rerere: fix overeager gc

diff --git a/compat/mingw.c b/compat/mingw.c
index 59b18dc7ca51180426a0dbf11e651a93c5eedc81..24333cb167f785cbcf29775eec1237259221e89c 100644 (file)
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -140,6 +140,39 @@ int mingw_open (const char *filename, int oflags, ...)
        return fd;
 }
 
+#undef write
+ssize_t mingw_write(int fd, const void *buf, size_t count)
+{
+       /*
+        * While write() calls to a file on a local disk are translated
+        * into WriteFile() calls with a maximum size of 64KB on Windows
+        * XP and 256KB on Vista, no such cap is placed on writes to
+        * files over the network on Windows XP.  Unfortunately, there
+        * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
+        * bigger writes fail on Windows XP.
+        * So we cap to a nice 31MB here to avoid write failures over
+        * the net without changing the number of WriteFile() calls in
+        * the local case.
+        */
+       return write(fd, buf, min(count, 31 * 1024 * 1024));
+}
+
+#undef fopen
+FILE *mingw_fopen (const char *filename, const char *otype)
+{
+       if (!strcmp(filename, "/dev/null"))
+               filename = "nul";
+       return fopen(filename, otype);
+}
+
+#undef freopen
+FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
+{
+       if (filename && !strcmp(filename, "/dev/null"))
+               filename = "nul";
+       return freopen(filename, otype, stream);
+}
+
 /*
  * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
  * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
@@ -271,8 +304,13 @@ int mingw_utime (const char *file_name, const struct utimbuf *times)
                goto revert_attrs;
        }
 
-       time_t_to_filetime(times->modtime, &mft);
-       time_t_to_filetime(times->actime, &aft);
+       if (times) {
+               time_t_to_filetime(times->modtime, &mft);
+               time_t_to_filetime(times->actime, &aft);
+       } else {
+               GetSystemTimeAsFileTime(&mft);
+               aft = mft;
+       }
        if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
                errno = EINVAL;
                rc = -1;
@@ -634,6 +672,7 @@ static int env_compare(const void *a, const void *b)
 }
 
 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
+                             const char *dir,
                              int prepend_cmd, int fhin, int fhout, int fherr)
 {
        STARTUPINFO si;
@@ -713,7 +752,7 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
 
        memset(&pi, 0, sizeof(pi));
        ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
-               env ? envblk.buf : NULL, NULL, &si, &pi);
+               env ? envblk.buf : NULL, dir, &si, &pi);
 
        if (env)
                strbuf_release(&envblk);
@@ -730,10 +769,11 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
                           int prepend_cmd)
 {
-       return mingw_spawnve_fd(cmd, argv, env, prepend_cmd, 0, 1, 2);
+       return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
 }
 
 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
+                    const char *dir,
                     int fhin, int fhout, int fherr)
 {
        pid_t pid;
@@ -756,14 +796,14 @@ pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
                                pid = -1;
                        }
                        else {
-                               pid = mingw_spawnve_fd(iprog, argv, env, 1,
+                               pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
                                                       fhin, fhout, fherr);
                                free(iprog);
                        }
                        argv[0] = argv0;
                }
                else
-                       pid = mingw_spawnve_fd(prog, argv, env, 0,
+                       pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
                                               fhin, fhout, fherr);
                free(prog);
        }