alternatives-update.cpp File Reference

Include dependency graph for alternatives-update.cpp:

Typedefs
typedef std::map< std::string, bool >	bool_hash
Enumerations
enum	command_type { UNKNOWN, OBSOLETE, IGNORE }
Functions
bool	dir_in_alt (const char *linkname)
bool	relink (const char *points_to, const char *linkname, bool is_update=false)
void	remove_alternative (const char *int_link, const char *ext_link)
bool	update_alternative (const char *link_dir, const char *int_link, const char *ext_link, const char *points_to)
bool	update_remove (const std::string &linkdir)
bool	setup_new (const std::string &linkdir)
void	remove_compat (const std::string &linkdir, const char *oldname)
void	usage (int retcode)
int	main (int argc, char *argv[])
Variables
AltStorage *	alts = 0
bool	verbose = false
bool_hash	done

---

Typedef Documentation

typedef std::map<std::string, bool> bool_hash

hash, to process altarnatives only once. key -> alternative name, value -> present flag

---

Enumeration Type Documentation

enum command_type

type of the command Enumeration values: UNKNOWN  unknown, for error messages OBSOLETE  remove obsolete links before update IGNORE

---

Function Documentation

bool dir_in_alt (  const char *  linkname  )

checks if directory is in alternatives too Parameters: linkname  name of the symlink Returns: true if directory of alternative is alternative, otherwise false

int main (  int  argc, char *  argv[] )

Main function

bool relink (  const char *  points_to, const char *  linkname, bool  is_update = false )

check where link points to and relink if nesessary Parameters: points_to  where must link points to linkname  path to symlink is_update  made warnings about recreation only on update Returns: true if symlinks was recreated, otherwise false Exceptions: Ing::glibc_error

void remove_alternative (  const char *  int_link, const char *  ext_link )

remove symlinks for removed alternative Parameters: int_link  internal alternative link (in /etc/alternatives) ext_link  external (real) alternative link Exceptions: Ing::glibc_error

void remove_compat (  const std::string &  linkdir, const char *  oldname )

remove old style alternatives symlink, we will remove only if symlink corresponds to some new existing alternative Parameters: linkdir  directory with symlinks oldname  name of the obsoleted symlink Exceptions: Ing::internal_error  Ing::glibc_error

bool setup_new (  const std::string &  linkdir  )

setup new alternative, create both internal and external symlinks Parameters: linkdir  direcrory with symlinks Returns: true on changes, otherwise false

bool update_alternative (  const char *  link_dir, const char *  int_link, const char *  ext_link, const char *  points_to )

update alternative symlink Parameters: link_dir  directory with internal symlinks int_link  internal symlink's name ext_link  external symlinks's name points_to  where internal symlinks must points to Returns: true on changes, otherwise false Exceptions: Ing::internal_error  Ing::glibc_error

bool update_remove (  const std::string &  linkdir  )

walk throw directory with internal symlinks, remove, or update some of them Parameters: linkdir  directory with symlinks Returns: true on changes, otherwise false

void usage (  int  retcode  )

help screen for command-line utility Parameters: retcode  exit code, possible values EXIT_SUCCESS, EXIT_FAILURE

---

Variable Documentation

AltStorage* alts = 0

Main alternatives storage

bool_hash done

list of already proceed alternatives

bool verbose = false

verbose program's output

---