GNU bug report logs - #34180
27.0.50; argv[0] used incorrectly to find the .pdmp

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.0.50; argv[0] used incorrectly to find the .pdmp
Date: Wed, 23 Jan 2019 11:07:51 -0500

Package: Emacs
Version: 27.0.50


Currently, the first .pdmp file that we try to load is found by adding
".pdmp" to argv[0].
This has 2 problems:

1- It fails miserably if argv[0] is a name relative to $PATH since it
   performs the lookup relative to $PWD instead, which is additionally
   a security issue.

2- If the executable named by argv[0] is a symlink, it does not try to
   follow the symlink in case the .pdmp is stored next to the
   destination rather than next to the source.
   

-- Stefan



In GNU Emacs 27.0.50 (build 1, x86_64-unknown-linux-gnu, GTK+ Version 3.24.3)
 of 2019-01-22 built on alfajor
Repository revision: 4e56ca18c9760d9a9429d71e36bedfe4da879a9c
Repository branch: work
Windowing system distributor 'The X.Org Foundation', version 11.0.12003000
System Description: Debian GNU/Linux buster/sid

Recent messages:
Mark set
Auto-saving...done
Saving file /home/monnier/src/emacs/trunk/src/emacs.c...
Wrote /home/monnier/src/emacs/trunk/src/emacs.c
Saving file /home/monnier/src/emacs/trunk/ChangeLog...
Wrote /home/monnier/src/emacs/trunk/ChangeLog
Mark set
Press C-c C-c when you are done editing.
Enter a change comment.  Type C-c C-c when done
Checking in /home/monnier/src/emacs/trunk/src/emacs.c...done

Configured using:
 'configure -C --enable-checking --with-modules --enable-check-lisp-object-type
 'CFLAGS=-Wall -g3 -Og -Wno-pointer-sign'
 PKG_CONFIG_PATH=/home/monnier/lib/pkgconfig'

Configured features:
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NOTIFY INOTIFY GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
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GMP

Important settings:
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  locale-coding-system: utf-8-unix

Major mode: InactiveMinibuffer

Minor modes in effect:
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  shell-dirtrack-mode: t
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  electric-pair-mode: t
  global-reveal-mode: t
  reveal-mode: t
  auto-insert-mode: t
  savehist-mode: t
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  url-handler-mode: t
  global-eldoc-mode: t
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  menu-bar-mode: t
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  global-font-lock-mode: t
  line-number-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
/home/monnier/src/emacs/elpa/packages/svg/svg hides /home/monnier/src/emacs/work/lisp/svg
/home/monnier/src/emacs/elpa/packages/ada-mode/ada-mode hides /home/monnier/src/emacs/work/lisp/progmodes/ada-mode
/home/monnier/src/emacs/elpa/packages/ada-mode/ada-stmt hides /home/monnier/src/emacs/work/lisp/progmodes/ada-stmt
/home/monnier/src/emacs/elpa/packages/ada-mode/ada-prj hides /home/monnier/src/emacs/work/lisp/progmodes/ada-prj
/home/monnier/src/emacs/elpa/packages/ada-mode/ada-xref hides /home/monnier/src/emacs/work/lisp/progmodes/ada-xref
/home/monnier/src/emacs/elpa/packages/nadvice/nadvice hides /home/monnier/src/emacs/work/lisp/emacs-lisp/nadvice
/home/monnier/src/emacs/elpa/packages/hyperbole/set hides /home/monnier/src/emacs/work/lisp/emacs-lisp/set
/home/monnier/src/emacs/elpa/packages/landmark/landmark hides /home/monnier/src/emacs/work/lisp/obsolete/landmark
/home/monnier/src/emacs/elpa/packages/crisp/crisp hides /home/monnier/src/emacs/work/lisp/obsolete/crisp

Features:
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rfc2231 rfc2047 rfc2045 mm-util ietf-drums mail-prsvr mailabbrev
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disp-table compact-docstrings cl-seq inline kotl-autoloads proof-site
proof-autoloads realgud-recursive-autoloads finder-inf url-auth info
package easymenu epg-config url-handlers url-parse auth-source eieio
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Memory information:
((conses 8 239985 30547)
 (symbols 24 18919 0) (strings 16 72751 4613) (string-bytes 1 2323909)
 (vectors 8 43743)
 (vector-slots 4 1324674 45672) (floats 8 584 263) (intervals 28 6233 0)
 (buffers 528 39))

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