Avoid stpncpy

It’s not worth the porting hassle, and as the glibc manual says,
“this function is generally a poor choice for processing strings”.
* admin/merge-gnulib (GNULIB_MODULES): Remove stpncpy.
* exec/configure.ac: Do not check for stpncpy.
* exec/exec.c (rpl_stpncpy, stpncpy): Remove this replacement.
(exec_0): Properly clear buffer1.  Use memcpy instead of
stpncpy to add the trailing name.  This code is clearly
still suboptimal but efficiency is not that important here
and I tried to minimize the change.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.

1 files changed, 0 insertions, 12 deletions

diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in
index 78ecb544c6e..785bdc70c5c 100644
--- a/lib/gnulib.mk.in
+++ b/lib/gnulib.mk.in
@@ -157,7 +157,6 @@
 #  stddef \
 #  stdio \
 #  stpcpy \
-#  stpncpy \
 #  strnlen \
 #  strtoimax \
 #  symlink \
@@ -336,7 +335,6 @@ GL_COND_OBJ_SIGDESCR_NP_CONDITION = @GL_COND_OBJ_SIGDESCR_NP_CONDITION@
 GL_COND_OBJ_STDIO_READ_CONDITION = @GL_COND_OBJ_STDIO_READ_CONDITION@
 GL_COND_OBJ_STDIO_WRITE_CONDITION = @GL_COND_OBJ_STDIO_WRITE_CONDITION@
 GL_COND_OBJ_STPCPY_CONDITION = @GL_COND_OBJ_STPCPY_CONDITION@
-GL_COND_OBJ_STPNCPY_CONDITION = @GL_COND_OBJ_STPNCPY_CONDITION@
 GL_COND_OBJ_STRNLEN_CONDITION = @GL_COND_OBJ_STRNLEN_CONDITION@
 GL_COND_OBJ_STRTOIMAX_CONDITION = @GL_COND_OBJ_STRTOIMAX_CONDITION@
 GL_COND_OBJ_STRTOLL_CONDITION = @GL_COND_OBJ_STRTOLL_CONDITION@
@@ -3454,16 +3452,6 @@ endif
 endif
 ## end   gnulib module stpcpy
 
-## begin gnulib module stpncpy
-ifeq (,$(OMIT_GNULIB_MODULE_stpncpy))
-
-ifneq (,$(GL_COND_OBJ_STPNCPY_CONDITION))
-libgnu_a_SOURCES += stpncpy.c
-endif
-
-endif
-## end   gnulib module stpncpy
-
 ## begin gnulib module string
 ifeq (,$(OMIT_GNULIB_MODULE_string))