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Diffstat (limited to 'man/1/sh')
| -rw-r--r-- | man/1/sh | 29 |
1 files changed, 29 insertions, 0 deletions
@@ -301,6 +301,29 @@ The operator is invoked and its value substituted. See .IR "Built-in Commands" , below, for more information on builtins. +.HP +.BI <{ command } +.HP +.BI >{ command } +.br +The +.I command +is executed asynchronously with its standard output or standard input +connected to a pipe. +The value of the argument is the name of a file +referring to the other end of the pipe. +This allows the construction of +non-linear pipelines. +For example, the following runs two commands +.B old +and +.B new +and uses +.B cmp +to compare their outputs +.EX + cmp <{old} <{new} +.EE .PD .SS Free Carets In most circumstances, @@ -394,6 +417,12 @@ may be redirected from a file by the sequence or by the sequence .BI <> file \f1, which opens the file for writing as well as reading. +Note that if +.I file +is in fact a parsed braced block, the redirection will be treated as +pipe to the given command - it is identical to the +.B "<{}" +operator mentioned above. .PP Redirections may be applied to a file-descriptor other than standard input or output by qualifying the redirection operator |