Re: [PATCH 7/9] add a gpg_path value for notmuch_database_t

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+From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>\r
+To: Tomi Ollila <tomi.ollila@iki.fi>, Notmuch Mail <notmuch@notmuchmail.org>\r
+Subject: Re: [PATCH 7/9] add a gpg_path value for notmuch_database_t\r
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+\r
+On Fri 2015-12-11 17:02:33 -0500, Tomi Ollila wrote:\r
+> The above code finds gpg/gpg2 (when called w/ these args) from\r
+> _CS_PATH (seems to be /bin:/usr/bin by default in linux (tried to\r
+> look how this set in *BSD -- initially it looks like /usr/local/bin\r
+> not included but... maybe we let them to complain if this is the case\r
+> ... :/)\r
+> ... anyway, the full found path is not set anywhere -- how is it found\r
+> when used (exec*p() using $PATH? :O)\r
+\r
+Hm, according to exec(3):\r
+\r
+   Special semantics for execlp() and execvp()\r
+       The execlp(), execvp(), and execvpe() functions duplicate the\r
+       actions of the shell in searching for an executable file if the\r
+       specified filename does not contain a slash (/) character.  The\r
+       file is sought in the colon-separated list of directory pathnames\r
+       specified in the PATH environment variable.  If this variable\r
+       isn't defined, the path list defaults to the current directory\r
+       followed by the list of directories returned by\r
+       confstr(_CS_PATH).  (This confstr(3) call typically returns the\r
+       value "/bin:/usr/bin".)\r
+\r
+So this code probably also ought to be searching $PATH as well.  yuck.\r
+You'd think there would be a commonly-available function for doing this\r
+specific check without having to actually try to exec() something.\r
+\r
+         --dkg\r