On Thu, May 29, 2014 at 07:46:35PM +0530, zubin.mit...@gmail.com wrote:
> From: Zubin Mithra <zubin.mit...@gmail.com>
>
> * util.c (print_abspath): New function that converts
> a relative to an absolute path.
> * util.c (get_tracee_cwd): New function that finds
> the current working directory of the tracee.
> * (printpathn): Use print_abspath to print out links
> if `-yy` flag is used.
>
> Signed-off-by: Zubin Mithra <zubin.mit...@gmail.com>
> ---
> defs.h | 2 ++
> util.c | 71
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
> 2 files changed, 70 insertions(+), 3 deletions(-)
>
> diff --git a/defs.h b/defs.h
> index 5381e60..25d845d 100644
> --- a/defs.h
> +++ b/defs.h
> @@ -631,6 +631,8 @@ extern const char *signame(int);
> extern void pathtrace_select(const char *);
> extern int pathtrace_match(struct tcb *);
> extern int getfdpath(struct tcb *, int, char *, unsigned);
> +extern int get_tracee_cwd(struct tcb *, char *);
> +extern bool print_abspath(struct tcb *, char *, int);
>
> extern const char *xlookup(const struct xlat *, int);
>
> diff --git a/util.c b/util.c
> index b1f1e90..68af3ae 100644
> --- a/util.c
> +++ b/util.c
> @@ -593,9 +593,17 @@ printpathn(struct tcb *tcp, long addr, int n)
> n++;
> outstr = alloca(4 * n); /* 4*(n-1) + 3 for quotes and NUL */
> string_quote(path, outstr, -1, n);
> - tprints(outstr);
> - if (!nul_seen)
> - tprints("...");
> + if (show_fd_path == 2) {
> + /* "..." is printed if the length of current working
> + directory + length of outstr > 4096 */
> + if (print_abspath(tcp, outstr, nul_seen))
> + tprints("...");
> + }
> + else {
> + tprints(outstr);
> + if (!nul_seen)
> + tprints("...");
> + }In this way only the original path will be string_quote'ed, and cwd will be left intact (try your code with strace -xx). What I suggest is simply to fetch cwd prefix, string_quote and print it right before the current outstr related code in printpathn. -- ldv
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