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Update cmp(1) manpage to new style and do not allow both -l and -s to be set

This commit is contained in:
sin 2014-11-21 12:03:27 +00:00
parent 2b39f20675
commit 2d685482af
2 changed files with 37 additions and 26 deletions
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59
cmp.1
View File

@ -1,25 +1,36 @@
.TH CMP 1 sbase\-VERSION
.SH NAME
cmp \- compare two files
.SH SYNOPSIS
.B cmp
.RB [ \-ls ]
.RI file1
.RI file2
.SH DESCRIPTION
.B cmp
compares two files byte by byte. If the files differ, cmp prints the byte and
.Dd November 21, 2014
.Dt CMP 1 sbase\-VERSION
.Os
.Sh NAME
.Nm cmp
.Nd compare two files
.Sh SYNOPSIS
.Nm cmp
.Op Fl l | Fl s
.Ar file1 file2
.Sh DESCRIPTION
.Nm
compares two files byte by byte. If the files differ,
.Nm
prints the byte and
line number at which the difference occurred.
.P
The status code is 0 if the files are identical, and 1 if not. If an error
occurred the status code is 2.
.SH OPTIONS
.TP
.B \-l
prints the byte number, and the differing bytes (in octal), for each difference.
.TP
.B \-s
prints nothing, only returns status.
.SH SEE ALSO
.IR comm (1),
.IR diff (1)
.Pp
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl l
Prints the byte number, and the differing bytes (in octal), for each difference.
.It Fl s
Prints nothing, only returns status.
.El
.Sh EXIT STATUS
.Bl -tag -width Ds
.It 0
The files are identical.
.It 1
The files are different.
.It >1
An error occured.
.El
.Sh SEE ALSO
.Xr comm 1 ,
.Xr diff 1

4
cmp.c
View File

@ -10,7 +10,7 @@ enum { Same = 0, Diff = 1, Error = 2 };
static void
usage(void)
{
enprintf(Error, "usage: %s [-ls] file1 file2\n", argv0);
enprintf(Error, "usage: %s [-l | -s] file1 file2\n", argv0);
}
int
@ -34,7 +34,7 @@ main(int argc, char *argv[])
usage();
} ARGEND;
if (argc != 2)
if (argc != 2 || (lflag && sflag))
usage();
if (argv[0][0] == '-' && !argv[0][1])