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  
      36  extern int procfs_process_get_stat_nth(struct path_cxt *pc, int n, uintmax_t *re);
      37  
      38  static inline ssize_t procfs_process_get_exe(struct path_cxt *pc, char *buf, size_t bufsz)
      39  {
      40  	return ul_path_readlink(pc, buf, bufsz, "exe");
      41  }
      42  
      43  static inline ssize_t procfs_process_get_root(struct path_cxt *pc, char *buf, size_t bufsz)
      44  {
      45  	return ul_path_readlink(pc, buf, bufsz, "root");
      46  }
      47  
      48  static inline ssize_t procfs_process_get_cwd(struct path_cxt *pc, char *buf, size_t bufsz)
      49  {
      50  	return ul_path_readlink(pc, buf, bufsz, "cwd");
      51  }
      52  
      53  extern int procfs_process_next_tid(struct path_cxt *pc, DIR **sub, pid_t *tid);
      54  extern int procfs_process_next_fd(struct path_cxt *pc, DIR **sub, int *fd);
      55  
      56  extern int procfs_dirent_is_process(struct dirent *d);
      57  extern int procfs_dirent_get_pid(struct dirent *d, pid_t *pid);
      58  extern int procfs_dirent_get_uid(DIR *procfs, struct dirent *d, uid_t *uid);
      59  extern int procfs_dirent_match_uid(DIR *procfs, struct dirent *d, uid_t uid);
      60  extern int procfs_dirent_get_name(DIR *procfs, struct dirent *d, char *buf, size_t bufsz);
      61  extern int procfs_dirent_match_name(DIR *procfs, struct dirent *d, const char *name);
      62  
      63  extern int fd_is_procfs(int fd);
      64  extern char *pid_get_cmdname(pid_t pid);
      65  extern char *pid_get_cmdline(pid_t pid);
      66  
      67  #endif /* UTIL_LINUX_PROCFS_H */