*
* The caller:
*
- * * Allocates a `struct tempfile`. Once the structure is passed to
- * `create_tempfile()`, its storage must remain valid until
- * `delete_tempfile()` or `rename_tempfile()` is called on it.
- *
* * Attempts to create a temporary file by calling
- * `create_tempfile()`.
+ * `create_tempfile()`. The resources used for the temporary file are
+ * managed by the tempfile API.
*
* * Writes new content to the file by either:
*
- * * writing to the file descriptor returned by `create_tempfile()`
- * (also available via `tempfile->fd`).
+ * * writing to the `tempfile->fd` file descriptor
*
* * calling `fdopen_tempfile()` to get a `FILE` pointer for the
* open file and writing to the file using stdio.
*
- * Note that the file descriptor returned by create_tempfile()
+ * Note that the file descriptor created by create_tempfile()
* is marked O_CLOEXEC, so the new contents must be written by
* the current process, not any spawned one.
*
* `delete_tempfile()` or `rename_tempfile()`.
*
* After the temporary file is renamed or deleted, the `tempfile`
- * object may be reused or freed.
+ * object is no longer valid and should not be reused.
*
* If the program exits before `rename_tempfile()` or
* `delete_tempfile()` is called, an `atexit(3)` handler will close
* Error handling
* --------------
*
- * `create_tempfile()` returns a file descriptor on success or -1 on
- * failure. On errors, `errno` describes the reason for failure.
+ * `create_tempfile()` returns an allocated tempfile on success or NULL
+ * on failure. On errors, `errno` describes the reason for failure.
*
* `delete_tempfile()`, `rename_tempfile()`, and `close_tempfile_gently()`
* return 0 on success. On failure they set `errno` appropriately and return
/*
* Attempt to create a temporary file at the specified `path`. Return
- * a file descriptor for writing to it, or -1 on error. It is an error
- * if a file already exists at that path.
+ * a tempfile (whose "fd" member can be used for writing to it), or
+ * NULL on error. It is an error if a file already exists at that path.
*/
-extern int create_tempfile(struct tempfile *tempfile, const char *path);
+extern struct tempfile *create_tempfile(const char *path);
/*
* Register an existing file as a tempfile, meaning that it will be
* 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);
+extern struct tempfile *register_tempfile(const char *path);
/*
* know the (absolute) path of the file that was created, it can be
* read from tempfile->filename.
*
- * On success, the functions return a file descriptor that is open for
- * writing the temporary file. On errors, they return -1 and set errno
- * appropriately (except for the "x" variants, which die() on errors).
+ * On success, the functions return a tempfile whose "fd" member is open
+ * for writing the temporary file. On errors, they return NULL and set
+ * errno appropriately (except for the "x" variants, which die() on
+ * errors).
*/
/* See "mks_tempfile functions" above. */
-extern int mks_tempfile_sm(struct tempfile *tempfile,
- const char *template, int suffixlen, int mode);
+extern struct tempfile *mks_tempfile_sm(const char *template,
+ int suffixlen, int mode);
/* See "mks_tempfile functions" above. */
-static inline int mks_tempfile_s(struct tempfile *tempfile,
- const char *template, int suffixlen)
+static inline struct tempfile *mks_tempfile_s(const char *template,
+ int suffixlen)
{
- return mks_tempfile_sm(tempfile, template, suffixlen, 0600);
+ return mks_tempfile_sm(template, suffixlen, 0600);
}
/* See "mks_tempfile functions" above. */
-static inline int mks_tempfile_m(struct tempfile *tempfile,
- const char *template, int mode)
+static inline struct tempfile *mks_tempfile_m(const char *template, int mode)
{
- return mks_tempfile_sm(tempfile, template, 0, mode);
+ return mks_tempfile_sm(template, 0, mode);
}
/* See "mks_tempfile functions" above. */
-static inline int mks_tempfile(struct tempfile *tempfile,
- const char *template)
+static inline struct tempfile *mks_tempfile(const char *template)
{
- return mks_tempfile_sm(tempfile, template, 0, 0600);
+ return mks_tempfile_sm(template, 0, 0600);
}
/* See "mks_tempfile functions" above. */
-extern int mks_tempfile_tsm(struct tempfile *tempfile,
- const char *template, int suffixlen, int mode);
+extern struct tempfile *mks_tempfile_tsm(const char *template,
+ int suffixlen, int mode);
/* See "mks_tempfile functions" above. */
-static inline int mks_tempfile_ts(struct tempfile *tempfile,
- const char *template, int suffixlen)
+static inline struct tempfile *mks_tempfile_ts(const char *template,
+ int suffixlen)
{
- return mks_tempfile_tsm(tempfile, template, suffixlen, 0600);
+ return mks_tempfile_tsm(template, suffixlen, 0600);
}
/* See "mks_tempfile functions" above. */
-static inline int mks_tempfile_tm(struct tempfile *tempfile,
- const char *template, int mode)
+static inline struct tempfile *mks_tempfile_tm(const char *template, int mode)
{
- return mks_tempfile_tsm(tempfile, template, 0, mode);
+ return mks_tempfile_tsm(template, 0, mode);
}
/* See "mks_tempfile functions" above. */
-static inline int mks_tempfile_t(struct tempfile *tempfile,
- const char *template)
+static inline struct tempfile *mks_tempfile_t(const char *template)
{
- return mks_tempfile_tsm(tempfile, template, 0, 0600);
+ return mks_tempfile_tsm(template, 0, 0600);
}
/* See "mks_tempfile functions" above. */
-extern int xmks_tempfile_m(struct tempfile *tempfile,
- const char *template, int mode);
+extern struct tempfile *xmks_tempfile_m(const char *template, int mode);
/* See "mks_tempfile functions" above. */
-static inline int xmks_tempfile(struct tempfile *tempfile,
- const char *template)
+static inline struct tempfile *xmks_tempfile(const char *template)
{
- return xmks_tempfile_m(tempfile, template, 0600);
+ return xmks_tempfile_m(template, 0600);
}
/*
* `delete_tempfile()` for a `tempfile` object that has already been
* deleted or renamed.
*/
-extern void delete_tempfile(struct tempfile *tempfile);
+extern void delete_tempfile(struct tempfile **tempfile_p);
/*
* Close the file descriptor and/or file pointer if they are still
* `rename(2)`. It is a bug to call `rename_tempfile()` for a
* `tempfile` object that is not currently active.
*/
-extern int rename_tempfile(struct tempfile *tempfile, const char *path);
+extern int rename_tempfile(struct tempfile **tempfile_p, const char *path);
#endif /* TEMPFILE_H */
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