[BUILTIN] Honor tab as IFS whitespace when splitting fields in readcmd

When I try to split fields by tabs, dash doesn't honour multiple tabs
between fields as whitespace (at least that's how I interpret [1],
please correct me if I'm wrong).

#!/bin/sh

# "1\t2\t\t3"
TESTSTRING="1	2		3"

# only "\t"
IFS="	"
echo "$TESTSTRING" | while read p1 p2 p3; do
	echo "p1=${p1}, p2=${p2}, p3=${p3}"
done

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 3 insertions, 6 deletions

diff --git a/src/expand.c b/src/expand.c
index 7995d40..48c45e5 100644
--- a/src/expand.c
+++ b/src/expand.c
@@ -117,9 +117,6 @@ STATIC char *evalvar(char *, int);
 STATIC size_t strtodest(const char *, const char *, int);
 STATIC void memtodest(const char *, size_t, const char *, int);
 STATIC ssize_t varvalue(char *, int, int);
-STATIC void recordregion(int, int, int);
-STATIC void removerecordregions(int); 
-STATIC void ifsbreakup(char *, struct arglist *);
 STATIC void ifsfree(void);
 STATIC void expandmeta(struct strlist *, int);
 #ifdef HAVE_GLOB
@@ -412,7 +409,7 @@ lose:
 }
 
 
-STATIC void 
+void 
 removerecordregions(int endoff)
 {
 	if (ifslastp == NULL)
@@ -1001,7 +998,7 @@ value:
  * string for IFS characters.
  */
 
-STATIC void
+void
 recordregion(int start, int end, int nulonly)
 {
 	struct ifsregion *ifsp;
@@ -1028,7 +1025,7 @@ recordregion(int start, int end, int nulonly)
  * strings to the argument list.  The regions of the string to be
  * searched for IFS characters have been stored by recordregion.
  */
-STATIC void
+void
 ifsbreakup(char *string, struct arglist *arglist)
 {
 	struct ifsregion *ifsp;