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WebSVN – planix.SVN – Blame – /os/branches/planix-v0/sys/src/cmd/aux/clog.c – Rev 2

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/* clog - log console */
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#include <u.h>
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#include <libc.h>
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#include <bio.h>
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char *argv0;
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int
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openlog(char *name)
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{
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	int fd;
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	fd = open(name, OWRITE);
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	if(fd < 0)
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		fd = create(name, OWRITE, DMAPPEND|0666);
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	if(fd < 0){
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		fprint(2, "%s: can't open %s: %r\n", argv0, name);
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		return -1;
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	}
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	seek(fd, 0, 2);
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	return fd;
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}
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void
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main(int argc, char **argv)
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{
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	Biobuf in;
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	int fd;
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	char *p, *t;
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	char buf[Bsize];
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	argv0 = argv[0];
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	if(argc < 3){
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		fprint(2, "usage: %s console logfile \n", argv0);
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		exits("usage");
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	}
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	fd = open(argv[1], OREAD);
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	if(fd < 0){
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		fprint(2, "%s: can't open %s: %r\n", argv0, argv[1]);
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		exits("open");
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	}
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	Binit(&in, fd, OREAD);
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	fd = openlog(argv[2]);
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	for(;;){
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		if(p = Brdline(&in, '\n')){
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			p[Blinelen(&in)-1] = 0;
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			t = ctime(time(0));
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			t[19] = 0;
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			while(fprint(fd, "%s: %s\n", t, p) < 0) {
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				close(fd);
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				sleep(500);
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				fd = openlog(argv[2]);
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			}
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		} else if(Blinelen(&in) == 0)	/* true eof or error */
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			break;
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		/* discard partial buffer? perhaps due to very long line */
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		else if (Bread(&in, buf, sizeof buf) < 0)
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			break;
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	}
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	exits(0);
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}