From 31885cd5e38ec9807a6a7ab32660cf8c2fcf48f7 Mon Sep 17 00:00:00 2001
From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Wed, 17 Apr 2013 17:19:38 -0400
Subject: core/killall: use procfs_file_alloca

---
 src/shared/util.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/shared/util.h')

diff --git a/src/shared/util.h b/src/shared/util.h
index cfb54939cd..6575f56811 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -21,6 +21,7 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
+#include <alloca.h>
 #include <inttypes.h>
 #include <time.h>
 #include <sys/time.h>
@@ -696,3 +697,12 @@ int unlink_noerrno(const char *path);
                 strcpy(stpcpy(_c_, _a_), _b_);          \
                 _c_;                                    \
         })
+
+#define procfs_file_alloca(pid, field)                                  \
+        ({                                                              \
+                pid_t _pid_ = (pid);                                    \
+                char *_r_;                                              \
+                _r_ = alloca(sizeof("/proc/") -1 + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
+                sprintf(_r_, "/proc/%lu/" field, (unsigned long) _pid_); \
+                _r_;                                                    \
+        })
-- 
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