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gamemode: Add a tiny safe snprintf helper

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Give it a buffer, it returns an allocated string respecting the buffer
size.

Signed-off-by: Kai Krakow <kai@kaishome.de>
This commit is contained in:
Kai Krakow 2018-10-03 01:10:30 +02:00
parent bd811c6646
commit 81a52ddc4d
1 changed files with 5 additions and 0 deletions
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daemon/gamemode.c
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@ -65,6 +65,11 @@ POSSIBILITY OF SUCH DAMAGE.
*/ */
#define CLAMP(lbound, ubound, value) MIN(MIN(lbound, ubound), MAX(MAX(lbound, ubound), value)) #define CLAMP(lbound, ubound, value) MIN(MIN(lbound, ubound), MAX(MAX(lbound, ubound), value))
/* Little helper to safely print into a buffer, returns a newly allocated string
*/
#define safe_snprintf(b, s, ...) \
(snprintf(b, sizeof(b), s, __VA_ARGS__) < (ssize_t)sizeof(b) ? strndup(b, sizeof(b)) : NULL)
/** /**
* The GameModeClient encapsulates the remote connection, providing a list * The GameModeClient encapsulates the remote connection, providing a list
* form to contain the pid and credentials. * form to contain the pid and credentials.