1 files changed, 149 insertions, 0 deletions
diff --git a/build_common.sh b/build_common.sh
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+#!/bin/sh -e
+
+# The only purpose of the above shebang is to orient shellcheck right.
+# To make CI scripts maintenance simpler, copies of this file in the
+# libpcap, tcpdump and tcpslice git repositories should be identical.
+# Please mind that Solaris /bin/sh before 11 does not support the $()
+# command substitution syntax, hence the SC2006 directives.
+
+# A poor man's mktemp(1) for OSes that don't have one (e.g. AIX 7, Solaris 9).
+mktempdir_diy() {
+    while true; do
+        # /bin/sh implements $RANDOM in AIX 7, but not in Solaris before 11,
+        # thus use dd and od instead.
+        # shellcheck disable=SC2006
+        mktempdir_diy_suffix=`dd if=/dev/urandom bs=1 count=4 2>/dev/null | od -t x -A n | head -1 | tr -d '\t '`
+        [ -z "$mktempdir_diy_suffix" ] && return 1
+        mktempdir_diy_path="${TMPDIR:-/tmp}/${1:?}.${mktempdir_diy_suffix}"
+        # "test -e" would be more appropriate, but it is not available in
+        # Solaris /bin/sh before 11.
+        if [ ! -d "$mktempdir_diy_path" ]; then
+            mkdir "$mktempdir_diy_path"
+            chmod go= "$mktempdir_diy_path"
+            echo "$mktempdir_diy_path"
+            break
+        fi
+        # Try again (AIX /dev/urandom returns zeroes quite often).
+    done
+}
+
+mktempdir() {
+    mktempdir_prefix=${1:-tmp}
+    # shellcheck disable=SC2006
+    case `uname -s` in
+    Darwin|FreeBSD|NetBSD)
+        # In these operating systems mktemp(1) always appends an implicit
+        # ".XXXXXXXX" suffix to the requested template when creating a
+        # temporary directory.
+        mktemp -d -t "$mktempdir_prefix"
+        ;;
+    AIX)
+        mktempdir_diy "$mktempdir_prefix"
+        ;;
+    SunOS)
+        # shellcheck disable=SC2006
+        case `uname -r` in
+        5.10|5.11)
+            mktemp -d -t "${mktempdir_prefix}.XXXXXXXX"
+            ;;
+        *)
+            mktempdir_diy "$mktempdir_prefix"
+            ;;
+        esac
+        ;;
+    *)
+        # At least Linux and OpenBSD implementations require explicit trailing
+        # X'es in the template, so make it the same suffix as above.
+        mktemp -d -t "${mktempdir_prefix}.XXXXXXXX"
+        ;;
+    esac
+}
+
+print_sysinfo() {
+    uname -a
+    date
+}
+
+print_cc_version() {
+    # shellcheck disable=SC2006
+    case `basename "$CC"` in
+    gcc*|clang*)
+        # GCC and Clang recognize --version, print to stdout and exit with 0.
+        "$CC" --version
+        ;;
+    xl*)
+        # XL C for AIX recognizes -qversion, prints to stdout and exits with 0,
+        # but on an unknown command-line flag displays its man page and waits.
+        "$CC" -qversion
+        ;;
+    sun*)
+        # Sun compilers recognize -V, print to stderr and exit with an error.
+        "$CC" -V 2>&1 || :
+        ;;
+    *)
+        "$CC" --version || "$CC" -V || :
+        ;;
+    esac
+}
+
+increment() {
+    # No arithmetic expansion in Solaris /bin/sh before 11.
+    echo "${1:?} + 1" | bc
+}
+
+# Display text in magenta.
+echo_magenta() {
+    # ANSI magenta, the imploded text, ANSI reset, newline.
+    printf '\033[35;1m%s\033[0m\n' "$*"
+}
+
+# Run a command after displaying it.
+run_after_echo() {
+    : "${1:?}" # Require at least one argument.
+    printf '$ %s\n' "$*"
+    "$@"
+}
+
+print_so_deps() {
+    case `uname -s` in
+    Darwin)
+        run_after_echo otool -L "${1:?}"
+        ;;
+    *)
+        run_after_echo ldd "${1:?}"
+        ;;
+    esac
+}
+
+# Beware that setting MATRIX_DEBUG for tcpdump or tcpslice will produce A LOT
+# of additional output there and in any nested libpcap builds. Multiplied by
+# the matrix size, the full output log size might exceed limits of some CI
+# systems (as it had previously happened with Travis CI). Use with caution on
+# a reduced matrix.
+handle_matrix_debug() {
+    [ "$MATRIX_DEBUG" != yes ] && return
+    echo '$ cat Makefile [...]'
+    sed '/^# DO NOT DELETE THIS LINE -- mkdep uses it.$/q' <Makefile
+    run_after_echo cat config.h
+    [ "$CMAKE" = yes ] || run_after_echo cat config.log
+}
+
+purge_directory() {
+    # shellcheck disable=SC2006
+    if [ "`uname -s`" = SunOS ] && [ "`uname -r`" = 5.11 ]; then
+        # In Solaris 11 /bin/sh the pathname expansion of "*" always includes
+        # "." and "..", so the straightforward rm would always fail.
+        (
+            cd "${1:?}"
+            for pd_each in *; do
+                if [ "$pd_each" != . ] && [ "$pd_each" != .. ]; then
+                    rm -rf "$pd_each"
+                fi
+            done
+        )
+    else
+        rm -rf "${1:?}"/*
+    fi
+}
+
+# vi: set tabstop=4 softtabstop=0 expandtab shiftwidth=4 smarttab autoindent :