1 files changed, 69 insertions, 11 deletions

diff --git a/coreutils/md5_sha1_sum.c b/coreutils/md5_sha1_sum.c
index 3b897c18f..050d46701 100644
--- a/coreutils/md5_sha1_sum.c
+++ b/coreutils/md5_sha1_sum.c
@@ -6,6 +6,64 @@
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 
+//usage:#define md5sum_trivial_usage
+//usage:       "[FILE]..."
+//usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: md5sum -c [-sw] [FILE]")
+//usage:#define md5sum_full_usage "\n\n"
+//usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " MD5 checksums"
+//usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
+//usage:     "\nOptions:"
+//usage:     "\n        -c      Check sums against given list"
+//usage:     "\n        -s      Don't output anything, status code shows success"
+//usage:     "\n        -w      Warn about improperly formatted checksum lines"
+//usage:        )
+//usage:
+//usage:#define md5sum_example_usage
+//usage:       "$ md5sum < busybox\n"
+//usage:       "6fd11e98b98a58f64ff3398d7b324003\n"
+//usage:       "$ md5sum busybox\n"
+//usage:       "6fd11e98b98a58f64ff3398d7b324003  busybox\n"
+//usage:       "$ md5sum -c -\n"
+//usage:       "6fd11e98b98a58f64ff3398d7b324003  busybox\n"
+//usage:       "busybox: OK\n"
+//usage:       "^D\n"
+//usage:
+//usage:#define sha1sum_trivial_usage
+//usage:       "[FILE]..."
+//usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: sha1sum -c [-sw] [FILE]")
+//usage:#define sha1sum_full_usage "\n\n"
+//usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA1 checksums"
+//usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
+//usage:     "\nOptions:"
+//usage:     "\n        -c      Check sums against given list"
+//usage:     "\n        -s      Don't output anything, status code shows success"
+//usage:     "\n        -w      Warn about improperly formatted checksum lines"
+//usage:        )
+//usage:
+//usage:#define sha256sum_trivial_usage
+//usage:       "[FILE]..."
+//usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: sha256sum -c [-sw] [FILE]")
+//usage:#define sha256sum_full_usage "\n\n"
+//usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA256 checksums"
+//usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
+//usage:     "\nOptions:"
+//usage:     "\n        -c      Check sums against given list"
+//usage:     "\n        -s      Don't output anything, status code shows success"
+//usage:     "\n        -w      Warn about improperly formatted checksum lines"
+//usage:        )
+//usage:
+//usage:#define sha512sum_trivial_usage
+//usage:       "[FILE]..."
+//usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: sha512sum -c [-sw] [FILE]")
+//usage:#define sha512sum_full_usage "\n\n"
+//usage:       "Print" IF_FEATURE_MD5_SHA1_SUM_CHECK(" or check") " SHA512 checksums"
+//usage:        IF_FEATURE_MD5_SHA1_SUM_CHECK( "\n"
+//usage:     "\nOptions:"
+//usage:     "\n        -c      Check sums against given list"
+//usage:     "\n        -s      Don't output anything, status code shows success"
+//usage:     "\n        -w      Warn about improperly formatted checksum lines"
+//usage:        )
+
 #include "libbb.h"
 
 /* This is a NOEXEC applet. Be very careful! */
@@ -42,7 +100,6 @@ static uint8_t *hash_file(const char *filename)
                 md5_ctx_t md5;
         } context;
         uint8_t *hash_value = NULL;
-        RESERVE_CONFIG_UBUFFER(in_buf, 4096);
         void FAST_FUNC (*update)(void*, const void*, size_t);
         void FAST_FUNC (*final)(void*, void*);
         char hash_algo;
@@ -54,7 +111,7 @@ static uint8_t *hash_file(const char *filename)
 
         hash_algo = applet_name[3];
 
-        /* figure specific hash algorithims */
+        /* figure specific hash algorithms */
         if (ENABLE_MD5SUM && hash_algo == HASH_MD5) {
                 md5_begin(&context.md5);
                 update = (void*)md5_hash;
@@ -79,17 +136,18 @@ static uint8_t *hash_file(const char *filename)
                 xfunc_die(); /* can't reach this */
         }
 
-        while ((count = safe_read(src_fd, in_buf, 4096)) > 0) {
-                update(&context, in_buf, count);
-        }
-
-        if (count == 0) {
-                final(&context, in_buf);
-                hash_value = hash_bin_to_hex(in_buf, hash_len);
+        {
+                RESERVE_CONFIG_UBUFFER(in_buf, 4096);
+                while ((count = safe_read(src_fd, in_buf, 4096)) > 0) {
+                        update(&context, in_buf, count);
+                }
+                if (count == 0) {
+                        final(&context, in_buf);
+                        hash_value = hash_bin_to_hex(in_buf, hash_len);
+                }
+                RELEASE_CONFIG_BUFFER(in_buf);
         }
 
-        RELEASE_CONFIG_BUFFER(in_buf);
-
         if (src_fd != STDIN_FILENO) {
                 close(src_fd);
         }