[hackers] [sbase] Implement -E eofstr for xargs(1) || sin

[git]

commit e27c55aec3550024a66a2b8a32047b7518b2cac1
Author: sin <s...@2f30.org>
Date:   Tue Jan 7 11:53:55 2014 +0000

    Implement -E eofstr for xargs(1)

diff --git a/xargs.1 b/xargs.1
index 9313c67..c8b6669 100644
--- a/xargs.1
+++ b/xargs.1
@@ -4,8 +4,10 @@ xargs \- constuct argument list(s) and execute command
 .SH SYNOPSIS
 .B xargs
 .RB [ \-r ]
+.RB [ \-E
+.IR eofstr ]
 .RI [ cmd
-.RI [arg... ] ]
+.IR [arg... ] ]
 .SH DESCRIPTION
 xargs reads space, tab, newline and EOF delimited strings from stdin
 and executes the specified cmd with the strings as arguments.
@@ -26,6 +28,9 @@ newlines, may be escaped by a backslash.
 .BI \-r
 Do not run the command if there are no arguments.  Normally the command is
 executed at least once even if there are no arguments.
+.TP
+.B \-E eofstr
+Use eofstr as a logical EOF marker.
 .SH EXIT STATUS
 xargs exits with one of the following values:
 
diff --git a/xargs.c b/xargs.c
index 1eb9bff..b77c90f 100644
--- a/xargs.c
+++ b/xargs.c
@@ -27,12 +27,13 @@ static char *argb;
 static size_t argbsz = 1;
 static size_t argbpos;
 static int nerrors = 0;
+static char *eofstr;
 static int rflag = 0;
 
 static void
 usage(void)
 {
-       eprintf("usage: %s [-r] [cmd [arg...]]
", argv0);
+       eprintf("usage: %s [-r] [-E eofstr] [cmd [arg...]]
", argv0);
 }
 
 int
@@ -46,6 +47,9 @@ main(int argc, char *argv[])
        case 'r':
                rflag = 1;
                break;
+       case 'E':
+               eofstr = EARGF(usage());
+               break;
        default:
                usage();
        } ARGEND;
@@ -186,9 +190,8 @@ poparg(void)
        while ((ch = inputc()) != EOF) {
                switch (ch) {
                case ' ': case '        ': case '
':
-                       fillbuf('