summaryrefslogtreecommitdiff
path: root/udev_lib.c
diff options
context:
space:
mode:
Diffstat (limited to 'udev_lib.c')
-rw-r--r--udev_lib.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/udev_lib.c b/udev_lib.c
new file mode 100644
index 0000000000..50598a4a31
--- /dev/null
+++ b/udev_lib.c
@@ -0,0 +1,111 @@
+/*
+ * udev_lib - generic stuff used by udev
+ *
+ * Copyright (C) 2004 Kay Sievers <kay@vrfy.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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include "libsysfs/sysfs/libsysfs.h"
+#include "udev.h"
+#include "udev_lib.h"
+
+
+char *get_action(void)
+{
+ char *action;
+
+ action = getenv("ACTION");
+ if (action != NULL && strlen(action) > ACTION_SIZE)
+ action[ACTION_SIZE-1] = '\0';
+
+ return action;
+}
+
+char *get_devpath(void)
+{
+ char *devpath;
+
+ devpath = getenv("DEVPATH");
+ if (devpath != NULL && strlen(devpath) > DEVPATH_SIZE)
+ devpath[DEVPATH_SIZE-1] = '\0';
+
+ return devpath;
+}
+
+char *get_seqnum(void)
+{
+ char *seqnum;
+
+ seqnum = getenv("SEQNUM");
+
+ return seqnum;
+}
+
+char *get_subsystem(char *subsystem)
+{
+ if (subsystem != NULL && strlen(subsystem) > SUBSYSTEM_SIZE)
+ subsystem[SUBSYSTEM_SIZE-1] = '\0';
+
+ return subsystem;
+}
+
+int file_map(const char *filename, char **buf, size_t *bufsize)
+{
+ struct stat stats;
+ int fd;
+
+ fd = open(filename, O_RDONLY);
+ if (fd < 0) {
+ return -1;
+ }
+
+ if (fstat(fd, &stats) < 0) {
+ return -1;
+ }
+
+ *buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0);
+ if (*buf == MAP_FAILED) {
+ return -1;
+ }
+ *bufsize = stats.st_size;
+
+ close(fd);
+
+ return 0;
+}
+
+void file_unmap(char *buf, size_t bufsize)
+{
+ munmap(buf, bufsize);
+}
+
+size_t buf_get_line(char *buf, size_t buflen, size_t cur)
+{
+ size_t count = 0;
+
+ for (count = cur; count < buflen && buf[count] != '\n'; count++);
+
+ return count - cur;
+}
+