Simplify redundant malloc'ing in sed -e. It is causing havoc in the ports tree: ===> Configuring for wxsvg-1.5.7 sed: 1: "/gcc_dir=\\`/s/gcc /$CC /": bad flag in substitute command: '/' *** Error code 1 ===> Patching for vips-8.3.1 sed: 1: "1s|^#![[:space:]]*/usr/ ...": bad flag in substitute command: 's' *** Error code 1 PR: 195929 Reported by: danilo
538 lines
12 KiB
C
538 lines
12 KiB
C
/*-
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* Copyright (c) 2013 Johann 'Myrkraverk' Oskarsson.
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* Copyright (c) 1992 Diomidis Spinellis.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Diomidis Spinellis of Imperial College, University of London.
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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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* 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. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1992, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#ifndef lint
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static const char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94";
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#endif
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <libgen.h>
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#include <limits.h>
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#include <locale.h>
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#include <regex.h>
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#include <stddef.h>
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#define _WITH_GETLINE
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "defs.h"
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#include "extern.h"
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/*
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* Linked list of units (strings and files) to be compiled
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*/
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struct s_compunit {
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struct s_compunit *next;
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enum e_cut {CU_FILE, CU_STRING} type;
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char *s; /* Pointer to string or fname */
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};
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/*
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* Linked list pointer to compilation units and pointer to current
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* next pointer.
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*/
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static struct s_compunit *script, **cu_nextp = &script;
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/*
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* Linked list of files to be processed
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*/
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struct s_flist {
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char *fname;
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struct s_flist *next;
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};
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/*
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* Linked list pointer to files and pointer to current
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* next pointer.
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*/
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static struct s_flist *files, **fl_nextp = &files;
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FILE *infile; /* Current input file */
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FILE *outfile; /* Current output file */
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int aflag, eflag, nflag;
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int rflags = 0;
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static int rval; /* Exit status */
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static int ispan; /* Whether inplace editing spans across files */
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/*
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* Current file and line number; line numbers restart across compilation
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* units, but span across input files. The latter is optional if editing
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* in place.
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*/
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const char *fname; /* File name. */
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const char *outfname; /* Output file name */
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static char oldfname[PATH_MAX]; /* Old file name (for in-place editing) */
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static char tmpfname[PATH_MAX]; /* Temporary file name (for in-place editing) */
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static const char *inplace; /* Inplace edit file extension. */
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u_long linenum;
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static void add_compunit(enum e_cut, char *);
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static void add_file(char *);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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int c, fflag;
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char *temp_arg;
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(void) setlocale(LC_ALL, "");
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fflag = 0;
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inplace = NULL;
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while ((c = getopt(argc, argv, "EI:ae:f:i:lnru")) != -1)
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switch (c) {
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case 'r': /* Gnu sed compat */
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case 'E':
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rflags = REG_EXTENDED;
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break;
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case 'I':
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inplace = optarg;
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ispan = 1; /* span across input files */
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break;
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case 'a':
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aflag = 1;
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break;
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case 'e':
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eflag = 1;
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if ((temp_arg = malloc(strlen(optarg) + 2)) == NULL)
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err(1, "malloc");
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strcpy(temp_arg, optarg);
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strcat(temp_arg, "\n");
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add_compunit(CU_STRING, temp_arg);
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break;
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case 'f':
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fflag = 1;
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add_compunit(CU_FILE, optarg);
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break;
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case 'i':
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inplace = optarg;
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ispan = 0; /* don't span across input files */
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break;
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case 'l':
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if(setvbuf(stdout, NULL, _IOLBF, 0) != 0)
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warnx("setting line buffered output failed");
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break;
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case 'n':
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nflag = 1;
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break;
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case 'u':
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if(setvbuf(stdout, NULL, _IONBF, 0) != 0)
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warnx("setting unbuffered output failed");
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break;
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default:
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case '?':
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usage();
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}
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argc -= optind;
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argv += optind;
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/* First usage case; script is the first arg */
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if (!eflag && !fflag && *argv) {
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add_compunit(CU_STRING, *argv);
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argv++;
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}
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compile();
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/* Continue with first and start second usage */
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if (*argv)
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for (; *argv; argv++)
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add_file(*argv);
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else
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add_file(NULL);
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process();
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cfclose(prog, NULL);
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if (fclose(stdout))
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err(1, "stdout");
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exit(rval);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"usage: %s script [-Ealnru] [-i extension] [file ...]\n"
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"\t%s [-Ealnu] [-i extension] [-e script] ... [-f script_file]"
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" ... [file ...]\n", getprogname(), getprogname());
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exit(1);
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}
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/*
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* Like fgets, but go through the chain of compilation units chaining them
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* together. Empty strings and files are ignored.
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*/
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char *
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cu_fgets(char *buf, int n, int *more)
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{
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static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF;
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static FILE *f; /* Current open file */
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static char *s; /* Current pointer inside string */
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static char string_ident[30];
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char *p;
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again:
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switch (state) {
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case ST_EOF:
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if (script == NULL) {
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if (more != NULL)
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*more = 0;
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return (NULL);
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}
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linenum = 0;
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switch (script->type) {
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case CU_FILE:
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if ((f = fopen(script->s, "r")) == NULL)
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err(1, "%s", script->s);
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fname = script->s;
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state = ST_FILE;
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goto again;
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case CU_STRING:
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if (((size_t)snprintf(string_ident,
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sizeof(string_ident), "\"%s\"", script->s)) >=
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sizeof(string_ident) - 1)
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(void)strcpy(string_ident +
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sizeof(string_ident) - 6, " ...\"");
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fname = string_ident;
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s = script->s;
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state = ST_STRING;
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goto again;
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}
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case ST_FILE:
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if ((p = fgets(buf, n, f)) != NULL) {
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linenum++;
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if (linenum == 1 && buf[0] == '#' && buf[1] == 'n')
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nflag = 1;
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if (more != NULL)
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*more = !feof(f);
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return (p);
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}
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script = script->next;
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(void)fclose(f);
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state = ST_EOF;
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goto again;
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case ST_STRING:
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if (linenum == 0 && s[0] == '#' && s[1] == 'n')
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nflag = 1;
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p = buf;
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for (;;) {
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if (n-- <= 1) {
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*p = '\0';
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linenum++;
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if (more != NULL)
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*more = 1;
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return (buf);
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}
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switch (*s) {
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case '\0':
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state = ST_EOF;
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if (s == script->s) {
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script = script->next;
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goto again;
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} else {
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script = script->next;
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*p = '\0';
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linenum++;
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if (more != NULL)
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*more = 0;
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return (buf);
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}
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case '\n':
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*p++ = '\n';
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*p = '\0';
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s++;
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linenum++;
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if (more != NULL)
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*more = 0;
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return (buf);
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default:
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*p++ = *s++;
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}
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}
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}
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/* NOTREACHED */
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return (NULL);
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}
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/*
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* Like fgets, but go through the list of files chaining them together.
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* Set len to the length of the line.
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*/
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int
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mf_fgets(SPACE *sp, enum e_spflag spflag)
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{
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struct stat sb;
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ssize_t len;
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static char *p = NULL;
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static size_t plen = 0;
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int c;
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static int firstfile;
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if (infile == NULL) {
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/* stdin? */
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if (files->fname == NULL) {
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if (inplace != NULL)
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errx(1, "-I or -i may not be used with stdin");
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infile = stdin;
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fname = "stdin";
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outfile = stdout;
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outfname = "stdout";
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}
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firstfile = 1;
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}
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for (;;) {
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if (infile != NULL && (c = getc(infile)) != EOF) {
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(void)ungetc(c, infile);
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break;
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}
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/* If we are here then either eof or no files are open yet */
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if (infile == stdin) {
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sp->len = 0;
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return (0);
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}
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if (infile != NULL) {
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fclose(infile);
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if (*oldfname != '\0') {
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/* if there was a backup file, remove it */
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unlink(oldfname);
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/*
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* Backup the original. Note that hard links
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* are not supported on all filesystems.
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*/
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if ((link(fname, oldfname) != 0) &&
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(rename(fname, oldfname) != 0)) {
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warn("rename()");
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if (*tmpfname)
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unlink(tmpfname);
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exit(1);
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}
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*oldfname = '\0';
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}
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if (*tmpfname != '\0') {
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if (outfile != NULL && outfile != stdout)
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if (fclose(outfile) != 0) {
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warn("fclose()");
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unlink(tmpfname);
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exit(1);
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}
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outfile = NULL;
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if (rename(tmpfname, fname) != 0) {
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/* this should not happen really! */
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warn("rename()");
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unlink(tmpfname);
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exit(1);
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}
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*tmpfname = '\0';
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}
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outfname = NULL;
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}
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if (firstfile == 0)
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files = files->next;
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else
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firstfile = 0;
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if (files == NULL) {
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sp->len = 0;
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return (0);
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}
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fname = files->fname;
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if (inplace != NULL) {
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if (lstat(fname, &sb) != 0)
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err(1, "%s", fname);
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if (!(sb.st_mode & S_IFREG))
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errx(1, "%s: %s %s", fname,
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"in-place editing only",
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"works for regular files");
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if (*inplace != '\0') {
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strlcpy(oldfname, fname,
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sizeof(oldfname));
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len = strlcat(oldfname, inplace,
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sizeof(oldfname));
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if (len > (ssize_t)sizeof(oldfname))
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errx(1, "%s: name too long", fname);
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}
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len = snprintf(tmpfname, sizeof(tmpfname),
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"%s/.!%ld!%s", dirname(fname), (long)getpid(),
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basename(fname));
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if (len >= (ssize_t)sizeof(tmpfname))
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errx(1, "%s: name too long", fname);
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unlink(tmpfname);
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if (outfile != NULL && outfile != stdout)
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fclose(outfile);
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if ((outfile = fopen(tmpfname, "w")) == NULL)
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err(1, "%s", fname);
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fchown(fileno(outfile), sb.st_uid, sb.st_gid);
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fchmod(fileno(outfile), sb.st_mode & ALLPERMS);
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outfname = tmpfname;
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if (!ispan) {
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linenum = 0;
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resetstate();
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}
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} else {
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outfile = stdout;
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outfname = "stdout";
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}
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if ((infile = fopen(fname, "r")) == NULL) {
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warn("%s", fname);
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rval = 1;
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continue;
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}
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}
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/*
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* We are here only when infile is open and we still have something
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* to read from it.
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*
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* Use getline() so that we can handle essentially infinite input
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* data. The p and plen are static so each invocation gives
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* getline() the same buffer which is expanded as needed.
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*/
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len = getline(&p, &plen, infile);
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if (len == -1)
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err(1, "%s", fname);
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if (len != 0 && p[len - 1] == '\n') {
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sp->append_newline = 1;
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len--;
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} else if (!lastline()) {
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sp->append_newline = 1;
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} else {
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sp->append_newline = 0;
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}
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cspace(sp, p, len, spflag);
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linenum++;
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return (1);
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}
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/*
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* Add a compilation unit to the linked list
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*/
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static void
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add_compunit(enum e_cut type, char *s)
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{
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struct s_compunit *cu;
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if ((cu = malloc(sizeof(struct s_compunit))) == NULL)
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err(1, "malloc");
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cu->type = type;
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cu->s = s;
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cu->next = NULL;
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*cu_nextp = cu;
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cu_nextp = &cu->next;
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}
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/*
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* Add a file to the linked list
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*/
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static void
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add_file(char *s)
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{
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struct s_flist *fp;
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if ((fp = malloc(sizeof(struct s_flist))) == NULL)
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err(1, "malloc");
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fp->next = NULL;
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*fl_nextp = fp;
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fp->fname = s;
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fl_nextp = &fp->next;
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}
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static int
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next_files_have_lines(void)
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{
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struct s_flist *file;
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FILE *file_fd;
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int ch;
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file = files;
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while ((file = file->next) != NULL) {
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if ((file_fd = fopen(file->fname, "r")) == NULL)
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continue;
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if ((ch = getc(file_fd)) != EOF) {
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/*
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* This next file has content, therefore current
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* file doesn't contains the last line.
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*/
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ungetc(ch, file_fd);
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fclose(file_fd);
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return (1);
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}
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fclose(file_fd);
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}
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return (0);
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}
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int
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lastline(void)
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{
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int ch;
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if (feof(infile)) {
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return !(
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(inplace == NULL || ispan) &&
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next_files_have_lines());
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}
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if ((ch = getc(infile)) == EOF) {
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return !(
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(inplace == NULL || ispan) &&
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next_files_have_lines());
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}
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ungetc(ch, infile);
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return (0);
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}
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