apathmax

util/agetcwd.c

@@ -1,6 +1,4 @@
 /* See LICENSE file for copyright and license details. */
-#include <stdio.h>
-#include <stdlib.h>
 #include <unistd.h>
 #include "../util.h"
 
@@ -10,10 +8,7 @@ agetcwd(void)
 	char *buf;
 	long size;
 
-	if((size = pathconf(".", _PC_PATH_MAX)) == -1)
-		size = BUFSIZ;
-	if(!(buf = malloc(size)))
-		eprintf("malloc:");
+	apathmax(&buf, &size);
 	if(!getcwd(buf, size))
 		eprintf("getcwd:");
 	return buf;

util/apathmax.c

@@ -0,0 +1,24 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "../util.h"
+
+void
+apathmax(char **p, long *size)
+{
+#ifdef PATH_MAX
+	*size = PATH_MAX;
+#else
+	errno = 0;
+	if((*size = pathconf(".", _PC_PATH_MAX)) == -1) {
+		if(errno == 0)
+			*size = BUFSIZ;
+		else
+			eprintf("pathconf:");
+	}
+#endif
+	if(!(*p = malloc(*size)))
+		eprintf("malloc:");
+}

util/enmasse.c

@@ -24,10 +24,7 @@ enmasse(int argc, char **argv, int (*fn)(const char *, const char *))
 	else
 		dir = (argc == 1) ? "." : argv[--argc];
 
-	if((size = pathconf(dir, _PC_PATH_MAX)) == -1)
-		size = BUFSIZ;
-	if(!(buf = malloc(size)))
-		eprintf("malloc:");
+	apathmax(&buf, &size);
 	for(i = 0; i < argc; i++) {
 		if(snprintf(buf, size, "%s/%s", dir, basename(argv[i])) > size)
 			eprintf("%s/%s: filename too long\n", dir, basename(argv[i]));