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sdiff(1) [osf1 man page]

sdiff(1)						      General Commands Manual							  sdiff(1)

sdiff - Compares two files and displays the differences in a side-by-side format SYNOPSIS
sdiff [-l | -s] [-w number] [-o output_file] file1 file2 The sdiff command reads file1 and file2, uses diff to compare them, and writes the results to standard output in a side-by-side format. OPTIONS
Displays only the left side when lines are identical. Creates a third file, output_file, by a controlled interactive line-by-line merging of file1 and file2. The following subcommands govern the creation of this file: Adds the left side to output_file. Adds the right side to output_file. Stops displaying identical lines. Begins displaying identical lines. Enters ed with the left side, the right side, both sides, or an empty file, respectively. Each time you exit from ed, sdiff writes the resulting edited file to the end of output_file. If you fail to save the changes before exiting, sdiff writes the initial input to output_file. Exits the interactive session. Suppresses display of identical lines. Sets the width of the output line to number (130 characters by default). DESCRIPTION
The sdiff command displays each line of the two files with a series of spaces between them if the lines are identical, a < (left angle bracket) in the field of spaces if the line only exists in file1, a > (right angle bracket) if the line only exists in file2, and a | (ver- tical bar) for lines that are different. When you specify the -o option, sdiff produces a third file by merging file1 and file2 according to your instructions. Note that the sdiff command invokes the diff -b command to compare two input files. The -b option causes the diff command to ignore trail- ing spaces, tab characters, and consider other strings of spaces as equal. EXAMPLES
To print a comparison of two files, enter: sdiff chap1.bak chap1 This displays a side-by-side listing that compares each line of chap1.bak and chap1. To display only the lines that differ, enter: sdiff -s -w 80 chap1.bak chap1 This displays the differences at the tty. The -w 80 sets page width to 80 columns. The -s option tells sdiff not to display lines that are identical in both files. To selectively combine parts of two files, enter: sdiff -s -w 80 -o chap1.combo chap1.bak chap1 This combines chap1.bak and chap1 into a new file called chap1.combo. For each group of differing lines, sdiff asks you which group to keep or whether you want to edit them using ed. SEE ALSO
Commands: diff(1), ed(1) sdiff(1)

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diffmk(1)						      General Commands Manual							 diffmk(1)

diffmk - Marks differences between files SYNOPSIS
diffmk [-b] [-ab'mark'] [-ae'mark'] [-cb'mark'] [-ce'mark'] [-db'mark'] [-de'mark'] file1 file2 The diffmk command compares two versions of a file and creates a new file that marks the differences. OPTIONS
Uses mark to mark where added lines begin. Uses mark to mark where added lines end. Ignores differences that are only changes in tabs or spaces on a line. Uses mark to mark where changed lines begin. Uses mark to mark where changed lines end. Uses mark to mark where deleted lines begin. Uses mark to mark where deleted lines end. DESCRIPTION
The file1 and file2 variables are the old and new versions of the file, respectively. The diffmk command compares them and writes a new version to standard output, which can be redirected to a file. This output contains the lines of file2 marked with nroff change mark requests (.mc), or with the marks you specify with the -ab, -ae, -cb, -ce, -db, and -de options. When output containing requests is formatted with nroff, changed or inserted lines are marked by a | (vertical bar) at the right margin of each line. An * (asterisk) indicates that a line was deleted. If the DIFFMARK environment variable is defined, it names a command string that diffmk uses to compare the files. (Normally, diffmk uses the diff command.) For example, you might set DIFFMARK to diff -h in order to better handle extremely large files. EXAMPLES
To mark the differences between two versions of a text file, enter: diffmk -ab'>I:' -ae'<I' -cb'>C' -ce'<C' -db'>D' -de'<D' chap1.old chap1 >chap1.diffs This causes diffmk to create a copy of chap1 called chap1.diffs, showing differences between chap1.old and chap1. Additions of one or more lines are marked with >I and <I, changed lines are marked with >C and <C, and deletions are marked with >D and <D. To mark differences with nroff requests, enter: diffmk chap1.old chap1 > chap1.nroff This produces a copy of chap1 called chap1.nroff containing nroff change mark requests to identify text that was added to, changed, or deleted from chap1.old. To use different nroff marking requests and ignore changes in white space, enter: diffmk -b -cb'.mc %' chap1.old chap1 > chap1.nroff This imbeds commands that mark changes with % (percent sign), additions with | (the default, because no -a option is specified), and deletions with * (the default). It does not mark changes that only involve a different number of spaces or tabs between words (-b). SEE ALSO
Commands: diff(1), nroff(1) diffmk(1)
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