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H A Dvar.cdiff 159632 Thu Jun 15 05:00:49 MDT 2006 stefanf Implement the PS4 variable which is defined by the POSIX User Portability
Utilities option. Its value is printed at the beginning of the line if tracing
(-x) is active. PS4 defaults to the string "+ " which is compatible with the
old behaviour to always print "+ ".

We still need to expand variables in PS1, PS2 and PS4.

PR: 46441 (part of)
Submitted by: schweikh
Obtained from: NetBSD
H A Dsh.1diff 159632 Thu Jun 15 05:00:49 MDT 2006 stefanf Implement the PS4 variable which is defined by the POSIX User Portability
Utilities option. Its value is printed at the beginning of the line if tracing
(-x) is active. PS4 defaults to the string "+ " which is compatible with the
old behaviour to always print "+ ".

We still need to expand variables in PS1, PS2 and PS4.

PR: 46441 (part of)
Submitted by: schweikh
Obtained from: NetBSD

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