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/* $OpenBSD: ident.c,v 1.31 2015/11/02 16:45:21 nicm Exp $ */ |
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/* |
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* Copyright (c) 2005 Xavier Santolaria <xsa@openbsd.org> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include <ctype.h> |
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#include <err.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include "rcsprog.h" |
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#define KEYDELIM '$' /* keywords delimiter */ |
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#define VALDELIM ':' /* values delimiter */ |
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static int found = 0; |
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static int flags = 0; |
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static void ident_file(const char *, FILE *); |
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static void ident_line(FILE *); |
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int |
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ident_main(int argc, char **argv) |
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{ |
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int i, ch, status; |
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FILE *fp; |
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status = 0; |
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while ((ch = rcs_getopt(argc, argv, "qV")) != -1) { |
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switch(ch) { |
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case 'q': |
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flags |= QUIET; |
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break; |
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case 'V': |
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printf("%s\n", rcs_version); |
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exit(0); |
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default: |
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(usage)(); |
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} |
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} |
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argc -= rcs_optind; |
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argv += rcs_optind; |
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if (argc == 0) |
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ident_file(NULL, stdin); |
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else { |
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for (i = 0; i < argc; i++) { |
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if ((fp = fopen(argv[i], "r")) == NULL) { |
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warn("%s", argv[i]); |
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status = 1; |
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continue; |
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} |
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ident_file(argv[i], fp); |
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(void)fclose(fp); |
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if (i != argc - 1) |
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printf("\n"); |
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} |
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} |
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return (status); |
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} |
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static void |
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ident_file(const char *filename, FILE *fp) |
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{ |
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int c; |
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if (filename != NULL) |
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printf("%s:\n", filename); |
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else |
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filename = "standard input"; |
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for (c = 0; c != EOF; c = getc(fp)) { |
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if (feof(fp) || ferror(fp)) |
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break; |
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if (c == KEYDELIM) |
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ident_line(fp); |
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} |
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if (found == 0 && !(flags & QUIET)) |
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fprintf(stderr, "ident warning: no id keywords in %s\n", |
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filename); |
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found = 0; |
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} |
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static void |
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ident_line(FILE *fp) |
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{ |
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int c; |
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BUF *bp; |
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size_t len; |
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bp = buf_alloc(512); |
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while ((c = getc(fp)) != VALDELIM) { |
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if (c == EOF) |
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goto out; |
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if (isalpha(c)) |
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buf_putc(bp, c); |
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else |
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goto out; |
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} |
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buf_putc(bp, VALDELIM); |
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while ((c = getc(fp)) != KEYDELIM) { |
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if (c == EOF) |
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goto out; |
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if (c == '\n') |
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goto out; |
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buf_putc(bp, c); |
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} |
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len = buf_len(bp); |
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if (buf_getc(bp, len - 1) != ' ') |
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goto out; |
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/* append trailing KEYDELIM */ |
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buf_putc(bp, c); |
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/* Append newline for printing. */ |
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buf_putc(bp, '\n'); |
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printf(" %c", KEYDELIM); |
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fflush(stdout); |
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buf_write_fd(bp, STDOUT_FILENO); |
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found++; |
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out: |
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buf_free(bp); |
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} |
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__dead void |
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ident_usage(void) |
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{ |
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fprintf(stderr, "usage: ident [-qV] [file ...]\n"); |
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exit(1); |
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} |