76 lines
1.4 KiB
C
Executable File
76 lines
1.4 KiB
C
Executable File
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/*
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* Copyright (c) 1985, 1986, 1987, 1988, 1989, 1990 by Sun Microsystems, Inc.
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*/
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#ident "@(#)stdhosts.c 1.2 92/07/14 SMI" /* SMI4.1 1.7 */
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#include <stdio.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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/*
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* Filter to convert addresses in /etc/hosts file to standard form
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*/
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main(argc, argv)
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char **argv;
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{
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char line[256];
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char adr[256];
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char *any(), *trailer;
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extern char *inet_ntoa();
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extern u_long inet_addr();
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FILE *fp;
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if (argc > 1) {
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fp = fopen(argv[1], "r");
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if (fp == NULL) {
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fprintf(stderr, "stdhosts: can't open %s\n", argv[1]);
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exit(1);
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}
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} else
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fp = stdin;
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while ( fgets(line, sizeof(line), fp)) {
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struct in_addr in;
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if (line[0] == '#')
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continue;
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if ((trailer = any(line, " \t")) == NULL)
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continue;
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sscanf(line, "%s", adr);
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in.s_addr = inet_addr(adr);
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if (-1 == (int)in.s_addr) {
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fprintf(stderr,
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"%s: Warning: malformed line ignored:\n%s",
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argv[0], line);
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} else {
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fputs(inet_ntoa(in), stdout);
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fputs(trailer, stdout);
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}
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}
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exit(0);
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/* NOTREACHED */
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}
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/*
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* scans cp, looking for a match with any character
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* in match. Returns pointer to place in cp that matched
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* (or NULL if no match)
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*/
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static char *
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any(cp, match)
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register char *cp;
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char *match;
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{
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register char *mp, c;
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while (c = *cp) {
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for (mp = match; *mp; mp++)
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if (*mp == c)
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return (cp);
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cp++;
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}
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return (NULL);
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}
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