segmentation fault if USER and LOGNAME are not in the environment

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Article #98764

#98764

From: Andrew Wilcox
Date: Mon, 08 Apr 1991 20:47

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Using Emacs version 18.56 on a Sparcstation running Sun OS 4.0.3,
Emacs dies inside of getpwnam() if neither USER or LOGNAME are defined
in the environment:

     $ unset USER
     $ unset LOGNAME
     $ emacs
     Fatal error (11).Memory fault - core dumped

The problem in appears to be in editfns.c, which does not check if
LOGNAME is not defined:

  user_name = (char *) getenv ("USER");
  if (!user_name)
    user_name = (char *) getenv ("LOGNAME"); /* USG equivalent */
  if (user_name)
    Vuser_name = build_string (user_name);
  else
    Vuser_name = Vuser_real_name;

  tem = Fstring_equal (Vuser_name, Vuser_real_name);
  if (!NULL (tem))
    pw = (struct passwd *) getpwnam (user_name);


Regards,

Andrew Wilcox
Department of Astronomy & Astrophysics, Pennsylvania State University
(andrew@astro.psu.edu)

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From: andrew@astro.psu.edu (Andrew Wilcox)
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Subject: segmentation fault if USER and LOGNAME are not in the environment
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Date: 8 Apr 91 20:47:46 GMT
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