fs.h

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#ifndef __fs_h__
#define __fs_h__

#include <iostream>
#include <string>
#include <vector>

#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <pwd.h>
#include <grp.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif

/*
 * *** NASTY KLUDGE ***
 *
 * _FILE_OFFSET_BITS == 64 is needed for a 64-bit off_t, but on sun-solaris2.8
 * it interferes with struct statvfs64, which needs _LARGE_FILES instead.
 * Surely there is a proper way to do this...
 *
 */
#ifdef HAVE_SYS_STATVFS_H
#       ifdef sun
#               ifdef _FILE_OFFSET_BITS
#                       if _FILE_OFFSET_BITS == 64
#                               define __HOLD_FILE_OFFSET_BITS_64
#                               undef _FILE_OFFSET_BITS
#                       endif
#               endif
#       endif
#include <sys/statvfs.h>
#       ifdef __HOLD_FILE_OFFSET_BITS_64
#               define _FILE_OFFSET_BITS 64
#               undef __HOLD_FILE_OFFSET_BITS_64
#       endif
#endif

#ifdef HAVE_SYS_VFS_H
#include <sys/vfs.h>
#endif

#include "types.h"

#ifdef HAVE_SYS_STATVFS_H
#define STATFS statvfs
#else
#define STATFS statfs
#endif

const std::string cwd(void);
const pid_t pid(void);
const pid_t parent_pid(void);

bool absolute_path(const std::string& a_path);
bool relative_path(const std::string& a_path);
std::string reform_path(const std::string& a_path);
std::string permute_path(const std::string& a_path);
std::string path_basename(const std::string& a_path);
std::string path_dirname(const std::string& a_path);
std::string mk_absolute_path(
        const std::string a_path, 
        const std::string a_rel_path
        );
std::string mk_relative_path(
        const std::string a_path_to,
        const std::string a_path_from
        );
bool exists(const std::string& a_path);
bool readable(const std::string& a_path);
bool writable(const std::string& a_path);
bool executable(const std::string& a_path);
#ifdef S_ISFIFO
bool is_fifo_special(const std::string& a_path);
#endif
#ifdef S_ISCHR
bool is_char_special(const std::string& a_path);
#endif
#ifdef S_ISDIR
bool is_dir(const std::string& a_path);
#endif
#ifdef S_ISREG
bool is_file(const std::string& a_path);
#endif
#ifdef S_ISBLK
bool is_block_special(const std::string& a_path);
#endif
#ifdef S_ISLNK
bool is_link(const std::string& a_path);
#endif
#ifdef S_ISSOCK
bool is_socket(const std::string& a_path);
#endif
#ifdef S_ISDOOR
bool is_door(const std::string& a_path);
#endif
void mk_dir(const std::string& a_path);
void rm_dir(const std::string a_path);
void rm_file(const std::string a_path);
void mk_dirhier(const std::string a_path);
void rename_file(const std::string a_from, const std::string a_to);
void mk_symlink(const std::string a_from, const std::string a_to);
void mk_relative_symlink(const std::string a_from, const std::string a_to);

/** Retrieve information about a file or directory */
class filestatus
{
public:
        enum filetype {
#ifdef S_ISFIFO
                type_fifo_special,
#endif
#ifdef S_ISCHR
                type_character_special,
#endif
#ifdef S_ISDIR
                type_directory,
#endif
#ifdef S_ISREG
                type_regular_file,
#endif
#ifdef S_ISBLK
                type_block_special,
#endif
#ifdef S_ISLNK
                type_link,
#endif
#ifdef S_ISSOCK
                type_socket,
#endif
#ifdef S_ISDOOR
                type_door,
#endif
                type_unknown
        };
        typedef mode_t mode_type;
        typedef ino_t inode_type;
        typedef dev_t device_type;
        typedef uint32 major_type;
        typedef uint32 minor_type;
        typedef nlink_t num_links_type;
        typedef uid_t uid_type;
        typedef gid_t gid_type;
        typedef uint64 size_type;
        typedef time_t time_type;

        filestatus();
        filestatus(const std::string a_path);
        ~filestatus();

        void path(const std::string a_path);
        const std::string path(void) const;
        const filetype type(void) const;
        const std::string link(void) const;

        const mode_type mode(void) const;
        const inode_type inode(void) const;
        const device_type dev(void) const;
        const device_type rdev(void) const;
        const major_type get_major(void) const;
        const minor_type get_minor(void) const;
        const num_links_type num_links(void) const;
        const uid_type uid(void) const;
        const gid_type gid(void) const;
        const size_type size(void) const;
        const time_type last_access_time(void) const;
        const time_type last_modification_time(void) const;
        const time_type last_status_change_time(void) const;
        const size_type blocksize(void) const;
        const size_type blocks(void) const;
        const bool uid_is_found(void) const;
        const bool gid_is_found(void) const;
        const std::string uid_name(void) const;
        const std::string gid_name(void) const;

        void clear(void);

#ifdef S_ISFIFO
        const bool is_fifo_special(void) const;
#endif
#ifdef S_ISCHR
        const bool is_character_special(void) const;
#endif
#ifdef S_ISBLK
        const bool is_block_special(void) const;
#endif
#ifdef S_ISLNK
        const bool is_link(void) const;
#endif
#ifdef S_ISSOCK
        const bool is_socket(void) const;
#endif
#ifdef S_ISDOOR
        const bool is_door(void) const;
#endif
#ifdef S_ISDIR
        const bool is_directory(void) const;
#endif
#ifdef S_ISREG
        const bool is_regular_file(void) const;
#endif

#ifdef S_IRUSR
        const bool user_can_read(void) const;
#endif
#ifdef S_IWUSR
        const bool user_can_write(void) const;
#endif
#ifdef S_IXUSR
        const bool user_can_execute(void) const;
#endif
#ifdef S_IRGRP
        const bool group_can_read(void) const;
#endif
#ifdef S_IWGRP
        const bool group_can_write(void) const;
#endif
#ifdef S_IXGRP
        const bool group_can_execute(void) const;
#endif
#ifdef S_IROTH
        const bool other_can_read(void) const;
#endif
#ifdef S_IWOTH
        const bool other_can_write(void) const;
#endif
#ifdef S_IXOTH
        const bool other_can_execute(void) const;
#endif
#ifdef S_ISUID
        const bool is_set_uid(void) const;
#endif
#ifdef S_ISGID
        const bool is_set_gid(void) const;
#endif
#ifdef S_ISVTX
        const bool is_set_sticky(void) const;
#endif

private:
        std::string m_path;
        struct stat m_stat;
        std::string m_link;
        major_type m_major;
        minor_type m_minor;
        bool m_uidfound;
        bool m_gidfound;
        std::string m_uname;
        std::string m_gname;
};

/** Retrieve a list of files in a subdirectory that match a given wildcard
        filename
        
        Pathnames to the files are not included.
 */
class subdirectory : public std::vector<std::string>
{
public:
        typedef std::vector<std::string> type;

        subdirectory();
        subdirectory(const subdirectory& a_class);
        subdirectory(const std::string a_path, const std::string a_filter = "*");
        ~subdirectory();

        void assign(const subdirectory& a_class);

        const type&
                path(const std::string a_path, const std::string a_filter = "*");

        subdirectory& operator=(const subdirectory& a_class);

private:
};

void rm_recursive(const std::string a_path);

/** Retrieve a list of pathnames that match a given wildcard path

        Pathnames to the files are included.  Depending on the wildcard path given,
        files listed may be in multiple directories.
 */
class directory : public std::vector<std::string>
{
public:
        typedef std::vector<std::string> type;

        directory();
        directory(const directory& a_class);
        directory(const std::string& a_str);
        ~directory();

        const type& path(const std::string& a_path);

private:
};

/** Retrieve information about a filesystem */
class filesystem {
public:
        typedef uint64 size_type;

        filesystem();
        filesystem(const std::string& a_path);

        void clear(void);

        void path(const std::string& a_path);
        const std::string path(void) const;
        const size_type blocksize(void) const;
        const size_type total_blocks(void) const;
        const size_type free_blocks(void) const;
        const size_type used_blocks(void) const;
        const size_type total_inodes(void) const;
        const size_type free_inodes(void) const;
        const size_type used_inodes(void) const;

        filesystem& operator=(const filesystem& a_class);

private:
        std::string m_path;
        struct STATFS m_statfs;
};

/** A simple locking mechanism */
class simple_lock {
public:
        typedef pid_t pid_type;

        simple_lock();
        simple_lock(const std::string& a_lockfile);
        ~simple_lock();

        void clear(void);

        void lockfile(const std::string& a_lockfile);
        const std::string lockfile(void) const;

        const pid_type locked_by(void) const;
        const bool is_locked(void) const;
        bool lock(void);
        void unlock(void);
private:
        std::string m_lockfile;
};

#endif

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