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run-parts: permit dot later in file name

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See https://gist.github.com/andyshinn/3ae01fa13cb64c9d36e7#gistcomment-2044506

To test:

    mkdir /tmp/testrp
    printf "#!/bin/sh\necho test\n" > /tmp/testrp/test.sh
    chmod a+x /tmp/testrp/*
    busybox run-parts /tmp/testrp
    test
    mv /tmp/testrp/test.sh /tmp/testrp/.test.sh
    busybox run-parts /tmp/testrp
    # no output

function                                             old     new   delta
act                                                  190     200     +10

Signed-off-by: Ján Sáreník <jajomojo@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Ján Sáreník 2021-06-05 18:24:57 +02:00 committed by Denys Vlasenko
parent 947a22b332
commit 8c1f8aa016
1 changed files with 13 additions and 2 deletions
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15
debianutils/run_parts.c
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@ -113,13 +113,24 @@ enum {
};
/* Is this a valid filename (upper/lower alpha, digits,
* underscores, and hyphens only?)
* underscores, hyphens, and non-leading dots only?)
*/
static bool invalid_name(const char *c)
{
c = bb_basename(c);
while (*c && (isalnum(*c) || *c == '_' || *c == '-'))
if (*c == '.')
return *c;
/* Debian run-parts 4.8.3, manpage:
* "...the names must consist entirely of ASCII letters,
* ASCII digits, ASCII underscores, and ASCII minus-hyphens.
* However, the name must not begin with a period."
* The last sentence is a giveaway that something is fishy
* (why mention leading dot if dots are not allowed anyway?).
* Yes, you guessed it right: in fact non-leading dots ARE allowed.
*/
while (isalnum(*c) || *c == '_' || *c == '-' || *c == '.')
c++;
return *c; /* TRUE (!0) if terminating NUL is not reached */