error exit status is 1

user/cat.c

@@ -12,12 +12,12 @@ cat(int fd)
   while((n = read(fd, buf, sizeof(buf))) > 0) {
     if (write(1, buf, n) != n) {
       printf("cat: write error\n");
-      exit(-1);
+      exit(1);
     }
   }
   if(n < 0){
     printf("cat: read error\n");
-    exit(-1);
+    exit(1);
   }
 }
 
@@ -28,13 +28,13 @@ main(int argc, char *argv[])
 
   if(argc <= 1){
     cat(0);
-    exit(-1);
+    exit(1);
   }
 
   for(i = 1; i < argc; i++){
     if((fd = open(argv[i], 0)) < 0){
       printf("cat: cannot open %s\n", argv[i]);
-      exit(-1);
+      exit(1);
     }
     cat(fd);
     close(fd);

user/forktest.c

@@ -30,19 +30,19 @@ forktest(void)
 
   if(n == N){
     print("fork claimed to work N times!\n");
-    exit(-1);
+    exit(1);
   }
 
   for(; n > 0; n--){
     if(wait(0) < 0){
       print("wait stopped early\n");
-      exit(-1);
+      exit(1);
     }
   }
 
   if(wait(0) != -1){
     print("wait got too many\n");
-    exit(-1);
+    exit(1);
   }
 
   print("fork test OK\n");

user/grep.c

@@ -41,7 +41,7 @@ main(int argc, char *argv[])
 
   if(argc <= 1){
     fprintf(2, "usage: grep pattern [file ...]\n");
-    exit(-1);
+    exit(1);
   }
   pattern = argv[1];
 
@@ -53,7 +53,7 @@ main(int argc, char *argv[])
   for(i = 2; i < argc; i++){
     if((fd = open(argv[i], 0)) < 0){
       printf("grep: cannot open %s\n", argv[i]);
-      exit(-1);
+      exit(1);
     }
     grep(pattern, fd);
     close(fd);

user/init.c

@@ -24,12 +24,12 @@ main(void)
     pid = fork();
     if(pid < 0){
       printf("init: fork failed\n");
-      exit(-1);
+      exit(1);
     }
     if(pid == 0){
       exec("sh", argv);
       printf("init: exec sh failed\n");
-      exit(-1);
+      exit(1);
     }
     while((wpid=wait(0)) >= 0 && wpid != pid){
       //printf("zombie!\n");

user/kill.c

@@ -9,7 +9,7 @@ main(int argc, char **argv)
 
   if(argc < 2){
     fprintf(2, "usage: kill pid...\n");
-    exit(-1);
+    exit(1);
   }
   for(i=1; i<argc; i++)
     kill(atoi(argv[i]));

user/ln.c

@@ -7,7 +7,7 @@ main(int argc, char *argv[])
 {
   if(argc != 3){
     fprintf(2, "Usage: ln old new\n");
-    exit(-1);
+    exit(1);
   }
   if(link(argv[1], argv[2]) < 0)
     fprintf(2, "link %s %s: failed\n", argv[1], argv[2]);

user/mkdir.c

@@ -9,7 +9,7 @@ main(int argc, char *argv[])
 
   if(argc < 2){
     fprintf(2, "Usage: mkdir files...\n");
-    exit(-1);
+    exit(1);
   }
 
   for(i = 1; i < argc; i++){

user/rm.c

@@ -9,7 +9,7 @@ main(int argc, char *argv[])
 
   if(argc < 2){
     fprintf(2, "Usage: rm files...\n");
-    exit(-1);
+    exit(1);
   }
 
   for(i = 1; i < argc; i++){

user/sh.c

@@ -65,7 +65,7 @@ runcmd(struct cmd *cmd)
   struct redircmd *rcmd;
 
   if(cmd == 0)
-    exit(-1);
+    exit(1);
 
   switch(cmd->type){
   default:
@@ -74,7 +74,7 @@ runcmd(struct cmd *cmd)
   case EXEC:
     ecmd = (struct execcmd*)cmd;
     if(ecmd->argv[0] == 0)
-      exit(-1);
+      exit(1);
     exec(ecmd->argv[0], ecmd->argv);
     fprintf(2, "exec %s failed\n", ecmd->argv[0]);
     break;
@@ -84,7 +84,7 @@ runcmd(struct cmd *cmd)
     close(rcmd->fd);
     if(open(rcmd->file, rcmd->mode) < 0){
       fprintf(2, "open %s failed\n", rcmd->file);
-      exit(-1);
+      exit(1);
     }
     runcmd(rcmd->cmd);
     break;
@@ -175,7 +175,7 @@ void
 panic(char *s)
 {
   fprintf(2, "%s\n", s);
-  exit(-1);
+  exit(1);
 }
 
 int

user/wc.c

@@ -27,7 +27,7 @@ wc(int fd, char *name)
   }
   if(n < 0){
     printf("wc: read error\n");
-    exit(-1);
+    exit(1);
   }
   printf("%d %d %d %s\n", l, w, c, name);
 }
@@ -45,7 +45,7 @@ main(int argc, char *argv[])
   for(i = 1; i < argc; i++){
     if((fd = open(argv[i], 0)) < 0){
       printf("wc: cannot open %s\n", argv[i]);
-      exit(-1);
+      exit(1);
     }
     wc(fd, argv[i]);
     close(fd);