On Fri, Jan 03, 2014 at 05:22:42PM +0100, m...@zarb.org wrote:
> From: Michael Scherer <m...@zarb.org>
>
> ---
> src/shared/apparmor-util.c | 15 +++++++++++++++
> src/shared/apparmor-util.h | 1 +
> 2 files changed, 16 insertions(+)
>
> diff --git a/src/shared/apparmor-util.c b/src/shared/apparmor-util.c
> index 2b85da1..a75bec4 100644
> --- a/src/shared/apparmor-util.c
> +++ b/src/shared/apparmor-util.c
> @@ -39,3 +39,18 @@ bool use_apparmor(void) {
>
> return use_apparmor_cached;
> }
> +
> +int switch_apparmor_profile(const char * profile) {
> + _cleanup_free_ char *filename = NULL;
> + _cleanup_fclose_ FILE *proc = NULL;
> +
> + if (asprintf (&filename, "/proc/%d/attr/exec", getpid()) <0)
> + return -ENOMEM;
> +
> + proc = fopen (filename, "w");
> + if (! proc)
> + return -errno;
> +
> + fprintf (proc, "exec %s\n", profile);
> + return 0;
> +}
This should be something like
int apparmor_switch_profile(const char *profile) {
char *p, *t;
p = procfs_file_alloca(0, "attr/exec");
t = strappenda("exec ", profile);
return write_string_file(p, t);
}
Totally untested, but there's no unnecessary malloc, and there's
a meaningful error returned if the thing most likely to fail, i.e. the
write, actually fails.
> diff --git a/src/shared/apparmor-util.h b/src/shared/apparmor-util.h
> index 4b056a1..f27608d 100644
> --- a/src/shared/apparmor-util.h
> +++ b/src/shared/apparmor-util.h
> @@ -24,3 +24,4 @@
> #include <stdbool.h>
>
> bool use_apparmor(void);
> +int switch_apparmor_profile(const char * profile);
const char *profile
Zbyszek
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