add directory study

study/linux-travel/MINIX-1.5/1.5/Source/amoeba/util/from.c

@@ -0,0 +1,79 @@
+#include <stdio.h>
+#include <signal.h>
+#include "amoeba.h"
+
+#define BUFSIZE		20480
+
+char *	cmd;
+
+
+catchalarm()
+{
+	fprintf(stderr, "%s: timeout\n", cmd);
+	exit(1);
+}
+
+
+main(argc, argv)
+int	argc;
+char **	argv;
+{
+	unshort		getreq();
+	unshort		putrep();
+	char *		malloc();
+	int		catchalarm();
+
+	char *		buf;
+	header		hdr;
+	unshort		cnt;
+	unshort		bufsize = BUFSIZE;
+	unsigned	tim = 15 * 60;		/* #secs before timeout */
+
+	cmd = *argv;
+	if (argc > 1 && strncmp(argv[1], "-t", 2) == 0)
+	{
+		tim = atoi(&argv[1][2]);
+		argc--;
+		argv++;
+	}
+	if (tim)
+		signal(SIGALRM, catchalarm);
+	if (argc != 2 && argc != 3)	/* if (!(argc & 2))?? */
+	{
+		fprintf(stderr, "Usage: %s [-ttime] [bufsize] port\n", cmd);
+		exit(-1);
+	}
+	if (argc == 3)
+		bufsize = atoi(argv[2]);
+	if ((buf = malloc(bufsize * sizeof (char))) == NULL)
+	{
+		fprintf(stderr, "%s: out of memory\n", cmd);
+		exit(-1);
+	}
+	strncpy(&hdr.h_port, argv[1], PORTSIZE);
+	for (;;)
+	{
+		if (tim)
+			alarm(tim);
+		cnt = getreq(&hdr, buf, bufsize);
+		if (tim)
+			alarm(0);
+		if ((short)cnt < 0)
+		{
+			fprintf(stderr, "%s: getreq failed\n", cmd);
+			exit(-3);
+		}
+		hdr.h_status = 0;
+		if (cnt != 0)
+			if (write(1, buf, cnt) < 0)
+			{
+				perror(cmd);
+				hdr.h_status = -1;
+			}
+		putrep(&hdr, NILBUF, 0);
+		if (hdr.h_status)
+			exit(-4);
+		if (cnt == 0)
+			exit(0);
+	}
+}