ash: remove ASH_IGNORE_CR config option

No further problems with CRLF handling have been reported.  Remove
the configuration option that allowed some recent changes to be
turned off.

Also, prevent some WIN32 code from being included in the POSIX
build.  The faulty code is from commit 64c8f5f3d (ash: add support
for INT trap).

These changes don't alter the default WIN32 build.

2 files changed, 10 insertions, 29 deletions

diff --git a/shell/ash.c b/shell/ash.c
index 77670ebb4..51bf95377 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -192,16 +192,6 @@
 //config:       Enable support for the 'nocaseglob' option, which allows
 //config:       case-insensitive filename globbing.
 //config:
-//config:config ASH_IGNORE_CR
-//config:       bool "Ignore CR in CRLF line endings"
-//config:       default y
-//config:       depends on (ASH || SH_IS_ASH || BASH_IS_ASH) && PLATFORM_MINGW32
-//config:       help
-//config:       Allow CRs to be ignored when they appear in CRLF line endings
-//config:       but not in other circumstances.  This isn't a general-purpose
-//config:       option:  it only covers certain new cases which are under test.
-//config:       Enabled by default.  May be removed in future.
-//config:
 //config:endif # ash options
 
 //applet:IF_ASH(APPLET(ash, BB_DIR_BIN, BB_SUID_DROP))
@@ -6807,7 +6797,7 @@ ifsbreakup(char *string, struct arglist *arglist)
         const char *ifs, *realifs;
         int ifsspc;
         int nulonly;
-#if ENABLE_ASH_IGNORE_CR
+#if ENABLE_PLATFORM_MINGW32
         int lshift = 0;
 #endif
 
@@ -6820,13 +6810,13 @@ ifsbreakup(char *string, struct arglist *arglist)
                 do {
                         int afternul;
 
-#if ENABLE_ASH_IGNORE_CR
+#if ENABLE_PLATFORM_MINGW32
                         /* Adjust region offsets for left-shifted string. */
                         ifsp->begoff -= lshift;
                         ifsp->endoff -= lshift;
 #endif
                         p = string + ifsp->begoff;
-#if ENABLE_ASH_IGNORE_CR
+#if ENABLE_PLATFORM_MINGW32
                         if (ifsp->endoff > ifsp->begoff + 1) {
                                 /* Transform CRLF to LF.  Skip regions having zero or
                                  * one characters:  they can't contain CRLF.  If the
@@ -11788,7 +11778,7 @@ static void popstring(void)
         INT_ON;
 }
 
-#if ENABLE_ASH_IGNORE_CR
+#if ENABLE_PLATFORM_MINGW32
 /*
  * Wrapper around nonblock_immune_read() to remove CRs, but only from
  * CRLF pairs.  The tricky part is handling a CR at the end of the buffer.
@@ -11846,7 +11836,7 @@ preadfd(void)
 #if ENABLE_FEATURE_EDITING
  /* retry: */
         if (!iflag || g_parsefile->pf_fd != STDIN_FILENO)
-#if ENABLE_ASH_IGNORE_CR
+#if ENABLE_PLATFORM_MINGW32
                 nr = nonblock_immune_wrapper(g_parsefile, buf, IBUFSIZ - 1);
 #else
                 nr = nonblock_immune_read(g_parsefile->pf_fd, buf, IBUFSIZ - 1);
@@ -11932,7 +11922,7 @@ preadfd(void)
                 }
         }
 #else
-# if ENABLE_ASH_IGNORE_CR
+# if ENABLE_PLATFORM_MINGW32
         nr = nonblock_immune_wrapper(g_parsefile, buf, IBUFSIZ - 1);
 # else
         nr = nonblock_immune_read(g_parsefile->pf_fd, buf, IBUFSIZ - 1);
@@ -12007,9 +11997,7 @@ preadbuffer(void)
                 more--;
 
                 c = *q;
-                /* Remove CR from input buffer as an alternative to ASH_IGNORE_CR. */
-                if (c == '\0' || (c == '\r' &&
-                                        ENABLE_PLATFORM_MINGW32 && !ENABLE_ASH_IGNORE_CR)) {
+                if (c == '\0') {
                         memmove(q, q + 1, more);
                 } else {
                         q++;
@@ -15160,7 +15148,9 @@ trapcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  next:
                 ap++;
         }
+#if ENABLE_PLATFORM_MINGW32
         may_have_traps = trap[SIGINT] && trap[SIGINT][0] != '\0';
+#endif
         return exitcode;
 }
 
diff --git a/shell/shell_common.c b/shell/shell_common.c
index efe8828e4..716d3aebb 100644
--- a/shell/shell_common.c
+++ b/shell/shell_common.c
@@ -19,11 +19,7 @@
 #include "libbb.h"
 #include "shell_common.h"
 
-#if !ENABLE_PLATFORM_MINGW32 || ENABLE_ASH_IGNORE_CR
 const char defifsvar[] ALIGN1 = "IFS= \t\n";
-#else
-const char defifsvar[] ALIGN1 = "IFS= \t\n\r";
-#endif
 const char defoptindvar[] ALIGN1 = "OPTIND=1";
 
 /* read builtin */
@@ -261,10 +257,6 @@ shell_builtin_read(struct builtin_read_params *params)
 
                 c = buffer[bufpos];
 #if ENABLE_PLATFORM_MINGW32
-# if !ENABLE_ASH_IGNORE_CR
-                if (c == '\r')
-                        continue;
-# else
                 if (c == '\n') {
                         if (backslash == 2 || (bufpos > 0 && buffer[bufpos - 1] == '\r')) {
                                 /* We saw either:
@@ -279,11 +271,10 @@ shell_builtin_read(struct builtin_read_params *params)
                          * process ?? */
                         backslash = 0;
                 }
-# endif
 #endif
                 if (!(read_flags & BUILTIN_READ_RAW)) {
                         if (backslash) {
-#if ENABLE_ASH_IGNORE_CR
+#if ENABLE_PLATFORM_MINGW32
                                 if (c == '\r') {
                                         /* We have BS CR, keep CR for now, might see LF next */
                                         backslash = 2;