Implement 'woe' command and honor NOSUDO and PREFIX in sys/*.sh

libr/core/cmd_write.c

@@ -362,6 +362,7 @@ static int cmd_write(void *data, const char *input) {
 		switch (input[1]) {
 			case 'a':
 			case 's':
+			case 'e':
 			case 'A':
 			case 'x':
 			case 'r':
@@ -371,7 +372,10 @@ static int cmd_write(void *data, const char *input) {
 			case 'o':
 			case 'w':
 				if (input[2]!=' ') {
-					r_cons_printf ("Usage: 'wo%c 00 11 22'\n", input[1]);
+					if (input[1]=='e') r_cons_printf (
+						"Usage: 'woe from-to step'\n");
+					else r_cons_printf (
+						"Usage: 'wo%c 00 11 22'\n", input[1]);
 					return 0;
 				}
 			case '2':
@@ -393,6 +397,7 @@ static int cmd_write(void *data, const char *input) {
 						"  wox 90     ; xor cur block with 0x90\n"
 						"  wox 0x0203 ; xor cur block with 0203\n"
 						"  woa 02 03  ; add [0203][0203][...] to curblk\n"
+						"  woe 02 03  \n"
 						"Supported operations:\n"
 						"  wow  ==  write looped value (alias for 'wb')\n"
 						"  woa  +=  addition\n"

libr/core/io.c

@@ -44,12 +44,40 @@ R_API int r_core_write_op(RCore *core, const char *arg, char op) {
 	if (buf == NULL || str == NULL)
 		goto beach;
 	memcpy (buf, core->block, core->blocksize);
-	len = r_hex_str2bin (arg, (ut8 *)str);
-	if (len==-1) {
-		eprintf ("Invalid hexpair string\n");
-		goto beach;
-	}
+	if (op!='e') {
+		len = r_hex_str2bin (arg, (ut8 *)str);
+		if (len==-1) {
+			eprintf ("Invalid hexpair string\n");
+			goto beach;
+		}
+	} else len = 0;
 
+	if (op=='e') {
+		char *p, *s = strdup (arg);
+		int n, from = 0, to = 0, dif = 0, step = 1;
+		n = from = to;
+		to = UT8_MAX;
+		//
+		p = strchr (s, ' ');
+		if (p) {
+			*p = 0;
+			step = atoi (p+1);
+		}
+		p = strchr (s, '-');
+		if (p) {
+			*p = 0;
+			to = atoi (p+1);
+		}
+		if (to<1 || to>UT8_MAX) to = UT8_MAX;
+		from = atoi (s);
+		free (s);
+		dif = (to<=from)? UT8_MAX: (to-from)+1;
+		from %= (UT8_MAX+1);
+		if (dif<1) dif = UT8_MAX+1;
+		if (step<1) step = 1;
+		for (i=n=0; i<core->blocksize; i++, n+= step)
+			buf[i] = (ut8)(n%dif)+from;
+	} else
 	if (op=='2' || op=='4') {
 		op -= '0';
 		for (i=0; i<core->blocksize; i+=op) {

sys/build.sh

@@ -1,7 +1,20 @@
 #!/bin/sh
 
 MAKE_JOBS=8
-PREFIX=/usr
+[ -z "${PREFIX}" ] && PREFIX=/usr
+
+case "$1" in
+-h)
+	echo "Usage: sys/build.sh [/usr]"
+	exit 0
+	;;
+'')
+	:
+	;;
+*)
+	PREFIX="$1"
+	;;
+esac
 
 [ ! "${PREFIX}" = /usr ] && \
 	CFGARG=--with-rpath

sys/install.sh

@@ -15,5 +15,6 @@ elif [ -d .git ]; then
 fi
 
 [ "`id -u`" = 0 ] || SUDO=sudo
+[ -n "${NOSUDO}" ] && SUDO=
 
-./sys/build.sh && ${SUDO} ${MAKE} symstall
+./sys/build.sh $@ && ${SUDO} ${MAKE} symstall

sys/python.sh

@@ -4,14 +4,18 @@
 cd `dirname $PWD/$0` ; cd ..
 
 . ./sys/CONFIG
+echo =============
 cat sys/CONFIG
+echo =============
 
+[ -z "${PREFIX}" ] && PREFIX=/usr
 ID=`id -u` 
 if [ "$ID" = 0 ]; then
 	SUDO=
 else
 	SUDO=sudo
 fi
+[ -n "${NOSUDO}" ] && SUDO=
 
 export PYTHON
 export PYTHON_VERSION
@@ -22,7 +26,7 @@ echo "Using PYTHON_CONFIG ${PYTHON_CONFIG}"
 echo
 
 cd r2-bindings
-./configure --prefix=/usr --enable=python || exit 1
+./configure --prefix=${PREFIX} --enable=python || exit 1
 ${SUDO} make install-vapi || exit 1
 cd python
 make clean