Give a meaning to '&' in n-arg open case:

[p5sagit/p5-mst-13.2.git] / doio.c

diff --git a/doio.c b/doio.c
index 67fa665..a32604e 100644 (file)
--- a/doio.c
+++ b/doio.c
@@ -283,29 +283,39 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
                strcat(mode, "t");
 
            if (*type == '&') {
-               name = type;
              duplicity:
                dodup = 1;
-               name++;
-               if (*name == '=') {
+               type++;
+               if (*type == '=') {
                    dodup = 0;
-                   name++;
-               }
-               if (num_svs) {
-                   goto unknown_desr;
+                   type++;
                }
-               if (!*name && supplied_fp)
+               if (!num_svs && !*type && supplied_fp)
                    /* "<+&" etc. is used by typemaps */
                    fp = supplied_fp;
                else {
-                   /*SUPPRESS 530*/
-                   for (; isSPACE(*name); name++) ;
-                   if (isDIGIT(*name))
-                       fd = atoi(name);
+                   if (num_svs > 1) {
+                       Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
+                   }
+                   if (num_svs && SvIOK(*svp))
+                       fd = SvUV(*svp);
+                   else if (isDIGIT(*type)) {
+                       /*SUPPRESS 530*/
+                       for (; isSPACE(*type); type++) ;
+                       fd = atoi(type);
+                   }
                    else {
                        IO* thatio;
-                       gv = gv_fetchpv(name,FALSE,SVt_PVIO);
-                       thatio = GvIO(gv);
+                       if (num_svs) {
+                           thatio = sv_2io(*svp);
+                       }
+                       else {
+                           GV *thatgv;
+                           /*SUPPRESS 530*/
+                           for (; isSPACE(*type); type++) ;
+                           thatgv = gv_fetchpv(type,FALSE,SVt_PVIO);
+                           thatio = GvIO(thatgv);
+                       }
                        if (!thatio) {
 #ifdef EINVAL
                            SETERRNO(EINVAL,SS$_IVCHAN);
@@ -387,7 +397,6 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
                strcat(mode, "t");
 
            if (*type == '&') {
-               name = type;
                goto duplicity;
            }
            if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
@@ -431,8 +440,7 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
            if (num_svs > 1) {
                fp = PerlProc_popen_list(mode,num_svs,svp);
            }
-           else
-            {
+           else {
                fp = PerlProc_popen(name,mode);
            }
            IoTYPE(io) = IoTYPE_PIPE;
@@ -463,6 +471,18 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
            Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open");
        goto say_false;
     }
+
+    if (ckWARN(WARN_IO)) {
+       if ((IoTYPE(io) == IoTYPE_RDONLY) &&
+           (fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
+               Perl_warner(aTHX_ WARN_IO, "'std%s' opened only for input",
+                               (fp == PerlIO_stdout()) ? "out" : "err");
+       }
+       else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdout()) {
+               Perl_warner(aTHX_ WARN_IO, "'stdin' opened only for output");
+       }
+    }
+
     if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD) {
        if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) {
            (void)PerlIO_close(fp);
@@ -938,9 +958,7 @@ Perl_do_eof(pTHX_ GV *gv)
 
     if (!io)
        return TRUE;
-    else if (ckWARN(WARN_IO)
-            && (IoTYPE(io) == IoTYPE_WRONLY || IoIFP(io) == PerlIO_stdout()
-                || IoIFP(io) == PerlIO_stderr()))
+    else if (ckWARN(WARN_IO) && (IoTYPE(io) == IoTYPE_WRONLY))
     {
        /* integrate to report_evil_fh()? */
         char *name = NULL;