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pg_ctl: Disable autoruns for cmd.exe on Windows

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On Windows, cmd.exe is used to launch the postmaster process to ease its
redirection setup.  However, cmd.exe may execute other programs at
startup due to autorun configurations, which could influence the
postmaster startup.  This patch adds /D flag to the launcher cmd.exe
command line to disable autorun settings written in the registry.

This was originally applied on HEAD as of 9886744a361b without a
backpatch, but the patch has survived CI and buildfarm cycles.  I have
checked that cmd /d exists down to Windows XP, which should make this
change work correctly in the oldest branches still supported.

Reported-by: Hayato Kuroda
Author: Kyotaro Horiguchi
Reviewed-by: Robert Haas, Michael Paquier
Discussion: https://postgr.es/m/20230922.161551.320043332510268554.horikyota.ntt@gmail.com
Backpatch-through: 12
This commit is contained in:
Michael Paquier 2024-01-12 13:53:13 +09:00
parent bfd28bb07a
commit c8aab699ed
1 changed files with 2 additions and 2 deletions
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4
src/bin/pg_ctl/pg_ctl.c
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@ -559,11 +559,11 @@ start_postmaster(void)
else
close(fd);
cmd = psprintf("\"%s\" /C \"\"%s\" %s%s < \"%s\" >> \"%s\" 2>&1\"",
cmd = psprintf("\"%s\" /D /C \"\"%s\" %s%s < \"%s\" >> \"%s\" 2>&1\"",
comspec, exec_path, pgdata_opt, post_opts, DEVNULL, log_file);
}
else
cmd = psprintf("\"%s\" /C \"\"%s\" %s%s < \"%s\" 2>&1\"",
cmd = psprintf("\"%s\" /D /C \"\"%s\" %s%s < \"%s\" 2>&1\"",
comspec, exec_path, pgdata_opt, post_opts, DEVNULL);
if (!CreateRestrictedProcess(cmd, &pi, false))