Merge branch 'master' of git://git.denx.de/u-boot-fdt

[platform/kernel/u-boot.git] / tools / envcrc.c

diff --git a/tools/envcrc.c b/tools/envcrc.c
index 5b0f7cd..feebbab 100644 (file)
--- a/tools/envcrc.c
+++ b/tools/envcrc.c
@@ -21,6 +21,7 @@
  * MA 02111-1307 USA
  */
 
+#include <errno.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <stdlib.h>
@@ -59,6 +60,10 @@
 # endif
 #endif /* CONFIG_ENV_IS_IN_FLASH */
 
+#if defined(ENV_IS_EMBEDDED) && !defined(CONFIG_BUILD_ENVCRC)
+# define CONFIG_BUILD_ENVCRC 1
+#endif
+
 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
 # define ENV_HEADER_SIZE       (sizeof(uint32_t) + 1)
 #else
@@ -70,14 +75,14 @@
 
 extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int);
 
-#ifdef ENV_IS_EMBEDDED
+#ifdef CONFIG_BUILD_ENVCRC
 extern unsigned int env_size;
 extern unsigned char environment;
-#endif /* ENV_IS_EMBEDDED */
+#endif /* CONFIG_BUILD_ENVCRC */
 
 int main (int argc, char **argv)
 {
-#ifdef ENV_IS_EMBEDDED
+#ifdef CONFIG_BUILD_ENVCRC
        unsigned char pad = 0x00;
        uint32_t crc;
        unsigned char *envptr = &environment,
@@ -121,7 +126,8 @@ int main (int argc, char **argv)
                        }
                        for (i = start; i != end; i += step)
                                printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
-                       fwrite(dataptr, 1, datasize, stdout);
+                       if (fwrite(dataptr, 1, datasize, stdout) != datasize)
+                               fprintf(stderr, "fwrite() failed: %s\n", strerror(errno));
                } else {
                        printf("CRC32 from offset %08X to %08X of environment = %08X\n",
                                (unsigned int) (dataptr - envptr),