include/procfs.h

   1 /*
   2  * No copyright is claimed.  This code is in the public domain; do with
   3  * it what you wish.
   4  *
   5  * Copyright (C) 2021 Karel Zak <kzak@redhat.com>
   6  */
   7 #ifndef UTIL_LINUX_PROCFS_H
   8 #define UTIL_LINUX_PROCFS_H
   9
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <stdint.h>
  15 #include <sys/types.h>
  16 #include <sys/stat.h>
  17 #include <string.h>
  18 #include <inttypes.h>
  19 #include <dirent.h>
  20
  21 #include "path.h"
  22
  23 struct procfs_process {
  24         pid_t pid;
  25 };
  26
  27 extern void ul_procfs_init_debug(void);
  28 extern struct path_cxt *ul_new_procfs_path(pid_t pid, const char *prefix);
  29 extern int procfs_process_init_path(struct path_cxt *pc, pid_t pid);
  30
  31 extern int procfs_process_get_uid(struct path_cxt *pc, uid_t *uid);
  32 extern ssize_t procfs_process_get_cmdline(struct path_cxt *pc, char *buf, size_t bufsz);
  33 extern ssize_t procfs_process_get_cmdname(struct path_cxt *pc, char *buf, size_t bufsz);
  34 extern ssize_t procfs_process_get_stat(struct path_cxt *pc, char *buf, size_t bufsz);
  35 extern ssize_t procfs_process_get_syscall(struct path_cxt *pc, char *buf, size_t bufsz);
  36
  37 extern int procfs_process_get_stat_nth(struct path_cxt *pc, int n, uintmax_t *re);
  38
  39 static inline ssize_t procfs_process_get_exe(struct path_cxt *pc, char *buf, size_t bufsz)
  40 {
  41         return ul_path_readlink(pc, buf, bufsz, "exe");
  42 }
  43
  44 static inline ssize_t procfs_process_get_root(struct path_cxt *pc, char *buf, size_t bufsz)
  45 {
  46         return ul_path_readlink(pc, buf, bufsz, "root");
  47 }
  48
  49 static inline ssize_t procfs_process_get_cwd(struct path_cxt *pc, char *buf, size_t bufsz)
  50 {
  51         return ul_path_readlink(pc, buf, bufsz, "cwd");
  52 }
  53
  54 extern int procfs_process_next_tid(struct path_cxt *pc, DIR **sub, pid_t *tid);
  55 extern int procfs_process_next_fd(struct path_cxt *pc, DIR **sub, int *fd);
  56
  57 extern int procfs_dirent_is_process(struct dirent *d);
  58 extern int procfs_dirent_get_pid(struct dirent *d, pid_t *pid);
  59 extern int procfs_dirent_get_uid(DIR *procfs, struct dirent *d, uid_t *uid);
  60 extern int procfs_dirent_match_uid(DIR *procfs, struct dirent *d, uid_t uid);
  61 extern int procfs_dirent_get_name(DIR *procfs, struct dirent *d, char *buf, size_t bufsz);
  62 extern int procfs_dirent_match_name(DIR *procfs, struct dirent *d, const char *name);
  63
  64 extern int fd_is_procfs(int fd);
  65 extern char *pid_get_cmdname(pid_t pid);
  66 extern char *pid_get_cmdline(pid_t pid);
  67
  68 #endif /* UTIL_LINUX_PROCFS_H */