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ls: Always leave room for the NULL byte in the link target

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Otherwise, if the length of the link target is the same as BUFSIZ, we
will try to write past the end of buf.
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Michael Forney 2014-12-08 02:19:34 +00:00 committed by sin
parent 46ea55a258
commit 573ef00c91
1 changed files with 1 additions and 1 deletions
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2
ls.c
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@ -300,7 +300,7 @@ output(Entry *ent)
printf("%10lu ", (unsigned long)ent->size); printf("%10lu ", (unsigned long)ent->size);
printf("%s %s%s", buf, ent->name, indicator(ent->mode)); printf("%s %s%s", buf, ent->name, indicator(ent->mode));
if (S_ISLNK(ent->mode)) { if (S_ISLNK(ent->mode)) {
if ((len = readlink(ent->name, buf, sizeof buf)) < 0) if ((len = readlink(ent->name, buf, sizeof buf - 1)) < 0)
eprintf("readlink %s:", ent->name); eprintf("readlink %s:", ent->name);
buf[len] = '\0'; buf[len] = '\0';
printf(" -> %s%s", buf, indicator(ent->tmode)); printf(" -> %s%s", buf, indicator(ent->tmode));