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daemon: cap-get-file: Return empty string if no capability on file (RHBZ#989356).

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Return an empty string (instead of an error) if no capabilities are
set on a file, and document that in the API.
This commit is contained in:
Richard W.M. Jones
2013-07-29 14:37:50 +01:00
parent fb282e677c
commit c663ab3bb9
2 changed files with 15 additions and 1 deletions
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12
daemon/cap.c
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@@ -48,6 +48,18 @@ do_cap_get_file (const char *path)
CHROOT_OUT;
if (cap == NULL) {
/* The getcap utility (part of libcap) ignores ENODATA. It just
* means there is no capability attached to the file (RHBZ#989356).
*/
if (errno == ENODATA) {
ret = strdup ("");
if (ret == NULL) {
reply_with_perror ("strdup");
return NULL;
}
return ret;
}
reply_with_perror ("%s", path);
return NULL;
}

4
generator/actions.ml
View File

@@ -10985,7 +10985,9 @@ attached to directory C<dir>." };
shortdesc = "get the Linux capabilities attached to a file";
longdesc = "\
This function returns the Linux capabilities attached to C<path>.
The capabilities set is returned in text form (see L<cap_to_text(3)>)." };
The capabilities set is returned in text form (see L<cap_to_text(3)>).
If no capabilities are attached to a file, an empty string is returned." };
{ defaults with
name = "cap_set_file";