misc/lnstat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LNSTAT_H
   3 #define _LNSTAT_H
   4
   5 #include <limits.h>
   6 #include <sys/select.h>
   7
   8 #define LNSTAT_VERSION "0.02 041002"
   9
  10 #define PROC_NET_STAT   "/proc/net/stat"
  11
  12 #define LNSTAT_MAX_FILES                        32
  13 #define LNSTAT_MAX_FIELDS_PER_LINE              32
  14 #define LNSTAT_MAX_FIELD_NAME_LEN               32
  15
  16 struct lnstat_file;
  17
  18 struct lnstat_field {
  19         struct lnstat_file *file;
  20         unsigned int num;                       /* field number in line */
  21         char name[LNSTAT_MAX_FIELD_NAME_LEN+1];
  22         unsigned long values[2];                /* two buffers for values */
  23         unsigned long result;
  24 };
  25
  26 struct lnstat_file {
  27         struct lnstat_file *next;
  28         char path[PATH_MAX+1];
  29         char basename[NAME_MAX+1];
  30         struct timeval last_read;               /* last time of read */
  31         struct timeval interval;                /* interval */
  32         int compat;                             /* 1 == backwards compat mode */
  33         FILE *fp;
  34         unsigned int num_fields;                /* number of fields */
  35         struct lnstat_field fields[LNSTAT_MAX_FIELDS_PER_LINE];
  36 };
  37
  38
  39 struct lnstat_file *lnstat_scan_dir(const char *path, const int num_req_files,
  40                                     const char **req_files);
  41 int lnstat_update(struct lnstat_file *lnstat_files);
  42 int lnstat_dump(FILE *outfd, struct lnstat_file *lnstat_files);
  43 struct lnstat_field *lnstat_find_field(struct lnstat_file *lnstat_files,
  44                                        const char *name);
  45 #endif /* _LNSTAT_H */