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| author |  Johannes Schindelin <johannes.schindelin@gmx.de> | 2020-04-08 18:06:49 +0000 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2020-04-08 12:15:51 -0700 |
| commit | b6852e19794245566f7c961a434c56ca3b7a883b (patch) | |
| tree | 53b9c597b2f5dacffd158b349033c15f026641b9 /compat | |
| parent | mingw: use modern strftime implementation if possible (diff) | |
| download | tgif-b6852e19794245566f7c961a434c56ca3b7a883b.tar.xz | |
mingw: do not treat `COM0` as a reserved file name
In 4dc42c6c186 (mingw: refuse paths containing reserved names,
2019-12-21), we started disallowing file names that are reserved, e.g.
`NUL`, `CONOUT$`, etc.
This included `COM<n>` where `<n>` is a digit. Unfortunately, this
includes `COM0` but only `COM1`, ..., `COM9` are reserved, according to
the official documentation, `COM0` is mentioned in the "NT Namespaces"
section but it is explicitly _omitted_ from the list of reserved names:
https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file#naming-conventions
Tests corroborate this: it is totally possible to write a file called
`com0.c` on Windows 10, but not `com1.c`.
So let's tighten the code to disallow only the reserved `COM<n>` file
names, but to allow `COM0` again.
This fixes https://github.com/git-for-windows/git/issues/2470.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'compat')
| -rw-r--r-- | compat/mingw.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/compat/mingw.c b/compat/mingw.c index 2136744af3..f2c94f9d08 100644 --- a/compat/mingw.c +++ b/compat/mingw.c @@ -2590,12 +2590,14 @@ not_a_reserved_name: continue; } break; - case 'c': case 'C': /* COM<N>, CON, CONIN$, CONOUT$ */ + case 'c': case 'C': + /* COM1 ... COM9, CON, CONIN$, CONOUT$ */ if ((c = path[++i]) != 'o' && c != 'O') goto not_a_reserved_name; c = path[++i]; - if (c == 'm' || c == 'M') { /* COM<N> */ - if (!isdigit(path[++i])) + if (c == 'm' || c == 'M') { /* COM1 ... COM9 */ + c = path[++i]; + if (c < '1' || c > '9') goto not_a_reserved_name; } else if (c == 'n' || c == 'N') { /* CON */ c = path[i + 1]; |