Introduce function to lstat all input files

* src/util.c (stat_file): New function.
(move_file): Use here.
* src/util.h (stat_file): Declare here.
* src/inp.c (get_input_file): Use here.
* src/patch.c (main): Use here.
(delete_file_later): Use here.
* src/pch.c (there_is_another_patch): Use here.
(intuit_diff_type): Use here.

5 files changed, 26 insertions, 21 deletions

diff --git a/src/inp.c b/src/inp.c
index 5a42e75..386dc9e 100644
--- a/src/inp.c
+++ b/src/inp.c
@@ -138,7 +138,7 @@ get_input_file (char const *filename, char const *outname, mode_t file_type)
     char *getbuf;
 
     if (inerrno == -1)
-      inerrno = lstat (filename, &instat) == 0 ? 0 : errno;
+      inerrno = stat_file (filename, &instat);
 
     /* Perhaps look for RCS or SCCS versions.  */
     if (S_ISREG (file_type)
diff --git a/src/patch.c b/src/patch.c
index 0b0fdd4..2055cb9 100644
--- a/src/patch.c
+++ b/src/patch.c
@@ -255,19 +255,19 @@ main (int argc, char **argv)
 	  if (! strcmp (inname, outname))
 	    {
 	      if (inerrno == -1)
-		inerrno = lstat (inname, &instat) ? errno : 0;
+		inerrno = stat_file (inname, &instat);
 	      outstat = instat;
 	      outerrno = inerrno;
 	    }
 	  else
-	    outerrno = lstat (outname, &outstat) ? errno : 0;
+	    outerrno = stat_file (outname, &outstat);
 
 	  if (! outerrno)
 	    {
 	      if (has_queued_output (&outstat))
 		{
 		  output_files (&outstat);
-		  outerrno = lstat (outname, &outstat) ? errno : 0;
+		  outerrno = stat_file (outname, &outstat);
 		  inerrno = -1;
 		}
 	      if (! outerrno)
@@ -618,7 +618,7 @@ main (int argc, char **argv)
 			struct stat oldst;
 			int olderrno;
 
-			olderrno = lstat (rej, &oldst) ? errno : 0;
+			olderrno = stat_file (rej, &oldst);
 			if (olderrno && olderrno != ENOENT)
 			  write_fatal ();
 		        if (! olderrno && lookup_file_id (&oldst) == CREATED)
@@ -1711,7 +1711,7 @@ delete_file_later (const char *name, const struct stat *st, bool backup)
 
   if (! st)
     {
-      if (lstat (name, &st_tmp) != 0)
+      if (stat_file (name, &st_tmp) != 0)
 	pfatal ("Can't get file attributes of %s %s", "file", name);
       st = &st_tmp;
     }
diff --git a/src/pch.c b/src/pch.c
index da6e68f..3616bc8 100644
--- a/src/pch.c
+++ b/src/pch.c
@@ -293,18 +293,16 @@ there_is_another_patch (bool need_header, mode_t *file_type)
 	  {
 	    inname = savebuf (buf, t - buf);
 	    inname[t - buf - 1] = 0;
-	    if (lstat (inname, &instat) == 0)
-	      {
-		inerrno = 0;
-		invc = -1;
-	      }
-	    else
+	    inerrno = stat_file (inname, &instat);
+	    if (inerrno)
 	      {
 		perror (inname);
 		fflush (stderr);
 		free (inname);
 		inname = 0;
 	      }
+	    else
+	      invc = -1;
 	  }
 	if (!inname) {
 	    ask ("Skip this patch? [y] ");
@@ -914,15 +912,16 @@ intuit_diff_type (bool need_header, mode_t *p_file_type)
 		  if (! stat_errno[i])
 		    st[i] = st[i0];
 		}
-	      else if (lstat (p_name[i], &st[i]) != 0)
-		stat_errno[i] = errno;
-	      else if (lookup_file_id (&st[i]) == DELETE_LATER)
-		stat_errno[i] = ENOENT;
 	      else
 		{
-		  stat_errno[i] = 0;
-		  if (posixly_correct && name_is_valid (p_name[i]))
-		    break;
+		  stat_errno[i] = stat_file (p_name[i], &st[i]);
+		  if (! stat_errno[i])
+		    {
+		      if (lookup_file_id (&st[i]) == DELETE_LATER)
+			stat_errno[i] = ENOENT;
+		      else if (posixly_correct && name_is_valid (p_name[i]))
+			break;
+		    }
 		}
 	      i0 = i;
 	    }
@@ -1007,7 +1006,7 @@ intuit_diff_type (bool need_header, mode_t *p_file_type)
       {
 	if (inname)
 	  {
-	    inerrno = lstat (inname, &instat) == 0 ? 0 : errno;
+	    inerrno = stat_file (inname, &instat);
 	    if (inerrno || (instat.st_mode & S_IFMT) == file_type)
 	      maybe_reverse (inname, inerrno, inerrno || instat.st_size == 0);
 	  }
diff --git a/src/util.c b/src/util.c
index 7fb6b05..271f79f 100644
--- a/src/util.c
+++ b/src/util.c
@@ -437,7 +437,7 @@ move_file (char const *from, bool *from_needs_removal,
   struct stat to_st;
   int to_errno;
 
-  to_errno = lstat (to, &to_st) == 0 ? 0 : errno;
+  to_errno = stat_file (to, &to_st);
   if (backup)
     create_backup (to, to_errno ? NULL : &to_st, false);
   if (! to_errno)
@@ -1649,3 +1649,8 @@ make_tempfile (char const **name, char letter, char const *real_name,
       return fd;
     }
 }
+
+int stat_file (char const *filename, struct stat *st)
+{
+  return lstat (filename, st) == 0 ? 0 : errno;
+}
diff --git a/src/util.h b/src/util.h
index f0d20aa..9a7946f 100644
--- a/src/util.h
+++ b/src/util.h
@@ -68,6 +68,7 @@ void insert_file_id (struct stat const *, enum file_id_type);
 enum file_id_type lookup_file_id (struct stat const *);
 void set_queued_output (struct stat const *, bool);
 bool has_queued_output (struct stat const *);
+int stat_file (char const *, struct stat *);
 
 enum file_attributes {
   FA_TIMES = 1,