On 17 Dec 2020, at 12:53, Konstantin Belousov <kostik...@gmail.com> wrote: > > On Thu, Dec 17, 2020 at 12:41:47PM +0000, Mateusz Piotrowski wrote: >> Author: 0mp (doc,ports committer) >> Date: Thu Dec 17 12:41:47 2020 >> New Revision: 368714 >> URL: https://svnweb.freebsd.org/changeset/base/368714 >> >> Log: >> strerror.3: Add an example for perror() >> >> This is a nice and quick reference. >> >> Reviewed by: jilles, yuripv >> MFC after: 2 weeks >> Differential Revision: https://reviews.freebsd.org/D27623 >> >> Modified: >> head/lib/libc/string/strerror.3 >> >> Modified: head/lib/libc/string/strerror.3 >> ============================================================================== >> --- head/lib/libc/string/strerror.3 Thu Dec 17 03:42:54 2020 >> (r368713) >> +++ head/lib/libc/string/strerror.3 Thu Dec 17 12:41:47 2020 >> (r368714) >> @@ -32,7 +32,7 @@ >> .\" @(#)strerror.3 8.1 (Berkeley) 6/9/93 >> .\" $FreeBSD$ >> .\" >> -.Dd December 7, 2020 >> +.Dd December 17, 2020 >> .Dt STRERROR 3 >> .Os >> .Sh NAME >> @@ -170,6 +170,31 @@ The use of these variables is deprecated; >> or >> .Fn strerror_r >> should be used instead. >> +.Sh EXAMPLES >> +The following example shows how to use >> +.Fn perror >> +to report an error. >> +.Bd -literal -offset 2n >> +#include <fcntl.h> >> +#include <stdio.h> >> +#include <stdlib.h> >> + >> +int >> +main(void) >> +{ >> + int fd; >> + >> + if ((fd = open("/nonexistent", O_RDONLY)) == -1) { >> + perror("open()"); >> + exit(1); >> + } >> + printf("File descriptor: %d\en", fd); > This lines is indented with spaces, while other lines have tabs. > >> + return (0); > return (0) is redundand.
It's not required as per the standard, but omitting it is needlessly obfuscating it and bad practice. C lets you do a whole load of things that are a bad idea, and whilst this one is harmless, it is nonetheless confusing to anyone who is not intimately acquainted quirks like this special case in the standard. Jess _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
