Import sources from 2011-03-30 iso image

1 files changed, 93 insertions, 0 deletions

diff --git a/sys/src/ape/lib/ap/plan9/9wait.c b/sys/src/ape/lib/ap/plan9/9wait.c
new file mode 100755
index 000000000..71771df0b
--- /dev/null
+++ b/sys/src/ape/lib/ap/plan9/9wait.c
@@ -0,0 +1,93 @@
+#include "lib.h"
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "sys9.h"
+#include "dir.h"
+
+static char qsep[] = " \t\r\n";
+
+static char*
+qtoken(char *s)
+{
+	int quoting;
+	char *t;
+
+	quoting = 0;
+	t = s;	/* s is output string, t is input string */
+	while(*t!='\0' && (quoting || strchr(qsep, *t)==nil)){
+		if(*t != '\''){
+			*s++ = *t++;
+			continue;
+		}
+		/* *t is a quote */
+		if(!quoting){
+			quoting = 1;
+			t++;
+			continue;
+		}
+		/* quoting and we're on a quote */
+		if(t[1] != '\''){
+			/* end of quoted section; absorb closing quote */
+			t++;
+			quoting = 0;
+			continue;
+		}
+		/* doubled quote; fold one quote into two */
+		t++;
+		*s++ = *t++;
+	}
+	if(*s != '\0'){
+		*s = '\0';
+		if(t == s)
+			t++;
+	}
+	return t;
+}
+
+static int
+tokenize(char *s, char **args, int maxargs)
+{
+	int nargs;
+
+	for(nargs=0; nargs<maxargs; nargs++){
+		while(*s!='\0' && strchr(qsep, *s)!=nil)
+			s++;
+		if(*s == '\0')
+			break;
+		args[nargs] = s;
+		s = qtoken(s);
+	}
+
+	return nargs;
+}
+
+Waitmsg*
+_WAIT(void)
+{
+	int n, l;
+	char buf[512], *fld[5];
+	Waitmsg *w;
+
+	n = _AWAIT(buf, sizeof buf-1);
+	if(n < 0)
+		return nil;
+	buf[n] = '\0';
+	if(tokenize(buf, fld, 5) != 5){
+		strcpy(buf, "couldn't parse wait message");
+		_ERRSTR(buf, sizeof buf);
+		return nil;
+	}
+	l = strlen(fld[4])+1;
+	w = malloc(sizeof(Waitmsg)+l);
+	if(w == nil)
+		return nil;
+	w->pid = atoi(fld[0]);
+	w->time[0] = atoi(fld[1]);
+	w->time[1] = atoi(fld[2]);
+	w->time[2] = atoi(fld[3]);
+	w->msg = (char*)&w[1];
+	memmove(w->msg, fld[4], l);
+	return w;
+}
+