (rc < 0)
-               goto err_close;
-
-       len = statbuf.st_size;
-       if (len > max_file_size)
-               goto err_close;
-
-       buf = talloc_array(ctx, char, len + 1);
-       if (!buf)
-               goto err_close;
-
-       for (i = 0; i < len; i += rc) {
-               rc = read(fd, buf + i, len - i);
-
-               /* unexpected EOF: trim and return */
-               if (rc == 0) {
-                       len = i;
-                       break;
-               }
-
-               if (rc < 0)
-                       goto err_free;
-
-       }
-
-       buf[len] = '\0';
-
-       close(fd);
-       *bufp = buf;
-       *lenp = len;
-       return 0;
-
-err_free:
-       talloc_free(buf);
-err_close:
-       close(fd);
-       return -1;
-}
-
-static int write_fd(int fd, char *buf, int len)
-{
-       int i, rc;
-
-       for (i = 0; i < len; i += rc) {
-               rc = write(fd, buf + i, len - i);
-               if (rc < 0 && errno != -EINTR)
-                       return rc;
-       }
-
-       return 0;
-}
-
-int replace_file(const char *filename, char *buf, int len)
-{
-       char *tempfile;
-       mode_t oldmask;
-       int rc, fd;
-
-       tempfile = talloc_asprintf(NULL, "%s.XXXXXX", filename);
-
-       oldmask = umask(0644);
-       fd = mkstemp(tempfile);
-       umask(oldmask);
-       if (fd < 0) {
-               talloc_free(tempfile);
-               return fd;
-       }
-
-       rc = write_fd(fd, buf, len);
-       if (rc) {
-               unlink(tempfile);
-       } else {
-               rc = rename(tempfile, filename);
-       }
-
-       talloc_free(tempfile);
-
-       fchmod(fd, 0644);
-
-       close(fd);
-       return rc;
-}