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random glibc macro, not provided by musl.
https://www.gnu.org/software/libc/manual/html_node/Interrupted-Primitives.html
diff --git a/sandbox/linux/suid/process_util.h b/sandbox/linux/suid/process_util.h
index b0b92c1bcc..db6a122ea8 100644
--- a/sandbox/linux/suid/process_util.h
+++ b/sandbox/linux/suid/process_util.h
@@ -12,6 +12,15 @@
#include <stdint.h>
#include <sys/types.h>
+#define TEMP_FAILURE_RETRY(expression) \
+ (__extension__({ \
+ long int __result; \
+ do \
+ __result = (long int)(expression); \
+ while (__result == -1L && errno == EINTR); \
+ __result; \
+ }))
+
// This adjusts /proc/process/oom_score_adj so the Linux OOM killer
// will prefer certain process types over others. The range for the
// adjustment is [-1000, 1000], with [0, 1000] being user accessible.
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