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| author | Andrew Ilijic <ilijic.andrew@gmail.com> | 2019-10-17 11:03:19 -0400 |
|---|---|---|
| committer | Rob Landley <rob@landley.net> | 2019-10-17 16:03:18 -0500 |
| commit | 0b34a5637d91428ef5d87769a4c2698d7a1c2b0f (patch) | |
| tree | 1bfb0b0f23f14a3d590b23eaa4a9de1b388cd9e6 /toys/posix | |
| parent | 84f5ee5efa546eb6919033195a36561e5b0e667b (diff) | |
| download | toybox-0b34a5637d91428ef5d87769a4c2698d7a1c2b0f.tar.gz | |
ls: Ensure file names are separated by 2 spaces
We need two spaces between filenames because that is the convention
followed by other implementations. More importantly, if we do not have
two spaces, certain Unicode file names cause filenames to run together.
In Unicode, combining characters come before the character they modify.
If a filename ends in a combining character, the combining character
attaches to the space that follows it, causing the space not to be
visible. Having a two-space gap stops the above issue from happening.
For context and a bit more information, see mailing list link below.
https://www.mail-archive.com/toybox@lists.landley.net/msg05986.html
Diffstat (limited to 'toys/posix')
| -rw-r--r-- | toys/posix/ls.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/toys/posix/ls.c b/toys/posix/ls.c index 0956902f..d4c0211a 100644 --- a/toys/posix/ls.c +++ b/toys/posix/ls.c @@ -384,7 +384,8 @@ static void listfiles(int dirfd, struct dirtree *indir) memset(colsizes, 0, columns*sizeof(unsigned)); for (ul=0; ul<dtlen; ul++) { entrylen(sort[next_column(ul, dtlen, columns, &c)], len); - *len += totpad+1; + // Add `2` to `totpad` to ensure two spaces between filenames + *len += totpad+2; if (c == columns) break; // Expand this column if necessary, break if that puts us over budget if (*len > colsizes[c]) { |