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authorPaul Eggert <eggert@cs.ucla.edu>2012-05-09 23:53:16 -0700
committerJim Meyering <meyering@redhat.com>2012-05-10 11:02:42 +0200
commit9d308df13271a852aee7d46c65432fa84145ea31 (patch)
tree4973d91ba1d10e86875e8c2be8079dca131dad85 /scripts
parent2c436decf8bc57a9173c940a26c80358d499e1b6 (diff)
downloadcoreutils-9d308df13271a852aee7d46c65432fa84145ea31.tar.xz
maint: handle file sizes more reliably
Problem reported by Samuel Thibault in <http://bugs.gnu.org/11424>. * NEWS: Document this. * src/dd.c (skip): Handle skipping past EOF on shared or typed memory objects the same way as with regular files. (dd_copy): It's OK to truncate shared memory objects. * src/du.c (duinfo_add): Check for overflow. (print_only_size): Report overflow. (process_file): Ignore negative file sizes in the --apparent-size case. * src/od.c (skip): Fix comment about st_size. * src/split.c (main): * src/truncate.c (do_ftruncate, main): On files where st_size is not portable, fall back on using lseek with SEEK_END to determine the size. Although strictly speaking POSIX says the behavior is implementation-defined, in practice if lseek returns a nonnegative value it's a reasonable one to use for the file size. * src/system.h (usable_st_size): Symlinks have reliable st_size too. * tests/misc/truncate-dir-fail: Don't assume that getting the size of a dir is not allowed, as it's now allowed on many platforms, e.g., GNU/Linux.
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