X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/95f51977ddc18faa2e212f30c00a39540b39f325..ca67e7b465996afb3821d6a075c4dc6a7f0f5d52:/usr/src/usr.bin/learn/selsub.c

diff --git a/usr/src/usr.bin/learn/selsub.c b/usr/src/usr.bin/learn/selsub.c
index 91f39bb1c1..6a7d3c40cf 100644
--- a/usr/src/usr.bin/learn/selsub.c
+++ b/usr/src/usr.bin/learn/selsub.c
@@ -1,9 +1,10 @@
 #ifndef lint
-static char sccsid[] = "@(#)selsub.c	4.3	(Berkeley)	5/15/86";
+static char sccsid[] = "@(#)selsub.c	4.5	(Berkeley)	10/22/87";
 #endif not lint
 
 #include "stdio.h"
 #include "sys/types.h"
+#include "sys/file.h"
 #include "sys/stat.h"
 #include "lrnref.h"
 
@@ -73,13 +74,15 @@ char *argv[];
 		printf("press RETURN; otherwise type the name of\n");
 		printf("the course you want, followed by RETURN.\n");
 		fflush(stdout);
-		gets(sname=subname);
+		if (gets(sname=subname) == NULL)
+			exit(0);
 		if (sname[0] == '\0') {
 			list("Xinfo");
 			do {
 				printf("\nWhich subject?  ");
 				fflush(stdout);
-				gets(sname=subname);
+				if (gets(sname=subname) == NULL)
+					exit(0);
 			} while (sname[0] == '\0');
 		}
 	}
@@ -94,7 +97,8 @@ char *argv[];
 		printf("and I will look for the first lesson containing it.\n");
 		printf("To start at the beginning, just hit RETURN.\n");
 		fflush(stdout);
-		gets(ans2);
+		if (gets(ans2) == NULL)
+			exit(0);
 		if (ans2[0]==0)
 			strcpy(ans2,"0");
 		else
@@ -119,11 +123,14 @@ char *argv[];
 	}
 	/* after this point, we have a working directory. */
 	/* have to call wrapup to clean up */
-	if (access(sprintf(ans1, "%s/%s/Init", direct, sname), 04)==0)
-		if (system(sprintf(ans1, "%s/%s/Init %s", direct, sname, level)) != 0) {
+	(void)sprintf(ans1, "%s/%s/Init", direct, sname);
+	if (access(ans1, R_OK)==0) {
+		(void)sprintf(ans1, "%s/%s/Init %s", direct, sname, level);
+		if (system(ans1) != 0) {
 			printf("Leaving learn.\n");
 			wrapup(1);
 		}
+	}
 }
 
 chknam(name)