cpp: Constify cpp argv passed to cpp_exec

Pass argv as char *const argv[] as execvp expects it.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

5 files changed, 8 insertions, 8 deletions

diff --git a/bpf_parser.y b/bpf_parser.y
index 2c566a1..6f5f2b0 100644
--- a/bpf_parser.y
+++ b/bpf_parser.y
@@ -28,7 +28,7 @@
 #include "cpp.h"
 
 int compile_filter(char *file, int verbose, int bypass, int format,
-		   bool invoke_cpp, char **cpp_argv);
+		   bool invoke_cpp, char *const cpp_argv[]);
 
 static int curr_instr = 0;
 
@@ -735,7 +735,7 @@ static void pretty_printer(const struct sock_fprog *prog, int format)
 }
 
 int compile_filter(char *file, int verbose, int bypass, int format,
-		   bool invoke_cpp, char **cpp_argv)
+		   bool invoke_cpp, char *const cpp_argv[])
 {
 	int i;
 	struct sock_fprog res;
diff --git a/cpp.c b/cpp.c
index 8e03209..30a1404 100644
--- a/cpp.c
+++ b/cpp.c
@@ -5,7 +5,7 @@
 #include "proc.h"
 #include "xmalloc.h"
 
-static size_t argv_len(char **argv)
+static size_t argv_len(char *const argv[])
 {
 	size_t len = 0;
 
@@ -15,7 +15,7 @@ static size_t argv_len(char **argv)
 	return len;
 }
 
-int cpp_exec(char *in_file, char *out_file, size_t out_len, char **argv)
+int cpp_exec(char *in_file, char *out_file, size_t out_len, char *const argv[])
 {
 	size_t argc = 7 + argv_len(argv);
 	char *tmp = xstrdup(in_file);
diff --git a/cpp.h b/cpp.h
index 45c42ac..1cf0a35 100644
--- a/cpp.h
+++ b/cpp.h
@@ -1,6 +1,6 @@
 #ifndef CPP_H
 #define CPP_H
 
-extern int cpp_exec(char *in_file, char *out_file, size_t out_len, char **argv);
+extern int cpp_exec(char *in_file, char *out_file, size_t out_len, char *const argv[]);
 
 #endif
diff --git a/trafgen_conf.h b/trafgen_conf.h
index db3258f..b171798 100644
--- a/trafgen_conf.h
+++ b/trafgen_conf.h
@@ -57,7 +57,7 @@ static inline bool packet_dyn_has_only_csums(struct packet_dyn *p)
 
 extern void compile_packets_str(char *str, bool verbose, unsigned int cpu);
 extern void compile_packets(char *file, bool verbose, unsigned int cpu,
-			    bool invoke_cpp, char **cpp_argv);
+			    bool invoke_cpp, char *const cpp_argv[]);
 extern void cleanup_packets(void);
 
 #endif /* TRAFGEN_CONF */
diff --git a/trafgen_parser.y b/trafgen_parser.y
index 24370ee..79a8439 100644
--- a/trafgen_parser.y
+++ b/trafgen_parser.y
@@ -590,8 +590,8 @@ void cleanup_packets(void)
 	free(packet_dyn);
 }
 
-void compile_packets(char *file, bool verbose, unsigned int cpu, bool invoke_cpp,
-		     char **cpp_argv)
+void compile_packets(char *file, bool verbose, unsigned int cpu,
+		     bool invoke_cpp, char *const cpp_argv[])
 {
 	char tmp_file[128];
 	int ret = -1;