| POSIX (1591) | POSIX (168386) |
|---|---|
| 1# @(#)POSIX 8.1 (Berkeley) 6/6/93 | 1# @(#)POSIX 8.1 (Berkeley) 6/6/93 |
| 2# $FreeBSD: head/usr.bin/sed/POSIX 168386 2007-04-05 13:31:17Z yar $ |
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| 2 3Comments on the IEEE P1003.2 Draft 12 4 Part 2: Shell and Utilities 5 Section 4.55: sed - Stream editor 6 7Diomidis Spinellis <dds@doc.ic.ac.uk> 8Keith Bostic <bostic@cs.berkeley.edu> 9 --- 102 unchanged lines hidden (view full) --- 112 'c' command is triggered at the third line, i.e. will the text 113 be output even though line 3 of the input will never logically 114 encounter that command. 115 116 2,4b 117 1,3c\ 118 text 119 | 3 4Comments on the IEEE P1003.2 Draft 12 5 Part 2: Shell and Utilities 6 Section 4.55: sed - Stream editor 7 8Diomidis Spinellis <dds@doc.ic.ac.uk> 9Keith Bostic <bostic@cs.berkeley.edu> 10 --- 102 unchanged lines hidden (view full) --- 113 'c' command is triggered at the third line, i.e. will the text 114 be output even though line 3 of the input will never logically 115 encounter that command. 116 117 2,4b 118 1,3c\ 119 text 120 |
| 120 Historic implementations, and this implementation, do not output 121 the text in the above example. The general rule, therefore, 122 is that a range whose second address is never matched extends to 123 the end of the input. | 121 Historic implementations did not output the text in the above 122 example. Therefore it was believed that a range whose second 123 address was never matched extended to the end of the input. 124 However, the current practice adopted by this implementation, 125 as well as by those from GNU and SUN, is as follows: The text 126 from the 'c' command still isn't output because the second address 127 isn't actually matched; but the range is reset after all. In the 128 above example, only the first line of the input will be deleted. |
| 124 12513. Historical implementations allow an output suppressing #n at the 126 beginning of -e arguments as well as in a script file. POSIX 127 does not specify this. This implementation follows historical 128 practice. 129 13014. POSIX does not explicitly specify how sed behaves if no script is 131 specified. Since the sed Synopsis permits this form of the command, --- 67 unchanged lines hidden --- | 129 13013. Historical implementations allow an output suppressing #n at the 131 beginning of -e arguments as well as in a script file. POSIX 132 does not specify this. This implementation follows historical 133 practice. 134 13514. POSIX does not explicitly specify how sed behaves if no script is 136 specified. Since the sed Synopsis permits this form of the command, --- 67 unchanged lines hidden --- |