rpm: unmap rpm file before working with next one

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/archival/rpm.c b/archival/rpm.c
index b506f17..86ba4dc 100644 (file)
--- a/archival/rpm.c
+++ b/archival/rpm.c
@@ -305,16 +305,17 @@ int rpm_main(int argc, char **argv)
 
        while (*argv) {
                int rpm_fd;
-               unsigned offset;
+               unsigned mapsize;
                const char *source_rpm;
 
                rpm_fd = xopen(*argv++, O_RDONLY);
                G.mytags = rpm_gettags(rpm_fd, &G.tagcount);
                if (!G.mytags)
                        bb_error_msg_and_die("error reading rpm header");
-               offset = xlseek(rpm_fd, 0, SEEK_CUR);
+               mapsize = xlseek(rpm_fd, 0, SEEK_CUR);
+               mapsize = (mapsize + pagesize) & -(int)pagesize;
                /* Some NOMMU systems prefer MAP_PRIVATE over MAP_SHARED */
-               G.map = mmap(0, (offset + pagesize) & (-(int)pagesize), PROT_READ, MAP_PRIVATE, rpm_fd, 0);
+               G.map = mmap(0, mapsize, PROT_READ, MAP_PRIVATE, rpm_fd, 0);
 //FIXME: error check?
 
                source_rpm = rpm_getstr(TAG_SOURCERPM, 0);
@@ -386,6 +387,7 @@ int rpm_main(int argc, char **argv)
                                }
                        }
                }
+               munmap(G.map, mapsize);
                free(G.mytags);
                close(rpm_fd);
        }