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-rw-r--r--src/option.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/option.h b/src/option.h
index a11fa4167b..aa55bfbac2 100644
--- a/src/option.h
+++ b/src/option.h
@@ -271,6 +271,8 @@ typedef enum {
#define SHM_SEARCHCOUNT 'S' // search stats: '[1/10]'
#define SHM_POSIX "AS" // POSIX value
#define SHM_ALL "rmfixlnwaWtToOsAIcCqFS" // all possible flags for 'shm'
+#define SHM_LEN 30 // max length of all flags together
+ // plus a NUL character
// characters for p_go:
#define GO_TERMINAL '!' // use terminal for system commands