From: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Tue, 20 Mar 2018 20:22:27 +0000 (+0100)
Subject: don't modify argv, use a counter
X-Git-Url: https://git.danieliu.xyz/?a=commitdiff_plain;h=a5a928bfc1dd049780a45e072cb4ee42de7219bf;p=st.git

don't modify argv, use a counter

on some platforms (OpenBSD) this changes the exposed argv in tools using
the kvm_* interface, such as ps and pgrep.
---

diff --git a/arg.h b/arg.h
index ba3fb3f..a22e019 100644
--- a/arg.h
+++ b/arg.h
@@ -21,28 +21,30 @@ extern char *argv0;
 					argc--;\
 					break;\
 				}\
-				for (brk_ = 0, argv[0]++, argv_ = argv;\
-						argv[0][0] && !brk_;\
-						argv[0]++) {\
+				int i_;\
+				for (i_ = 1, brk_ = 0, argv_ = argv;\
+						argv[0][i_] && !brk_;\
+						i_++) {\
 					if (argv_ != argv)\
 						break;\
-					argc_ = argv[0][0];\
+					argc_ = argv[0][i_];\
 					switch (argc_)
+
 #define ARGEND			}\
 			}
 
 #define ARGC()		argc_
 
-#define EARGF(x)	((argv[0][1] == '\0' && argv[1] == NULL)?\
+#define EARGF(x)	((argv[0][i_+1] == '\0' && argv[1] == NULL)?\
 				((x), abort(), (char *)0) :\
-				(brk_ = 1, (argv[0][1] != '\0')?\
-					(&argv[0][1]) :\
+				(brk_ = 1, (argv[0][i_+1] != '\0')?\
+					(&argv[0][i_+1]) :\
 					(argc--, argv++, argv[0])))
 
-#define ARGF()		((argv[0][1] == '\0' && argv[1] == NULL)?\
+#define ARGF()		((argv[0][i_+1] == '\0' && argv[1] == NULL)?\
 				(char *)0 :\
-				(brk_ = 1, (argv[0][1] != '\0')?\
-					(&argv[0][1]) :\
+				(brk_ = 1, (argv[0][i_+1] != '\0')?\
+					(&argv[0][i_+1]) :\
 					(argc--, argv++, argv[0])))
 
 #endif