157 lines
4.3 KiB
Bash
157 lines
4.3 KiB
Bash
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#!/bin/sh
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# $XTermId: sinstall.sh,v 1.15 2006/01/04 02:10:27 tom Exp $
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# $XFree86: xc/programs/xterm/sinstall.sh,v 1.5 2006/01/04 02:10:27 dickey Exp $
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#
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# Install program setuid if the installer is running as root, and if xterm is
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# already installed on the system with setuid privilege. This is a safeguard
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# for ordinary users installing xterm for themselves on systems where the
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# setuid is not needed to access a PTY, but only for things like utmp.
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#
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# Options:
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# u+s, g+s as in chmod
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# -u, -g and -m as in install. If any options are given, $3 is ignored.
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#
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# Parameters:
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# $1 = program to invoke as "install"
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# $2 = program to install
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# $3 = previously-installed program, for reference
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# $4 = final installed-path, if different from reference
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trace=:
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trace=echo
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OPTS_SUID=
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OPTS_SGID=
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OPTS_MODE=
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OPTS_USR=
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OPTS_GRP=
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while test $# != 0
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do
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case $1 in
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-*)
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OPT="$1"
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shift
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if test $# != 0
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then
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case $OPT in
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-u) OPTS_USR="$1"; shift;;
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-g) OPTS_GRP="$1"; shift;;
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-m) OPTS_MODE="$1"; shift;;
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esac
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else
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break
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fi
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;;
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u+s) shift; OPTS_SUID=4000;;
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g+s) shift; OPTS_SGID=2000;;
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*) break
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;;
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esac
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done
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SINSTALL="$1"
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SRC_PROG="$2"
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REF_PROG="$3"
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DST_PROG="$4"
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test -z "$SINSTALL" && SINSTALL=install
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test -z "$SRC_PROG" && SRC_PROG=xterm
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test -z "$REF_PROG" && REF_PROG=/usr/bin/X11/xterm
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test -z "$DST_PROG" && DST_PROG="$REF_PROG"
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test -n "$OPTS_SUID" && test -n "$OPTS_USR" && REF_PROG=
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test -n "$OPTS_SGID" && test -n "$OPTS_GRP" && REF_PROG=
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echo checking for presumed installation-mode
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PROG_SUID=
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PROG_SGID=
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PROG_MODE=
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PROG_USR=
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PROG_GRP=
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if test -z "$REF_PROG" ; then
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$trace "... reference program not used"
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elif test -f "$REF_PROG" ; then
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cf_option="-l -L"
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MYTEMP=${TMPDIR-/tmp}/sinstall$$
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# Expect listing to have fields like this:
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#-r--r--r-- 1 user group 34293 Jul 18 16:29 pathname
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ls $cf_option $REF_PROG >$MYTEMP
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read cf_mode cf_links cf_usr cf_grp cf_size cf_date1 cf_date2 cf_date3 cf_rest <$MYTEMP
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$trace "... if \"$cf_rest\" is null, try the ls -g option"
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if test -z "$cf_rest" ; then
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cf_option="$cf_option -g"
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ls $cf_option $REF_PROG >$MYTEMP
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read cf_mode cf_links cf_usr cf_grp cf_size cf_date1 cf_date2 cf_date3 cf_rest <$MYTEMP
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fi
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rm -f $MYTEMP
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# If we have a pathname, and the date fields look right, assume we've
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# captured the group as well.
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$trace "... if \"$cf_rest\" is null, we do not look for group"
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if test -n "$cf_rest" ; then
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cf_test=`echo "${cf_date2}${cf_date3}" | sed -e 's/[0-9:]//g'`
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$trace "... if we have date in proper columns ($cf_date1 $cf_date2 $cf_date3), \"$cf_test\" is null"
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if test -z "$cf_test" ; then
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PROG_USR=$cf_usr;
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PROG_GRP=$cf_grp;
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fi
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fi
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$trace "... derived user \"$PROG_USR\", group \"$PROG_GRP\" of previously-installed $SRC_PROG"
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$trace "... see if mode \"$cf_mode\" has s-bit set"
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case ".$cf_mode" in #(vi
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.???s??s*) #(vi
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PROG_SUID=4000
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PROG_SGID=2000
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;;
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.???s*) #(vi
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PROG_SUID=4000
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PROG_GRP=
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;;
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.??????s*)
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PROG_SGID=2000
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PROG_USR=
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;;
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esac
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PROG_MODE=`echo ".$cf_mode" | sed -e 's/^..//' -e 's/rw./7/g' -e 's/r-./5/g' -e 's/---/0/g' -e 's/--[sxt]/1/g' -e 's/+//g'`
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fi
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# passed-in options override the reference
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test -n "$OPTS_SUID" && PROG_SUID="$OPTS_SUID"
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test -n "$OPTS_SGID" && PROG_SGID="$OPTS_SGID"
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test -n "$OPTS_MODE" && PROG_MODE="$OPTS_MODE"
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test -n "$OPTS_USR" && PROG_USR="$OPTS_USR"
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test -n "$OPTS_GRP" && PROG_GRP="$OPTS_GRP"
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# we always need a mode
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test -z "$PROG_MODE" && PROG_MODE=755
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if test -n "${PROG_USR}${PROG_GRP}" ; then
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cf_uid=`id | sed -e 's/^[^=]*=//' -e 's/(.*$//'`
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cf_usr=`id | sed -e 's/^[^(]*(//' -e 's/).*$//'`
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cf_grp=`id | sed -e 's/^.* gid=[^(]*(//' -e 's/).*$//'`
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$trace "... installing $SRC_PROG as user \"$cf_usr\", group \"$cf_grp\""
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if test "$cf_uid" != 0 ; then
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PROG_SUID=
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PROG_SGID=
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PROG_USR=""
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PROG_GRP=""
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fi
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test "$PROG_USR" = "$cf_usr" && PROG_USR=""
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test "$PROG_GRP" = "$cf_grp" && PROG_GRP=""
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fi
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test -n "${PROG_SUID}${PROG_SGID}" && PROG_MODE=`expr $PROG_MODE % 1000`
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test -n "$PROG_SUID" && PROG_MODE=`expr $PROG_SUID + $PROG_MODE`
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test -n "$PROG_SGID" && PROG_MODE=`expr $PROG_SGID + $PROG_MODE`
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test -n "$PROG_USR" && PROG_USR="-o $PROG_USR"
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test -n "$PROG_GRP" && PROG_GRP="-g $PROG_GRP"
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echo "$SINSTALL -m $PROG_MODE $PROG_USR $PROG_GRP $SRC_PROG $DST_PROG"
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eval "$SINSTALL -m $PROG_MODE $PROG_USR $PROG_GRP $SRC_PROG $DST_PROG"
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