Re: readlink bug?

oops, C-c too fast.

basically, linklen == result, but linkbuf is incomplete, and, moreover,
is terminated with a newline(!) and a NULL (against the spec).

> * Sam Steingold <[email protected]> [2017-03-14 20:12:45 -0400]:
>
> I observe the following behavior:
>
> $ ls -l /proc/1627/fd/
> total 0
> 0 lrwx------ 1 sds sds 64 Mar 14 19:34 0 -> /dev/pts/23
> 0 l-wx------ 1 sds sds 64 Mar 14 19:34 1 -> /home/sds/src/clisp/current/build-porting64-gcc-standard_heapcodes/z
> 0 l-wx------ 1 sds sds 64 Mar 14 19:34 2 -> /home/sds/src/clisp/current/build-porting64-gcc-standard_heapcodes/z
> 0 lr-x------ 1 sds sds 64 Mar 14 19:34 3 -> /home/sds/src/clisp/current/build-porting64-gcc-standard_heapcodes/lisp.run*
> 0 l-wx------ 1 sds sds 64 Mar 14 19:34 4 -> /home/sds/src/clisp/current/build-porting64-gcc-standard_heapcodes/z
> 0 l-wx------ 1 sds sds 64 Mar 14 19:34 5 -> /home/sds/src/clisp/current/build-porting64-gcc-standard_heapcodes/z
>
> after
>
> GC_SAFE_SYSTEM_CALL(result = readlink(namestring_asciz,linkbuf,linklen));
>
> (gdb) p linkbuf
> $5 = "/home/sds/src/clisp/current/build-porting64-gcc-standard_heapcod\n"
> (gdb) p namestring_asciz
> $6 = 0x7fffffff7ff0 "/proc/1627/fd/1"
> (gdb) p fs->fs_stat
> $7 = {st_dev = 4, st_ino = 5336534, st_nlink = 1, st_mode = 41152,
> st_uid = 1001, st_gid = 1001, __pad0 = 0, st_rdev = 0, st_size = 64,
> st_blksize = 1024, st_blocks = 0, st_atim = {tv_sec = 1489534480,
> tv_nsec = 542647557}, st_mtim = {tv_sec = 1489534480, tv_nsec =
> 542647557}, st_ctim = {tv_sec = 1489534480, tv_nsec = 542647557},
> __glibc_reserved = {0, 0, 0}}

-- 
Sam Steingold (http://sds.podval.org/) on Ubuntu 16.10 (yakkety) X 11.0.11804000
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