all: avoid quoting file names when possible

Quote file names using the "shell-escape" or "shell-escape-always"
methods, which quote as appropriate for most shells,
and better support copy and paste of presented names.
The "always" variant is used when the file name is
embedded in an error message with surrounding spaces.

* cfg.mk (sc_error_shell_quotes): A new syntax check rule
to suggest quotef() where appropriate.
(sc_error_shell_always_quotes): Likewise for quoteaf().
* src/system.h (quotef): A new define to apply shell quoting
when needed.  I.E. when shell character or ':' is present.
(quoteaf): Likewise, but always quote.
* src/*.c: Use quotef() and quoteaf() rather than quote()
where appropriate.
* tests/: Adjust accordingly.

1 files changed, 15 insertions, 15 deletions

diff --git a/src/cp.c b/src/cp.c
index 0ffd12d85..8fb5e444f 100644
--- a/src/cp.c
+++ b/src/cp.c
@@ -322,7 +322,7 @@ re_protect (char const *const_dst_name, size_t src_offset,
           if (utimens (dst_name, timespec))
             {
               error (0, errno, _("failed to preserve times for %s"),
-                     quote (dst_name));
+                     quoteaf (dst_name));
               return false;
             }
         }
@@ -334,7 +334,7 @@ re_protect (char const *const_dst_name, size_t src_offset,
               if (! chown_failure_ok (x))
                 {
                   error (0, errno, _("failed to preserve ownership for %s"),
-                         quote (dst_name));
+                         quoteaf (dst_name));
                   return false;
                 }
               /* Failing to preserve ownership is OK. Still, try to preserve
@@ -353,7 +353,7 @@ re_protect (char const *const_dst_name, size_t src_offset,
           if (lchmod (dst_name, p->st.st_mode) != 0)
             {
               error (0, errno, _("failed to preserve permissions for %s"),
-                     quote (dst_name));
+                     quoteaf (dst_name));
               return false;
             }
         }
@@ -436,7 +436,7 @@ make_dir_parents_private (char const *const_dir, size_t src_offset,
               if (src_errno)
                 {
                   error (0, src_errno, _("failed to get attributes of %s"),
-                         quote (src));
+                         quoteaf (src));
                   return false;
                 }
 
@@ -480,7 +480,7 @@ make_dir_parents_private (char const *const_dir, size_t src_offset,
               if (mkdir (dir, mkdir_mode) != 0)
                 {
                   error (0, errno, _("cannot make directory %s"),
-                         quote (dir));
+                         quoteaf (dir));
                   return false;
                 }
               else
@@ -496,7 +496,7 @@ make_dir_parents_private (char const *const_dir, size_t src_offset,
               if (lstat (dir, &stats))
                 {
                   error (0, errno, _("failed to get attributes of %s"),
-                         quote (dir));
+                         quoteaf (dir));
                   return false;
                 }
 
@@ -521,7 +521,7 @@ make_dir_parents_private (char const *const_dir, size_t src_offset,
                   if (lchmod (dir, stats.st_mode | S_IRWXU) != 0)
                     {
                       error (0, errno, _("setting permissions for %s"),
-                             quote (dir));
+                             quoteaf (dir));
                       return false;
                     }
                 }
@@ -529,7 +529,7 @@ make_dir_parents_private (char const *const_dir, size_t src_offset,
           else if (!S_ISDIR (stats.st_mode))
             {
               error (0, 0, _("%s exists but is not a directory"),
-                     quote (dir));
+                     quoteaf (dir));
               return false;
             }
           else
@@ -547,7 +547,7 @@ make_dir_parents_private (char const *const_dir, size_t src_offset,
 
   else if (!S_ISDIR (stats.st_mode))
     {
-      error (0, 0, _("%s exists but is not a directory"), quote (dst_dir));
+      error (0, 0, _("%s exists but is not a directory"), quoteaf (dst_dir));
       return false;
     }
   else
@@ -574,7 +574,7 @@ target_directory_operand (char const *file, struct stat *st, bool *new_dst)
   if (err)
     {
       if (err != ENOENT)
-        error (EXIT_FAILURE, err, _("failed to access %s"), quote (file));
+        error (EXIT_FAILURE, err, _("failed to access %s"), quoteaf (file));
       *new_dst = true;
     }
   return is_a_dir;
@@ -597,7 +597,7 @@ do_copy (int n_files, char **file, const char *target_directory,
         error (0, 0, _("missing file operand"));
       else
         error (0, 0, _("missing destination file operand after %s"),
-               quote (file[0]));
+               quoteaf (file[0]));
       usage (EXIT_FAILURE);
     }
 
@@ -609,7 +609,7 @@ do_copy (int n_files, char **file, const char *target_directory,
                  "and --no-target-directory (-T)"));
       if (2 < n_files)
         {
-          error (0, 0, _("extra operand %s"), quote (file[2]));
+          error (0, 0, _("extra operand %s"), quoteaf (file[2]));
           usage (EXIT_FAILURE);
         }
       /* Update NEW_DST and SB, which may be checked below.  */
@@ -622,7 +622,7 @@ do_copy (int n_files, char **file, const char *target_directory,
         target_directory = file[--n_files];
       else if (2 < n_files)
         error (EXIT_FAILURE, 0, _("target %s is not a directory"),
-               quote (file[n_files - 1]));
+               quoteaf (file[n_files - 1]));
     }
 
   if (target_directory)
@@ -1077,10 +1077,10 @@ main (int argc, char **argv)
               struct stat st;
               if (stat (optarg, &st) != 0)
                 error (EXIT_FAILURE, errno, _("failed to access %s"),
-                       quote (optarg));
+                       quoteaf (optarg));
               if (! S_ISDIR (st.st_mode))
                 error (EXIT_FAILURE, 0, _("target %s is not a directory"),
-                       quote (optarg));
+                       quoteaf (optarg));
             }
           target_directory = optarg;
           break;