Add a -0 option for interoperability with xargs -0.

PR:		bin/56558
Submitted by:	Eugene Grosbein <eugen@grosbein.pp.ru>
MFC after:	2 weeks

3 files changed, 14 insertions, 4 deletions

diff --git a/usr.bin/locate/locate/fastfind.c b/usr.bin/locate/locate/fastfind.c
index 8e29355..e132dbd 100644
--- a/usr.bin/locate/locate/fastfind.c
+++ b/usr.bin/locate/locate/fastfind.c
@@ -103,6 +103,7 @@ statistic (fp, path_fcodes)
 }
 #endif /* _LOCATE_STATISTIC_ */
 
+extern	char	separator;
 
 void
 #ifdef FF_MMAP
@@ -315,11 +316,11 @@ fastfind
 						else if (f_limit) {
 							counter++;
 							if (f_limit >= counter)
-								(void)puts(path);
+								(void)printf("%s%c",path,separator);
 							else 
 								errx(0, "[show only %d lines]", counter - 1);
 						} else
-							(void)puts(path);
+							(void)printf("%s%c",path,separator);
 					}
 					break;
 				}
diff --git a/usr.bin/locate/locate/locate.1 b/usr.bin/locate/locate/locate.1
index 27b750e..dca91bb 100644
--- a/usr.bin/locate/locate/locate.1
+++ b/usr.bin/locate/locate/locate.1
@@ -41,7 +41,7 @@
 .Nd find filenames quickly
 .Sh SYNOPSIS
 .Nm
-.Op Fl Scims
+.Op Fl 0Scims
 .Op Fl l Ar limit
 .Op Fl d Ar database
 .Ar pattern ...
@@ -90,6 +90,11 @@ are stored in 2 bytes.
 .Pp
 The following options are available:
 .Bl -tag -width 10n
+.It Fl 0
+Print pathnames separated by an
+.Tn ASCII NUL
+character (character code 0) instead of default NL
+(newline, character code 10).
 .It Fl S
 Print some statistic about the database and exit.
 .It Fl c
diff --git a/usr.bin/locate/locate/locate.c b/usr.bin/locate/locate/locate.c
index 9283599..a1883f2 100644
--- a/usr.bin/locate/locate/locate.c
+++ b/usr.bin/locate/locate/locate.c
@@ -112,6 +112,7 @@ int f_statistic;        /* print statistic */
 int f_silent;           /* suppress output, show only count of matches */
 int f_limit;            /* limit number of output lines, 0 == infinite */
 u_int counter;          /* counter for matches [-c] */
+char separator='\n';	/* line separator */
 
 
 void    usage(void);
@@ -145,8 +146,11 @@ main(argc, argv)
 #endif
 	(void) setlocale(LC_ALL, "");
 
-        while ((ch = getopt(argc, argv, "Scd:il:ms")) != -1)
+        while ((ch = getopt(argc, argv, "0Scd:il:ms")) != -1)
                 switch(ch) {
+                case '0':	/* 'find -print0' style */
+			separator = '\0';
+			break;
                 case 'S':	/* statistic lines */   
                         f_statistic = 1;
                         break;