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#include <u.h>
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#include <libc.h>
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int	readgid(char*);
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int	uflag;
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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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	Dir dir;
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	char *group;
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	char *errs;
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	ARGBEGIN {
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	default:
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	usage:
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		fprint(2, "usage: chgrp [ -uo ] group file ....\n");
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		exits("usage");
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		return;
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	case 'u':
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	case 'o':
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		uflag++;
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		break;
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	} ARGEND
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	if(argc < 1)
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		goto usage;
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	group = argv[0];
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	errs = 0;
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	for(i=1; i<argc; i++){
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		nulldir(&dir);
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		if(uflag)
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			dir.uid = group;
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		else
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			dir.gid = group;
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		if(dirwstat(argv[i], &dir) == -1) {
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			fprint(2, "chgrp: can't wstat %s: %r\n", argv[i]);
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			errs = "can't wstat";
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			continue;
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		}
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	}
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	exits(errs);
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}