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/* @(#)util/dcasehost.c 1.2 24 Oct 1990 05:26:18 */
/*
* Copyright (C) 1987, 1988 Ronald S. Karr and Landon Curt Noll
*
* See the file COPYING, distributed with smail, for restriction
* and warranty information.
*/
/*
* dcasehost - downcase the host field of standard pathalias output
*
* Downcase the first field (non-while chars up to whitespace).
* In the common case of pathalias, this downcases the hostname
* while leaving the path untouched.
*
* If the -c option is used, then input is assumed to be of
* pathalias -c form:
* cost hostname path
* and is converted to:
* hostname path cost
* before downcase is done.
*/
#include <stdio.h>
#include "defs.h"
#ifdef USE_ASCII
extern char lowcase[]; /* lower case conversion table */
extern char upcase[]; /* upper case conversion table */
#endif /* USE_ASCII */
char *program; /* argv[0] from main */
char buf[BUFSIZ+1+1]; /* i/o line buffer */
char buf2[BUFSIZ+1+1]; /* holder for field one switch (-c) */
char buf3[BUFSIZ+1+1]; /* holder for other fields (-c) */
void
main(argc, argv)
int argc; /* arg count */
char *argv[]; /* args */
{
char *f1_white; /* first whitespace beyond field 1 */
int cflag = 0; /* cflag == 1 ==> field switch */
/*
* parse args
*/
program = argv[0];
if ( argc > 2 ) {
fprintf(stderr, "%s: usage: %s [-c]\n", program, program);
exit(-1);
} else if (argc == 2) {
if (strcmp(argv[1], "-c") != 0) {
fprintf(stderr, "%s: usage: %s [-c]\n", program, program);
exit(-1);
}
cflag = 1;
}
/*
* process input lines until EOF
*/
while (fgets(buf, BUFSIZ, stdin) != NULL) {
/*
* if -c, move the fields
*/
if (cflag) {
char *f2_field; /* first char of field 2 */
char *f_end; /* last char */
/* find first whitespace char beyond field 1 */
f1_white = strpbrk(&buf[strspn(buf, " \t\n")], " \t\n");
/* find first char of field 2 */
if (f1_white != NULL) {
f2_field = &f1_white[strspn(f1_white, " \t\n")];
}
/* find last char */
f_end = &buf[strlen(buf)-1];
/* switch fields if firewall checks allow it */
if (f1_white != NULL && *f1_white != '\0' &&
*f2_field != '\0' &&
f_end > buf && *f_end == '\n') {
/* save field 1 with newline and NULL */
strncpy(buf2, buf, (int)(f1_white-buf));
buf2[f1_white-buf] = '\n';
buf2[f1_white-buf+1] = '\0';
/* move field 2 and beyond to front of line */
strcpy(buf3, f2_field);
strcpy(buf, buf3);
/*
* add field 1 on the end of new line
*
* use white space before field 1 to separate
* field 1 from the end of the line, if we can
*/
if (buf2[0] == ' ' || buf2[0] == '\t') {
/* overwrite the old trailing newline */
strncpy(&buf[f_end-f2_field], buf2, f1_white-buf+2);
} else {
/* separate old line end and field 1 with a tab */
buf[f_end-f2_field] = '\t';
strncpy(&buf[f_end-f2_field+1], buf2, f1_white-buf+2);
}
}
}
/*
* downcase the first field
*/
/* find first whitespace char beyond field 1 */
f1_white = strpbrk(&buf[strspn(buf, " \t\n")], " \t\n");
/* downcase field 1 if it exists */
if (f1_white != NULL) {
register char *p; /* index */
for (p=buf; p < f1_white; ++p) {
*p = tolower(*p);
}
}
/*
* print the resulting line
*/
fputs(buf, stdout);
}
exit(0);
}
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