fixdep: fix mmap() on msys

1 files changed, 28 insertions, 6 deletions

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index 02678a4cc..fd2e2375f 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -134,14 +134,36 @@
 void *mmap(void *start UNUSED, size_t size, int prot UNUSED,
            int flags UNUSED, int fd, off_t offset UNUSED)
 {
-        void *p = malloc(size);
+        void *p;
+        void *curP;
+        ssize_t readB;
+
+        p = malloc(size);
         if (!p)
-                return NULL;
-        if (read(fd, p, size) != size) {
-                perror("fixdep: read config");
-                free(p);
-                return NULL;
+                return (void*)((long)-1);
+
+        curP = p;
+
+        while (size > 0)
+        {
+                readB = read(fd, curP, size);
+
+                if (readB == 0)
+                {
+                        /* EOF reached */
+                        break;
+                }
+                else if (readB < 0)
+                {
+                        perror("fixdep: read config");
+                        free(p);
+                        return (void*)((long)-1);
+                }
+
+                size -= readB;
+                curP += readB;
         }
+
         return p;
 }
 void munmap(void *p, size_t size UNUSED)