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register_tempfile(): new function to handle an existing temporary file

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Allow an existing file to be registered with the tempfile-handling
infrastructure; in particular, arrange for it to be deleted on program
exit. This can be used if the temporary file has to be created in a
more complicated way than just open(). For example:

* If the file itself needs to be created via the lockfile API
* If it is not a regular file (e.g., a socket)

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Haggerty 2015-08-10 11:47:44 +02:00 committed by Junio C Hamano
parent 354ab11206
commit 99397152a3
2 changed files with 16 additions and 0 deletions
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8
tempfile.c
View File

@ -137,6 +137,14 @@ int create_tempfile(struct tempfile *tempfile, const char *path)
return tempfile->fd; return tempfile->fd;
} }
void register_tempfile(struct tempfile *tempfile, const char *path)
{
prepare_tempfile_object(tempfile);
strbuf_add_absolute_path(&tempfile->filename, path);
tempfile->owner = getpid();
tempfile->active = 1;
}
int mks_tempfile_sm(struct tempfile *tempfile, int mks_tempfile_sm(struct tempfile *tempfile,
const char *template, int suffixlen, int mode) const char *template, int suffixlen, int mode)
{ {

8
tempfile.h
View File

@ -92,6 +92,14 @@ struct tempfile {
*/ */
extern int create_tempfile(struct tempfile *tempfile, const char *path); extern int create_tempfile(struct tempfile *tempfile, const char *path);
/*
* Register an existing file as a tempfile, meaning that it will be
* deleted when the program exits. The tempfile is considered closed,
* but it can be worked with like any other closed tempfile (for
* example, it can be opened using reopen_tempfile()).
*/
extern void register_tempfile(struct tempfile *tempfile, const char *path);
/* /*
* mks_tempfile functions * mks_tempfile functions