Add a comment for the return values of the magic functions.

diff --git a/src/funcs.c b/src/funcs.c
index 0bf92fe1c2509c51043ead5eb42fdec17827e5c3..db8c3cd02c1f9e719b2d14eaaf3f4a81a06a6770 100644 (file)
--- a/src/funcs.c
+++ b/src/funcs.c
@@ -27,7 +27,7 @@
 #include "file.h"
 
 #ifndef        lint
-FILE_RCSID("@(#)$File: funcs.c,v 1.95 2018/05/24 18:09:17 christos Exp $")
+FILE_RCSID("@(#)$File: funcs.c,v 1.96 2018/07/27 11:04:51 christos Exp $")
 #endif /* lint */
 
 #include "magic.h"
@@ -172,6 +172,12 @@ checkdone(struct magic_set *ms, int *rv)
        return 0;
 }
 
+/*
+ * The magic detection functions return:
+ *      1: found
+ *      0: not found
+ *     -1: error
+ */
 /*ARGSUSED*/
 protected int
 file_buffer(struct magic_set *ms, int fd, const char *inname __attribute__ ((__unused__)),
@@ -268,7 +274,7 @@ file_buffer(struct magic_set *ms, int fd, const char *inname __attribute__ ((__u
 
                rv = file_tryelf(ms, &b);
                rbuf = file_pop_buffer(ms, pb);
-               if (rv != 1) {
+               if (rv == -1) {
                        free(rbuf);
                        rbuf = NULL;
                }