Author: rwatson
Date: Mon Dec 14 12:19:21 2009
New Revision: 200509
URL: http://svn.freebsd.org/changeset/base/200509
Log:
Merge r197808 from head to stable/8:
In rtld's map_object(), use pread(..., 0) rather than read() to read the
ELF header from the front of the file. As all other I/O on the binary
is done using mmap(), this avoids the need for seek privileges on the
file descriptor during run-time linking.
Sponsored by: Google
Modified:
stable/8/libexec/rtld-elf/map_object.c
Directory Properties:
stable/8/libexec/rtld-elf/ (props changed)
Modified: stable/8/libexec/rtld-elf/map_object.c
==============================================================================
--- stable/8/libexec/rtld-elf/map_object.c Mon Dec 14 11:53:02 2009
(r200508)
+++ stable/8/libexec/rtld-elf/map_object.c Mon Dec 14 12:19:21 2009
(r200509)
@@ -273,7 +273,7 @@ get_elf_header (int fd, const char *path
} u;
ssize_t nbytes;
- if ((nbytes = read(fd, u.buf, PAGE_SIZE)) == -1) {
+ if ((nbytes = pread(fd, u.buf, PAGE_SIZE, 0)) == -1) {
_rtld_error("%s: read error: %s", path, strerror(errno));
return NULL;
}
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