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WebSVN – planix.SVN – Blame – /os/branches/feature_fixcpp/sys/src/cmd/tee.c – Rev 2

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/*
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 * tee-- pipe fitting
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 */
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#include <u.h>
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#include <libc.h>
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int	uflag;
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int	aflag;
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int	*openf;
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char in[8192];
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int	intignore(void*, char*);
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void
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main(int argc, char **argv)
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{
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	int i;
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	int r, n;
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	ARGBEGIN {
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	case 'a':
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		aflag++;
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		break;
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	case 'i':
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		atnotify(intignore, 1);
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		break;
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	case 'u':
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		uflag++;
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		/* uflag is ignored and undocumented; it's a relic from Unix */
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		break;
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	default:
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		fprint(2, "usage: tee [-ai] [file ...]\n");
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		exits("usage");
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	} ARGEND
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	openf = malloc((1+argc)*sizeof(int));
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	if(openf == nil)
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		sysfatal("out of memory: %r");
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	n = 0;
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	while(*argv) {
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		if(aflag) {
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			openf[n] = open(argv[0], OWRITE);
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			if(openf[n] < 0)
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				openf[n] = create(argv[0], OWRITE, 0666);
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			seek(openf[n], 0L, 2);
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		} else
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			openf[n] = create(argv[0], OWRITE, 0666);
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		if(openf[n] < 0) {
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			fprint(2, "tee: cannot open %s: %r\n", argv[0]);
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		} else
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			n++;
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		argv++;
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	}
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	openf[n++] = 1;
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	for(;;) {
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		r = read(0, in, sizeof in);
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		if(r <= 0)
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			exits(nil);
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		for(i=0; i<n; i++)
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			write(openf[i], in, r);
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	}
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}
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int
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intignore(void *a, char *msg)
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{
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	USED(a);
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	if(strcmp(msg, "interrupt") == 0)
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		return 1;
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	return 0;
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}