Merge branch 'nd/fopen-errors'

We often try to open a file for reading whose existence is
optional, and silently ignore errors from open/fopen; report such
errors if they are not due to missing files.

* nd/fopen-errors:
mingw_fopen: report ENOENT for invalid file names
mingw: verify that paths are not mistaken for remote nicknames
log: fix memory leak in open_next_file()
rerere.c: move error_errno() closer to the source system call
print errno when reporting a system call error
wrapper.c: make warn_on_inaccessible() static
wrapper.c: add and use fopen_or_warn()
wrapper.c: add and use warn_on_fopen_errors()
config.mak.uname: set FREAD_READS_DIRECTORIES for Darwin, too
config.mak.uname: set FREAD_READS_DIRECTORIES for Linux and FreeBSD
clone: use xfopen() instead of fopen()
use xfopen() in more places
git_fopen: fix a sparse 'not declared' warning

diff --cc bisect.c
Simple merge

diff --cc builtin/am.c
Simple merge

diff --cc builtin/blame.c
Simple merge

diff --cc builtin/clone.c
Simple merge

diff --cc builtin/commit.c
Simple merge

diff --cc builtin/fast-export.c
Simple merge

diff --cc builtin/fsck.c
Simple merge

diff --cc builtin/log.c
Simple merge

diff --cc builtin/merge.c
Simple merge

diff --cc builtin/pull.c
Simple merge

diff --cc commit.c
Simple merge

diff --cc compat/mingw.c
Simple merge

diff --cc config.c
Simple merge

diff --cc config.mak.uname
Simple merge

diff --cc diff.c
Simple merge

diff --cc dir.c
index 70f2de38f23ce5f9e4c107cfdb0f7901dfd22b84,be616e884e8dbbebe95d361267b12212bce2fd9d..17590638176f26e35f3a728e5cd56917e0568541
--- 1/dir.c
--- 2/dir.c
+++ b/dir.c
@@@ -752,12 -745,12 +752,12 @@@ static int add_excludes(const char *fna
  
        fd = open(fname, O_RDONLY);
        if (fd < 0 || fstat(fd, &st) < 0) {
-               if (errno != ENOENT)
-                       warn_on_inaccessible(fname);
-               if (0 <= fd)
+               if (fd < 0)
+                       warn_on_fopen_errors(fname);
+               else
                        close(fd);
 -              if (!check_index ||
 -                  (buf = read_skip_worktree_file_from_index(fname, &size, sha1_stat)) == NULL)
 +              if (!istate ||
 +                  (buf = read_skip_worktree_file_from_index(istate, fname, &size, sha1_stat)) == NULL)
                        return -1;
                if (size == 0) {
                        free(buf);

diff --cc fast-import.c
Simple merge

diff --cc git-compat-util.h
Simple merge

diff --cc remote.c
Simple merge

diff --cc sequencer.c
Simple merge

diff --cc server-info.c
Simple merge

diff --cc wrapper.c
index 708e98a96585f8f9a800e9ddae942b94ea7372b8,b117eb14a47ab8f6e3c1424241040f3930367524..4632c7d4c08c3127c4017c98c0983871f0236d93
--- 1/wrapper.c
--- 2/wrapper.c
+++ b/wrapper.c
@@@ -576,15 -602,10 +602,10 @@@ int remove_or_warn(unsigned int mode, c
        return S_ISGITLINK(mode) ? rmdir_or_warn(file) : unlink_or_warn(file);
  }
  
- void warn_on_inaccessible(const char *path)
- {
-       warning_errno(_("unable to access '%s'"), path);
- }
- 
  static int access_error_is_ok(int err, unsigned flag)
  {
 -      return err == ENOENT || err == ENOTDIR ||
 -              ((flag & ACCESS_EACCES_OK) && err == EACCES);
 +      return (is_missing_file_error(err) ||
 +              ((flag & ACCESS_EACCES_OK) && err == EACCES));
  }
  
  int access_or_warn(const char *path, int mode, unsigned flag)

diff --cc wt-status.c
Simple merge