X-Git-Url: https://git.gag.com/?a=blobdiff_plain;ds=sidebyside;f=tests%2Finit.sh;h=a886daa3e1e99bd7a37dee7d43299f34e48c17ff;hb=3d2df61b0ca3aa4efd9258905402dc2a2c73c14c;hp=0da6c1e328a9e705add03847b592458eee62c4b0;hpb=dc9369793648fe7d17d45239c00c97f2d80bc3de;p=debian%2Fgzip

diff --git a/tests/init.sh b/tests/init.sh
index 0da6c1e..a886daa 100644
--- a/tests/init.sh
+++ b/tests/init.sh
@@ -1,6 +1,6 @@
 # source this file; set up for tests
 
-# Copyright (C) 2009-2011 Free Software Foundation, Inc.
+# Copyright (C) 2009-2015 Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -61,7 +61,7 @@ ME_=`expr "./$0" : '.*/\(.*\)$'`
 
 # We use a trap below for cleanup.  This requires us to go through
 # hoops to get the right exit status transported through the handler.
-# So use `Exit STATUS' instead of `exit STATUS' inside of the tests.
+# So use 'Exit STATUS' instead of 'exit STATUS' inside of the tests.
 # Turn off errexit here so that we don't trip the bug with OSF1/Tru64
 # sh inside this function.
 Exit () { set +e; (exit $1); exit $1; }
@@ -74,7 +74,20 @@ Exit () { set +e; (exit $1); exit $1; }
 # the reason for skip/failure to console, rather than to the .log files.
 : ${stderr_fileno_=2}
 
-warn_ () { echo "$@" 1>&$stderr_fileno_; }
+# Note that correct expansion of "$*" depends on IFS starting with ' '.
+# Always write the full diagnostic to stderr.
+# When stderr_fileno_ is not 2, also emit the first line of the
+# diagnostic to that file descriptor.
+warn_ ()
+{
+  # If IFS does not start with ' ', set it and emit the warning in a subshell.
+  case $IFS in
+    ' '*) printf '%s\n' "$*" >&2
+          test $stderr_fileno_ = 2 \
+            || { printf '%s\n' "$*" | sed 1q >&$stderr_fileno_ ; } ;;
+    *) (IFS=' '; warn_ "$@");;
+  esac
+}
 fail_ () { warn_ "$ME_: failed test: $@"; Exit 1; }
 skip_ () { warn_ "$ME_: skipped test: $@"; Exit 77; }
 fatal_ () { warn_ "$ME_: hard error: $@"; Exit 99; }
@@ -159,7 +172,7 @@ else
     if test "$re_shell_" = __current__; then
       # 'eval'ing this code makes Solaris 10's /bin/sh exit with
       # $? set to 2.  It does not evaluate any of the code after the
-      # "unexpected" first `('.  Thus, we must run it in a subshell.
+      # "unexpected" first '('.  Thus, we must run it in a subshell.
       ( eval "$gl_shell_test_script_" ) > /dev/null 2>&1
     else
       "$re_shell_" -c "$gl_shell_test_script_" 2>/dev/null
@@ -194,6 +207,14 @@ else
   fi
 fi
 
+# If this is bash, turn off all aliases.
+test -n "$BASH_VERSION" && unalias -a
+
+# Note that when supporting $EXEEXT (transparently mapping from PROG_NAME to
+# PROG_NAME.exe), we want to support hyphen-containing names like test-acos.
+# That is part of the shell-selection test above.  Why use aliases rather
+# than functions?  Because support for hyphen-containing aliases is more
+# widespread than that for hyphen-containing function names.
 test -n "$EXEEXT" && shopt -s expand_aliases
 
 # Enable glibc's malloc-perturbing option.
@@ -208,14 +229,105 @@ export MALLOC_PERTURB_
 # a partition, or to undo any other global state changes.
 cleanup_ () { :; }
 
-if ( diff --version < /dev/null 2>&1 | grep GNU ) > /dev/null 2>&1; then
-  compare () { diff -u "$@"; }
+# Emit a header similar to that from diff -u;  Print the simulated "diff"
+# command so that the order of arguments is clear.  Don't bother with @@ lines.
+emit_diff_u_header_ ()
+{
+  printf '%s\n' "diff -u $*" \
+    "--- $1	1970-01-01" \
+    "+++ $2	1970-01-01"
+}
+
+# Arrange not to let diff or cmp operate on /dev/null,
+# since on some systems (at least OSF/1 5.1), that doesn't work.
+# When there are not two arguments, or no argument is /dev/null, return 2.
+# When one argument is /dev/null and the other is not empty,
+# cat the nonempty file to stderr and return 1.
+# Otherwise, return 0.
+compare_dev_null_ ()
+{
+  test $# = 2 || return 2
+
+  if test "x$1" = x/dev/null; then
+    test -s "$2" || return 0
+    emit_diff_u_header_ "$@"; sed 's/^/+/' "$2"
+    return 1
+  fi
+
+  if test "x$2" = x/dev/null; then
+    test -s "$1" || return 0
+    emit_diff_u_header_ "$@"; sed 's/^/-/' "$1"
+    return 1
+  fi
+
+  return 2
+}
+
+if diff_out_=`exec 2>/dev/null; diff -u "$0" "$0" < /dev/null` \
+   && diff -u Makefile "$0" 2>/dev/null | grep '^[+]#!' >/dev/null; then
+  # diff accepts the -u option and does not (like AIX 7 'diff') produce an
+  # extra space on column 1 of every content line.
+  if test -z "$diff_out_"; then
+    compare_ () { diff -u "$@"; }
+  else
+    compare_ ()
+    {
+      if diff -u "$@" > diff.out; then
+        # No differences were found, but Solaris 'diff' produces output
+        # "No differences encountered". Hide this output.
+        rm -f diff.out
+        true
+      else
+        cat diff.out
+        rm -f diff.out
+        false
+      fi
+    }
+  fi
+elif diff_out_=`exec 2>/dev/null; diff -c "$0" "$0" < /dev/null`; then
+  if test -z "$diff_out_"; then
+    compare_ () { diff -c "$@"; }
+  else
+    compare_ ()
+    {
+      if diff -c "$@" > diff.out; then
+        # No differences were found, but AIX and HP-UX 'diff' produce output
+        # "No differences encountered" or "There are no differences between the
+        # files.". Hide this output.
+        rm -f diff.out
+        true
+      else
+        cat diff.out
+        rm -f diff.out
+        false
+      fi
+    }
+  fi
 elif ( cmp --version < /dev/null 2>&1 | grep GNU ) > /dev/null 2>&1; then
-  compare () { cmp -s "$@"; }
+  compare_ () { cmp -s "$@"; }
 else
-  compare () { cmp "$@"; }
+  compare_ () { cmp "$@"; }
 fi
 
+# Usage: compare EXPECTED ACTUAL
+#
+# Given compare_dev_null_'s preprocessing, defer to compare_ if 2 or more.
+# Otherwise, propagate $? to caller: any diffs have already been printed.
+compare ()
+{
+  # This looks like it can be factored to use a simple "case $?"
+  # after unchecked compare_dev_null_ invocation, but that would
+  # fail in a "set -e" environment.
+  if compare_dev_null_ "$@"; then
+    return 0
+  else
+    case $? in
+      1) return 1;;
+      *) compare_ "$@";;
+    esac
+  fi
+}
+
 # An arbitrary prefix to help distinguish test directories.
 testdir_prefix_ () { printf gt; }
 
@@ -299,8 +411,7 @@ path_prepend_ ()
     case $path_dir_ in
       '') fail_ "invalid path dir: '$1'";;
       /*) abs_path_dir_=$path_dir_;;
-      *) abs_path_dir_=`cd "$initial_cwd_/$path_dir_" && echo "$PWD"` \
-           || fail_ "invalid path dir: $path_dir_";;
+      *) abs_path_dir_=$initial_cwd_/$path_dir_;;
     esac
     case $abs_path_dir_ in
       *:*) fail_ "invalid path dir: '$abs_path_dir_'";;
@@ -336,7 +447,7 @@ setup_ ()
   pfx_=`testdir_prefix_`
   test_dir_=`mktempd_ "$initial_cwd_" "$pfx_-$ME_.XXXX"` \
     || fail_ "failed to create temporary directory in $initial_cwd_"
-  cd "$test_dir_"
+  cd "$test_dir_" || fail_ "failed to cd to temporary directory"
 
   # As autoconf-generated configure scripts do, ensure that IFS
   # is defined initially, so that saving and restoring $IFS works.
@@ -426,7 +537,7 @@ mktempd_ ()
   esac
 
   # First, try to use mktemp.
-  d=`unset TMPDIR; mktemp -d -t -p "$destdir_" "$template_" 2>/dev/null` \
+  d=`unset TMPDIR; { mktemp -d -t -p "$destdir_" "$template_"; } 2>/dev/null` \
     || fail=1
 
   # The resulting name must be in the specified directory.