made more paths be macros

1 files changed, 16 insertions, 10 deletions

diff --git a/open_files.c b/open_files.c
index 3f82c8b..9eb5c3d 100644
--- a/open_files.c
+++ b/open_files.c
@@ -3,18 +3,21 @@
 #include <unistd.h>
 #include "common.h"
 
+#define FS_FILE_NR "/proc/sys/fs/file-nr"
+
 int open_files(int argc, char **argv) {
 	FILE *f;
 	int alloc, freeh, avail;
 	if(argc > 1) {
 		if(!strcmp(argv[1], "config")) {
-			if(!(f=fopen("/proc/sys/fs/file-nr", "r"))) {
-				fprintf(stderr, "cannot open /proc/sys/fs/file-nr\n");
+			if(!(f=fopen(FS_FILE_NR, "r"))) {
+				fprintf(stderr, "cannot open " FS_FILE_NR "\n");
 				return 1;
 			}
 			if(1 != fscanf(f, "%*d %*d %d", &avail)) {
 				fclose(f);
-				fprintf(stderr, "cannot read from /proc/sys/fs/file-nr\n");
+				fprintf(stderr, "cannot read from " FS_FILE_NR
+						"\n");
 				return 1;
 			}
 			fclose(f);
@@ -26,24 +29,27 @@ int open_files(int argc, char **argv) {
 				"used.label open files\n"
 				"used.info The number of currently open files.\n"
 				"max.label max open files\n"
-				"max.info The maximum supported number of open files. Tune by modifying /proc/sys/fs/file-max.");
-			printf("used.warning %d\nused.critical %d\n", (int)(avail*0.92), (int)(avail*0.98));
+				"max.info The maximum supported number of open "
+					"files. Tune by modifying " FS_FILE_NR
+					".");
+			printf("used.warning %d\nused.critical %d\n",
+					(int)(avail*0.92), (int)(avail*0.98));
 			return 0;
 		}
 		if(!strcmp(argv[1], "autoconf")) {
-			if(0 == access("/proc/sys/fs/file-nr", R_OK))
+			if(0 == access(FS_FILE_NR, R_OK))
 				return writeyes();
 			else
-				return writeno("/proc/sys/fs/file-nr not readable");
+				return writeno(FS_FILE_NR " not readable");
 		}
 	}
-	if(!(f=fopen("/proc/sys/fs/file-nr", "r"))) {
-		fputs("cannot open /proc/sys/fs/file-nr\n", stderr);
+	if(!(f=fopen(FS_FILE_NR, "r"))) {
+		fputs("cannot open " FS_FILE_NR "\n", stderr);
 		return 1;
 	}
 	if(3 != fscanf(f, "%d %d %d", &alloc, &freeh, &avail)) {
 		fclose(f);
-		fputs("cannot read from /proc/sys/fs/file-nr\n", stderr);
+		fputs("cannot read from " FS_FILE_NR "\n", stderr);
 		return 1;
 	}
 	fclose(f);