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Annotation of researchv10dc/dist/man/v3/man1/if.1, revision 1.1.1.1

1.1       root        1: .pa 1
                      2: .he 'IF (I)'3/15/72'IF (I)'
                      3: .ti 0
                      4: NAME           if --  conditional command
                      5: .sp
                      6: .ti 0
                      7: SYNOPSIS       if__ expr command [ arg918 ... ]
                      8: .sp
                      9: .ti 0
                     10: DESCRIPTION    if__
                     11: evaluates the expression expr____, and if its value is true____,
                     12: executes the given command_______ with the given arguments.
                     13: 
                     14: The following primitives are used to construct
                     15: the expr____:
                     16: 
                     17: .in +9
                     18: .ti -4
                     19: -r__ file
                     20: .br
                     21: true if the file exists and is readable.
                     22: 
                     23: .ti -4
                     24: -w__ file
                     25: .br
                     26: true if the file exists and is writable
                     27: 
                     28: .ti -4
                     29: s1 =_ s2
                     30: .br
                     31: true if the strings s1__ and s2__ are equal.
                     32: 
                     33: .ti -4
                     34: s1 !=__ s2
                     35: .br
                     36: true if the strings s1__ and s2__ are not equal.
                     37: 
                     38: .in -9
                     39: These primaries may be combined with the
                     40: following operators:
                     41: 
                     42: .in +5
                     43: !_
                     44: .ti +4
                     45: unary negation operator
                     46: 
                     47: -a__
                     48: .ti +4
                     49: binary and___ operator
                     50: 
                     51: -o__
                     52: .ti +4
                     53: binary or__ operator
                     54: 
                     55: (_ expr )_
                     56: .ti +4
                     57: parentheses for grouping.
                     58: 
                     59: .in -5
                     60: -a__ has higher precedence than -o__.
                     61: Notice that all the operators and flags are separate
                     62: arguments to if__ and hence must be surrounded by spaces.
                     63: .sp
                     64: .ti 0
                     65: FILES          --
                     66: .sp
                     67: .ti 0
                     68: SEE ALSO       sh(I)
                     69: .sp
                     70: .ti 0
                     71: DIAGNOSTICS    "if error",
                     72: if the expression has the wrong syntax;
                     73: "command not found."
                     74: .sp
                     75: .ti 0
                     76: BUGS           --

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