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Commit9e70e65

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pg_ctl: Disable autoruns for cmd.exe on Windows
On Windows, cmd.exe is used to launch the postmaster process to ease itsredirection setup. However, cmd.exe may execute other programs atstartup due to autorun configurations, which could influence thepostmaster startup. This patch adds /D flag to the launcher cmd.execommand line to disable autorun settings written in the registry.This was originally applied on HEAD as of9886744 without abackpatch, but the patch has survived CI and buildfarm cycles. I havechecked that cmd /d exists down to Windows XP, which should make thischange work correctly in the oldest branches still supported.Reported-by: Hayato KurodaAuthor: Kyotaro HoriguchiReviewed-by: Robert Haas, Michael PaquierDiscussion:https://postgr.es/m/20230922.161551.320043332510268554.horikyota.ntt@gmail.comBackpatch-through: 12
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‎src/bin/pg_ctl/pg_ctl.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -559,11 +559,11 @@ start_postmaster(void)
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else
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close(fd);
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562-
cmd=psprintf("CMD /C \"\"%s\" %s%s < \"%s\" >> \"%s\" 2>&1\"",
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cmd=psprintf("CMD /D /C \"\"%s\" %s%s < \"%s\" >> \"%s\" 2>&1\"",
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exec_path,pgdata_opt,post_opts,DEVNULL,log_file);
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}
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else
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cmd=psprintf("CMD /C \"\"%s\" %s%s < \"%s\" 2>&1\"",
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cmd=psprintf("CMD /D /C \"\"%s\" %s%s < \"%s\" 2>&1\"",
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exec_path,pgdata_opt,post_opts,DEVNULL);
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if (!CreateRestrictedProcess(cmd,&pi, false))

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