root/tools/usb/usbip/libsrc/sysfs_utils.c

DEFINITIONS

1. write_sysfs_attribute

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <sys/types.h>
   3 #include <sys/stat.h>
   4 #include <fcntl.h>
   5 #include <errno.h>
   6 
   7 #include "sysfs_utils.h"
   8 #include "usbip_common.h"
   9 
  10 int write_sysfs_attribute(const char *attr_path, const char *new_value,
  11                           size_t len)
  12 {
  13         int fd;
  14         int length;
  15 
  16         fd = open(attr_path, O_WRONLY);
  17         if (fd < 0) {
  18                 dbg("error opening attribute %s", attr_path);
  19                 return -1;
  20         }
  21 
  22         length = write(fd, new_value, len);
  23         if (length < 0) {
  24                 dbg("error writing to attribute %s", attr_path);
  25                 close(fd);
  26                 return -1;
  27         }
  28 
  29         close(fd);
  30 
  31         return 0;
  32 }