use PATH_MAX instead of arbitrary pnlim of 1024

1 files changed, 13 insertions, 6 deletions

diff --git a/menudriver.c b/menudriver.c
index 51a1ed9..c050d1c 100644
--- a/menudriver.c
+++ b/menudriver.c
@@ -9,6 +9,7 @@
  * Revised to C11 standard and made 64bit compatible, January 2020        *
  *------------------------------------------------------------------------*/
 
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/types.h>
@@ -16,8 +17,15 @@
 #include <unistd.h>
 #include <sys/wait.h>
 #include <signal.h>
-typedef void (*sighandler)();
-#define pnlim 1024
+
+#ifndef PATH_MAX
+#ifdef _XOPEN_PATH_MAX
+#define PATH_MAX _XOPEN_PATH_MAX
+#else
+#define PATH_MAX _POSIX_PATH_MAX
+#endif
+#endif
+
 struct stat buf;
 
 char *menuviewer;
@@ -179,8 +187,8 @@ void menudrive(char *dir)
       }				/* no pathnames - see below */
 
       if (S_ISDIR(buf.st_mode)) {	/* directory */
-	char hold[pnlim];
-	if (!getcwd(hold, pnlim)) {
+	char hold[PATH_MAX];
+	if (!getcwd(hold, sizeof(hold))) {
 	  fprintf(stderr, "panic: cwd too long\n"), exit(1);
         }
 
@@ -333,7 +341,6 @@ void singleton(char *fil)
 void callshell(char v[])
 {
   static char *shell = NULL;
-  sighandler oldsig;
   int pid;
 
   if (!shell) {
@@ -343,7 +350,7 @@ void callshell(char v[])
     }
   }
 
-  oldsig = signal(SIGINT, SIG_IGN);
+  void (*oldsig)(int) = signal(SIGINT, SIG_IGN);
   if ((pid = fork())) {		/* parent */
     if (pid == -1) {
       perror("UNIX error - cannot create process");