[patch] Check memory allocation error in usr.bin/systat/vmstat.c

[Nan Xiao]

Hi tech@,

A patch for usr.bin/systat/vmstat.c, apologize if I'm wrong.

Index: vmstat.c
===================================================================
RCS file: /cvs/src/usr.bin/systat/vmstat.c,v
retrieving revision 1.82
diff -u -p -r1.82 vmstat.c
--- vmstat.c    18 Dec 2016 23:36:32 -0000      1.82
+++ vmstat.c    3 May 2018 06:19:35 -0000
@@ -180,6 +180,8 @@ initvmstat(void)

        intrloc = calloc(nintr, sizeof(long));
        intrname = calloc(nintr, sizeof(char *));
+       if (intrloc == NULL || intrname == NULL)
+               errx(2, "out of memory");

        for (i = 0; i < nintr; i++) {
                char name[128];

-- 
Best Regards
Nan Xiao(肖楠)