Skip to content

Update _tmpnam() to reflect UCRT behavior breaking change #424

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
colin-home merged 2 commits into from
Sep 11, 2018
+1 −1
Merged

Update _tmpnam() to reflect UCRT behavior breaking change #424

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
65cb091
Update tempnam-wtempnam-tmpnam-wtmpnam.md
Sep 11, 2018
3468aef
Update tempnam-wtempnam-tmpnam-wtmpnam.md
Sep 11, 2018
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion docs/c-runtime-library/reference/tempnam-wtempnam-tmpnam-wtmpnam.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,7 @@ Each of these functions returns a pointer to the name generated or **NULL** if t

## Remarks

Each of these functions returns the name of a file that does not currently exist. **tmpnam** returns a name unique in the current working directory and **_tempnam** lets you generate a unique name in a directory other than the current one. Note than when a file name is pre-pended with a backslash and no path information, such as \fname21, this indicates that the name is valid for the current working directory.
Each of these functions returns the name of a file that does not currently exist. **tmpnam** returns a name that's unique in the designated Windows temporary directory returned by [GetTempPathW](/windows/desktop/api/fileapi/nf-fileapi-gettemppathw). **\_tempnam** generates a unique name in a directory other than the designated one. Note than when a file name is pre-pended with a backslash and no path information, such as \fname21, this indicates that the name is valid for the current working directory.

For **tmpnam**, you can store this generated file name in *str*. If *str* is **NULL**, then **tmpnam** leaves the result in an internal static buffer. Thus any subsequent calls destroy this value. The name generated by **tmpnam** consists of a program-generated file name and, after the first call to **tmpnam**, a file extension of sequential numbers in base 32 (.1-.vvu, when **TMP_MAX** in STDIO.H is 32,767).

Expand Down