File handling

Collaboration diagram for File handling:

Data Structures
struct	file_stat

Enumerations
enum	file_lock_flags { FILE_LOCK_NOWAIT , FILE_LOCK_WAIT }

Functions
bool	file_is_exec (const char *filename)
	Check whether a filename is executable. More...
void	file_copy_perms (const char *src, const char *dst)
	Copy file ownership and permissions from one file to another. More...
int	file_slurp (const char *filename, struct varbuf *vb, struct dpkg_error *err)
bool	file_is_locked (int lockfd, const char *filename)
	Check if a file has a lock acquired. More...
void	file_lock (int *lockfd, enum file_lock_flags flags, const char *filename, const char *filedesc)
	Lock a file. More...
void	file_unlock (int fd, const char *filename, const char *filedesc)
	Unlock a previously locked file. More...
void	file_show (const char *filename)

Detailed Description

Enumeration Type Documentation

file_lock_flags

enum file_lock_flags

Enumerator
FILE_LOCK_NOWAIT
FILE_LOCK_WAIT

Function Documentation

file_copy_perms()

void file_copy_perms	(	const char *	src,
		const char *	dst
	)

Copy file ownership and permissions from one file to another.

Parameters

src	The source filename.
dst	The destination filename.

References _, and ohshite().

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file_is_exec()

bool file_is_exec

(

const char *

filename

)

Check whether a filename is executable.

Parameters

filename

The filename to check.

Referenced by find_command().

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file_is_locked()

bool file_is_locked	(	int	lockfd,
		const char *	filename
	)

Check if a file has a lock acquired.

Parameters

lockfd	The file descriptor for the lock.
filename	The file name associated to the file descriptor.

file_lock()

void file_lock	(	int *	lockfd,
		enum file_lock_flags	flags,
		const char *	filename,
		const char *	desc
	)

Lock a file.

Parameters

lockfd	The pointer to the lock file descriptor. It must be allocated statically as its addresses is passed to a cleanup handler.
flags	The lock flags specifying what type of locking to perform.
filename	The name of the file to lock.
desc	The description of the file to lock.

References setcloexec().

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file_show()

void file_show

(

const char *

filename

)

References _, fd_fd_copy, internerr, ohshite(), pager_reap(), pager_spawn(), and dpkg_error::syserrno.

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file_slurp()

int file_slurp	(	const char *	filename,
		struct varbuf *	vb,
		struct dpkg_error *	err
	)

References _, dpkg_put_errno(), and varbuf_init().

Referenced by parse_filehash().

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file_unlock()

void file_unlock	(	int	fd,
		const char *	filename,
		const char *	filedesc
	)

Unlock a previously locked file.