Path + Return code (niklasb#27)

* Change a message with the right path

Indeed, the script is position independant, thus `./db` is not always
the path to the db.

* Add return codes

It allows automatic tests and, if everything is find, to reproduce 22ad329

common/libc.sh

@@ -75,7 +75,7 @@ index_libc() {
 check_id() {
   local id=$1
   if [[ -e db/${id}.info ]]; then
-    echo "  -> Already have this version, 'rm db/${id}.*' to force"
+    echo "  -> Already have this version, 'rm ${PWD}/db/${id}.*' to force"
     return 1
   fi
   return 0
@@ -119,6 +119,7 @@ get_all_debian() {
   for f in `wget $url/ -O - 2>/dev/null | grep -Eoh 'libc6(-i386|-amd64)?_[^"]*(amd64|i386)\.deb' |grep -v "</a>"`; do
     get_debian $url/$f $1
   done
+  return 0
 }
 
 requirements_debian() {

dump

@@ -1,5 +1,6 @@
 #!/bin/bash
 cd "$(dirname "$0")"
+. common/libc.sh
 if [[ $# < 1 ]]; then
   echo >&2 "Usage: $0 id [name1 [name2 ...]]"
   exit 2
@@ -11,7 +12,9 @@ if [[ $# == 0 ]]; then
 else
   names="$@"
 fi
+ls -1 "db/${id}."* >/dev/null 2>&1 || die "Invalid ID '$id'"
 for name in $names; do
   offset=`cat db/${id}.symbols | grep "^$name " | cut -d' ' -f2`
+  [ -z "$offset" ] && die "Invalid symbol '$name'"
   echo "offset_${name} = 0x${offset}"
 done

find

@@ -27,6 +27,9 @@ function find() {
   fi
 }
 
+ret=1
 for id in `find "$@"`; do
   echo "`cat db/${id}.info` ($id)"
+  ret=0
 done
+exit $ret

identify

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -o pipefail
 cd "$(dirname "$0")"
 help() {
   echo >&2 "Usage: $0 path/to/libc.so"