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never use /var/folders for TMPDIR on darwin

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This doesn't just cause problems for nix-store --serve but also results
in certain build failures. Builds that use unix domain sockets in their
tests often fail because the /var/folders prefix already consumes more
than half of the maximum length of socket paths.

    struct sockaddr_un {
       sa_family_t sun_family;               /* AF_UNIX */
       char        sun_path[108];            /* Pathname */
    };
This commit is contained in:
Daiderd Jordan 2020-04-12 09:57:22 +02:00
parent ea2148f47c
commit 4d9db420ff
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1 changed files with 1 additions and 1 deletions
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2
src/libmain/shared.cc
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@ -155,7 +155,7 @@ void initNix()
sshd). This breaks build users because they don't have access
to the TMPDIR, in particular in ‘nix-store --serve’. */
#if __APPLE__
if (getuid() == 0 && hasPrefix(getEnv("TMPDIR").value_or("/tmp"), "/var/folders/"))
if (hasPrefix(getEnv("TMPDIR").value_or("/tmp"), "/var/folders/"))
unsetenv("TMPDIR");
#endif
}