file/fat: rework utime function as modtime extension

This eliminates the dependence on a special struct since we were only
using the modtime anyway. But it no longer fits any known standard APIs
so I have converted it to our own extension instead. This can still be
adapted to existing hosted APIs if the need arises.

Change-Id: Ic8800698ddfd3a1a48b7cf921c0d0f865302d034

firmware/common/file.c

@@ -1123,9 +1123,11 @@ file_error:
     return rc;
 }
 
-int utime(const char *path, const struct utimbuf* times)
+/** Extensions **/
+
+int modtime(const char *path, time_t modtime)
 {
-    DEBUGF("utime(path=\"%s\",times->modtime=%u)\n", path, times->modtime);
+    DEBUGF("modtime(path=\"%s\",modtime=%d)\n", path, (int) modtime);
 
     int rc, open1rc = -1;
     struct filestr_base pathstr;
@@ -1133,25 +1135,22 @@ int utime(const char *path, const struct utimbuf* times)
 
     file_internal_lock_WRITER();
 
-    if (!times)
-        FILE_ERROR(EINVAL, -1);
-
     open1rc = open_stream_internal(path, FF_ANYTYPE | FF_PARENTINFO,
                                    &pathstr, &pathinfo);
     if (open1rc <= 0)
     {
         DEBUGF("Failed opening path: %d\n", open1rc);
         if (open1rc == 0)
-            FILE_ERROR(ENOENT, -2);
+            FILE_ERROR(ENOENT, -1);
         else
             FILE_ERROR(ERRNO, open1rc * 10 - 1);
     }
 
-    rc = fat_utime(&pathinfo.parentinfo.fatfile, pathstr.fatstr.fatfilep,
-                   times);
+    rc = fat_modtime(&pathinfo.parentinfo.fatfile, pathstr.fatstr.fatfilep,
+                     modtime);
     if (rc < 0)
     {
-        DEBUGF("I/O error during utime: %d\n", rc);
+        DEBUGF("I/O error during modtime: %d\n", rc);
         FILE_ERROR(ERRNO, rc * 10 - 2);
     }
 
@@ -1162,8 +1161,6 @@ file_error:
     return rc;
 }
 
-/** Extensions **/
-
 /* get the binary size of a file (in bytes) */
 off_t filesize(int fildes)
 {

firmware/drivers/fat.c

@@ -2276,8 +2276,8 @@ fat_error:
     return rc;
 }
 
-int fat_utime(struct fat_file *parent, struct fat_file *file,
-              const struct utimbuf *times)
+int fat_modtime(struct fat_file *parent, struct fat_file *file,
+                time_t modtime)
 {
     struct bpb * const fat_bpb = FAT_BPB(parent->volume);
 
@@ -2297,7 +2297,7 @@ int fat_utime(struct fat_file *parent, struct fat_file *file,
 
     uint16_t date;
     uint16_t time;
-    dostime_localtime(times->modtime, &date, &time);
+    dostime_localtime(modtime, &date, &time);
 
     ent->wrttime    = htole16(time);
     ent->wrtdate    = htole16(date);

firmware/export/fat.h

@@ -23,9 +23,6 @@
 
 #include <stdbool.h>
 #include <sys/types.h>
-#if defined(__PCTOOL__) || defined(SIMULATOR) || ((CONFIG_PLATFORM & PLATFORM_HOSTED) == PLATFORM_HOSTED)
-#include <utime.h>
-#endif
 #include <time.h>
 #include "config.h"
 #include "system.h"
@@ -143,8 +140,8 @@ enum fat_remove_op           /* what should fat_remove(), remove? */
 int fat_remove(struct fat_file *file, enum fat_remove_op what);
 int fat_rename(struct fat_file *parent, struct fat_file *file,
                const unsigned char *newname);
-int fat_utime(struct fat_file *parent, struct fat_file *file,
-              const struct utimbuf *utimes);
+int fat_modtime(struct fat_file *parent, struct fat_file *file,
+                time_t modtime);
 
 /** File stream functions **/
 int fat_closewrite(struct fat_filestr *filestr, uint32_t size,

firmware/include/file.h

@@ -85,8 +85,8 @@ int fdprintf(int fildes, const char *fmt, ...) ATTRIBUTE_PRINTF(2, 3);
 #ifndef rename
 #define rename          FS_PREFIX(rename)
 #endif
-#ifndef utime
-#define utime           FS_PREFIX(utime)
+#ifndef modtime
+#define modtime         FS_PREFIX(modtime)
 #endif
 #ifndef filesize
 #define filesize        FS_PREFIX(filesize)

firmware/include/filesystem-native.h

@@ -55,7 +55,7 @@ ssize_t read(int fildes, void *buf, size_t nbyte);
 ssize_t write(int fildes, const void *buf, size_t nbyte);
 int     remove(const char *path);
 int     rename(const char *old, const char *new);
-int     utime(const char *path, const struct utimbuf* times);
+int     modtime(const char *path, time_t modtime);
 off_t   filesize(int fildes);
 int     fsamefile(int fildes1, int fildes2);
 int     relate(const char *path1, const char *path2);

firmware/libc/include/time.h

@@ -28,12 +28,6 @@ struct tm
 #if !defined(_TIME_T_DEFINED) && !defined(_TIME_T_DECLARED)
 typedef long time_t;
 
-struct utimbuf
-{
-    time_t actime;
-    time_t modtime;
-};
-
 /* this define below is used by the mingw headers to prevent duplicate
    typedefs */
 #define _TIME_T_DEFINED