[PATCH 1/4] main_cp.c: Unused value (CID #1255344)

[Gedare Bloom]

On Mon, Apr 5, 2021 at 1:38 PM Ryan Long <ryan.long at oarcorp.com> wrote:
>
> CID 1255344: Unused value in copy().
>
> Closes #4339
> ---
>  cpukit/libmisc/shell/main_cp.c | 64 ++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 64 insertions(+)
>
> diff --git a/cpukit/libmisc/shell/main_cp.c b/cpukit/libmisc/shell/main_cp.c
> index cddbc95..2984a50 100644
> --- a/cpukit/libmisc/shell/main_cp.c
> +++ b/cpukit/libmisc/shell/main_cp.c
> @@ -310,11 +310,31 @@ copy(rtems_shell_cp_globals* cp_globals,
>                 case FTS_ERR:
>                         warnx("%s: %s",
>                             curr->fts_path, strerror(curr->fts_errno));
> +               #if __rtems__
> +               /*
> +                * Coverity spotted that badcp is set by each loop
> +                * iteration so setting it right before continue
> +                * results in the value being unused. See CID 1255344
> +                *
> +                * The current NetBSD source (v1.62) was checked and
> +                * the same issue appears to apply although the
> +                * variable names have changed since this was imported
> +                * to RTEMS.
> +                *
> +                * This pattern exists in multiple places in this file.
> +                */
> +                       rval = 1;
> +               #else
>                         badcp = rval = 1;
> +               #endif
>                         continue;
>                 case FTS_DC:                    /* Warn, continue. */
>                         warnx("%s: directory causes a cycle", curr->fts_path);
> +               #if __rtems__
> +                       rval = 1;
> +               #else
>                         badcp = rval = 1;
> +               #endif
>                         continue;
>                 default:
>                         ;
> @@ -366,7 +386,11 @@ copy(rtems_shell_cp_globals* cp_globals,
>                         if (target_mid - to.p_path + nlen >= PATH_MAX) {
>                                 warnx("%s%s: name too long (not copied)",
>                                     to.p_path, p);
> +                       #if __rtems__
> +                               rval = 1;
> +                       #else
>                                 badcp = rval = 1;
> +                       #endif
>                                 continue;
>                         }
>                         (void)strncat(target_mid, p, nlen);
> @@ -418,7 +442,11 @@ copy(rtems_shell_cp_globals* cp_globals,
>                             to_stat.st_ino == curr->fts_statp->st_ino) {
>                                 warnx("%s and %s are identical (not copied).",
>                                     to.p_path, curr->fts_path);
> +                       #if __rtems__
> +                               rval = 1;
> +                       #else
>                                 badcp = rval = 1;
> +                       #endif
>                                 if (S_ISDIR(curr->fts_statp->st_mode))
>                                         (void)fts_set(ftsp, curr, FTS_SKIP);
>                                 continue;
> @@ -428,7 +456,11 @@ copy(rtems_shell_cp_globals* cp_globals,
>                                 warnx("cannot overwrite directory %s with "
>                                     "non-directory %s",
>                                     to.p_path, curr->fts_path);
> +                       #if __rtems__
> +                               rval = 1;
> +                       #else
>                                 badcp = rval = 1;
> +                       #endif
>                                 continue;
>                         }
>                         dne = 0;
> @@ -441,10 +473,18 @@ copy(rtems_shell_cp_globals* cp_globals,
>                             ((fts_options & FTS_COMFOLLOW) &&
>                             curr->fts_level == 0)) {
>                                 if (copy_file(cp_globals, curr, dne))
> +                               #if __rtems__
> +                                       rval = 1;
> +                               #else
>                                         badcp = rval = 1;
> +                               #endif
>                         } else {
>                                 if (copy_link(cp_globals, curr, !dne))
> +                               #if __rtems__
> +                                       rval = 1;
> +                               #else
>                                         badcp = rval = 1;
> +                               #endif
>                         }
>                         break;

This case breaks, so it is not the same. badcp should be set here, in
case vflag is enabled then a print statement is expected. the same
goes for below.

>                 case S_IFDIR:
> @@ -452,7 +492,11 @@ copy(rtems_shell_cp_globals* cp_globals,
>                                 warnx("%s is a directory (not copied).",
>                                     curr->fts_path);
>                                 (void)fts_set(ftsp, curr, FTS_SKIP);
> +                       #if __rtems__
> +                               rval = 1;
> +                       #else
>                                 badcp = rval = 1;
> +                       #endif
>                                 break;
>                         }
>                         /*
> @@ -482,10 +526,18 @@ copy(rtems_shell_cp_globals* cp_globals,
>                 case S_IFCHR:
>                         if (Rflag) {
>                                 if (copy_special(cp_globals, curr->fts_statp, !dne))
> +                               #if __rtems__
> +                                       rval = 1;
> +                               #else
>                                         badcp = rval = 1;
> +                               #endif
>                         } else {
>                                 if (copy_file(cp_globals, curr, dne))
> +                               #if __rtems__
> +                                       rval = 1;
> +                               #else
>                                         badcp = rval = 1;
> +                               #endif
>                         }
>                         break;
>                 case S_IFSOCK:
> @@ -494,15 +546,27 @@ copy(rtems_shell_cp_globals* cp_globals,
>                 case S_IFIFO:
>                         if (Rflag) {
>                                 if (copy_fifo(cp_globals, curr->fts_statp, !dne))
> +                               #if __rtems__
> +                                       rval = 1;
> +                               #else
>                                         badcp = rval = 1;
> +                               #endif
>                         } else {
>                                 if (copy_file(cp_globals, curr, dne))
> +                               #if __rtems__
> +                                       rval = 1;
> +                               #else
>                                         badcp = rval = 1;
> +                               #endif
>                         }
>                         break;
>                 default:
>                         if (copy_file(cp_globals, curr, dne))
> +                       #if __rtems__
> +                               rval = 1;
> +                       #else
>                                 badcp = rval = 1;
> +                       #endif
>                         break;
>                 }
>                 if (vflag && !badcp)
> --
> 1.8.3.1
>
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