 @@ -1,517 +1,519 @@
-/*	$NetBSD: main.c,v 1.34 2015/03/12 12:40:41 christos Exp $	*/
+/*	$NetBSD: main.c,v 1.35 2019/10/05 20:22:36 christos Exp $	*/
 /*-
  * Copyright (c) 2013 Johann 'Myrkraverk' Oskarsson.
  * Copyright (c) 1992 Diomidis Spinellis.
  * Copyright (c) 1992, 1993
  *	The Regents of the University of California.  All rights reserved.
+ *
  * This code is derived from software contributed to Berkeley by
  * Diomidis Spinellis of Imperial College, University of London.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 #if HAVE_NBTOOL_CONFIG_H
 #include "nbtool_config.h"
 #endif
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: main.c,v 1.34 2015/03/12 12:40:41 christos Exp $");
+__RCSID("$NetBSD: main.c,v 1.35 2019/10/05 20:22:36 christos Exp $");
 #ifdef __FBSDID
 __FBSDID("$FreeBSD: head/usr.bin/sed/main.c 252231 2013-06-26 04:14:19Z pfg $");
 #endif
 #ifndef lint
 __COPYRIGHT("@(#) Copyright (c) 1992, 1993\
 	The Regents of the University of California.  All rights reserved.");
 #endif
 #if 0
 static const char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/3/94";
 #endif
 #include <sys/types.h>
 #include <sys/mman.h>
 #include <sys/param.h>
 #include <sys/stat.h>
 #include <err.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <libgen.h>
 #include <limits.h>
 #include <locale.h>
 #include <regex.h>
 #include <stddef.h>
 #define _WITH_GETLINE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include "defs.h"
 #include "extern.h"
 /*
  * Linked list of units (strings and files) to be compiled
  */
 struct s_compunit {
 	struct s_compunit *next;
 	enum e_cut {CU_FILE, CU_STRING} type;
 	char *s;			/* Pointer to string or fname */
 };
 /*
  * Linked list pointer to compilation units and pointer to current
  * next pointer.
  */
 static struct s_compunit *script, **cu_nextp = &script;
 /*
  * Linked list of files to be processed
  */
 struct s_flist {
 	char *fname;
 	struct s_flist *next;
 };
 /*
  * Linked list pointer to files and pointer to current
  * next pointer.
  */
 static struct s_flist *files, **fl_nextp = &files;
 FILE *infile;			/* Current input file */
 FILE *outfile;			/* Current output file */
 int aflag, eflag, nflag;
 int rflags = 0;
 static int rval;		/* Exit status */
 static int ispan;		/* Whether inplace editing spans across files */
 /*
  * Current file and line number; line numbers restart across compilation
  * units, but span across input files.  The latter is optional if editing
  * in place.
  */
 const char *fname;		/* File name. */
 const char *outfname;		/* Output file name */
 static char oldfname[PATH_MAX];	/* Old file name (for in-place editing) */
 static char tmpfname[PATH_MAX];	/* Temporary file name (for in-place editing) */
 static const char *inplace;	/* Inplace edit file extension. */
 u_long linenum;
 static void add_compunit(enum e_cut, char *);
 static void add_file(char *);
 static void usage(void) __dead;
 int
 main(int argc, char *argv[])
+{
 	int c, fflag;
 	char *temp_arg;
 	setprogname(argv[0]);
 	(void) setlocale(LC_ALL, "");
 	fflag = 0;
 	inplace = NULL;
 	while ((c = getopt(argc, argv, "EI::ae:f:i::lnru")) != -1)
 		switch (c) {
 		case 'r':		/* Gnu sed compat */
 		case 'E':
 			rflags = REG_EXTENDED;
 			break;
 		case 'I':
 			inplace = optarg ? optarg : __UNCONST("");
 			ispan = 1;	/* span across input files */
 			break;
 		case 'a':
 			aflag = 1;
 			break;
 		case 'e':
 			eflag = 1;
 			temp_arg = xmalloc(strlen(optarg) + 2);
 			strcpy(temp_arg, optarg);
 			strcat(temp_arg, "\n");
 			add_compunit(CU_STRING, temp_arg);
 			break;
 		case 'f':
 			fflag = 1;
 			add_compunit(CU_FILE, optarg);
 			break;
 		case 'i':
 			inplace = optarg ? optarg : __UNCONST("");
 			ispan = 0;	/* don't span across input files */
 			break;
 		case 'l':
 #ifdef _IOLBF
 			c = setvbuf(stdout, NULL, _IOLBF, 0);
 #else
 			c = setlinebuf(stdout);
 #endif
 			if (c)
 				warn("setting line buffered output failed");
 			break;
 		case 'n':
 			nflag = 1;
 			break;
 		case 'u':
 #ifdef _IONBF
 			c = setvbuf(stdout, NULL, _IONBF, 0);
 #else
 			c = -1;
 			errno = EOPNOTSUPP;
 #endif
 			if (c)
 				warn("setting unbuffered output failed");
 			break;
 		default:
 		case '?':
 			usage();
+		}
 	argc -= optind;
 	argv += optind;
 	/* First usage case; script is the first arg */
 	if (!eflag && !fflag && *argv) {
 		add_compunit(CU_STRING, *argv);
 		argv++;
+	}
 	compile();
 	/* Continue with first and start second usage */
 	if (*argv)
 		for (; *argv; argv++)
 			add_file(*argv);
 	else
 		add_file(NULL);
 	process();
 	cfclose(prog, NULL);
 	if (fclose(stdout))
 		err(1, "stdout");
 	exit(rval);
+}
 static void
 usage(void)
+{
 	(void)fprintf(stderr,
 	    "Usage:  %s [-aElnru] command [file ...]\n"
 	    "\t%s [-aElnru] [-e command] [-f command_file] [-I[extension]]\n"
 	    "\t    [-i[extension]] [file ...]\n", getprogname(), getprogname());
 	exit(1);
+}
 /*
  * Like fgets, but go through the chain of compilation units chaining them
  * together.  Empty strings and files are ignored.
  */
 char *
 cu_fgets(char *buf, int n, int *more)
+{
 	static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF;
 	static FILE *f;		/* Current open file */
 	static char *s;		/* Current pointer inside string */
 	static char string_ident[30];
 	char *p;
 again:
 	switch (state) {
 	case ST_EOF:
 		if (script == NULL) {
 			if (more != NULL)
 				*more = 0;
 			return (NULL);
+		}
 		linenum = 0;
 		switch (script->type) {
 		case CU_FILE:
 			if ((f = fopen(script->s, "r")) == NULL)
 				err(1, "%s", script->s);
 			fname = script->s;
 			state = ST_FILE;
 			goto again;
 		case CU_STRING:
 			if (((size_t)snprintf(string_ident,
 			    sizeof(string_ident), "\"%s\"", script->s)) >=
 			    sizeof(string_ident) - 1)
 				(void)strcpy(string_ident +
 				    sizeof(string_ident) - 6, " ...\"");
 			fname = string_ident;
 			s = script->s;
 			state = ST_STRING;
 			goto again;
 		default:
 			abort();
+		}
 	case ST_FILE:
 		if ((p = fgets(buf, n, f)) != NULL) {
 			linenum++;
 			if (linenum == 1 && buf[0] == '#' && buf[1] == 'n')
 				nflag = 1;
 			if (more != NULL)
 				*more = !feof(f);
 			return (p);
+		}
 		script = script->next;
 		(void)fclose(f);
 		state = ST_EOF;
 		goto again;
 	case ST_STRING:
 		if (linenum == 0 && s[0] == '#' && s[1] == 'n')
 			nflag = 1;
 		p = buf;
 		for (;;) {
 			if (n-- <= 1) {
 				*p = '\0';
 				linenum++;
 				if (more != NULL)
 					*more = 1;
 				return (buf);
+			}
 			switch (*s) {
 			case '\0':
 				state = ST_EOF;
 				if (s == script->s) {
 					script = script->next;
 					goto again;
 				} else {
 					script = script->next;
 					*p = '\0';
 					linenum++;
 					if (more != NULL)
 						*more = 0;
 					return (buf);
+				}
 			case '\n':
 				*p++ = '\n';
 				*p = '\0';
 				s++;
 				linenum++;
 				if (more != NULL)
 					*more = 0;
 				return (buf);
 			default:
 				*p++ = *s++;
+			}
+		}
+	}
 	/* NOTREACHED */
 	return (NULL);
+}
 /*
  * Like fgets, but go through the list of files chaining them together.
  * Set len to the length of the line.
  */
 int
 mf_fgets(SPACE *sp, enum e_spflag spflag)
+{
 	struct stat sb;
 	size_t len;
 	static char *p = NULL;
 	static size_t plen = 0;
 	int c;
 	static int firstfile;
 	if (infile == NULL) {
 		/* stdin? */
 		if (files->fname == NULL) {
 			if (inplace != NULL)
 				errx(1, "-I or -i may not be used with stdin");
 			infile = stdin;
 			fname = "stdin";
 			outfile = stdout;
 			outfname = "stdout";
+		}
 		firstfile = 1;
+	}
 	for (;;) {
 		if (infile != NULL && (c = getc(infile)) != EOF) {
 			(void)ungetc(c, infile);
 			break;
+		}
 		/* If we are here then either eof or no files are open yet */
 		if (infile == stdin) {
 			sp->len = 0;
 			return (0);
+		}
 		if (infile != NULL) {
 			fclose(infile);
 			if (*oldfname != '\0') {
 				/* if there was a backup file, remove it */
 				unlink(oldfname);
 				/*
 				 * Backup the original.  Note that hard links
 				 * are not supported on all filesystems.
 				 */
 				if ((link(fname, oldfname) != 0) &&
 				   (rename(fname, oldfname) != 0)) {
 					warn("rename()");
 					if (*tmpfname)
 						unlink(tmpfname);
 					exit(1);
+				}
 				*oldfname = '\0';
+			}
 			if (*tmpfname != '\0') {
 				if (outfile != NULL && outfile != stdout)
 					if (fclose(outfile) != 0) {
 						warn("fclose()");
 						unlink(tmpfname);
 						exit(1);
+					}
 				outfile = NULL;
 				if (rename(tmpfname, fname) != 0) {
 					/* this should not happen really! */
 					warn("rename()");
 					unlink(tmpfname);
 					exit(1);
+				}
 				*tmpfname = '\0';
+			}
 			outfname = NULL;
+		}
 		if (firstfile == 0)
 			files = files->next;
 		else
 			firstfile = 0;
 		if (files == NULL) {
 			sp->len = 0;
 			return (0);
+		}
 		fname = files->fname;
 		if (inplace != NULL) {
 			if (lstat(fname, &sb) != 0)
 				err(1, "%s", fname);
 			if (!(sb.st_mode & S_IFREG))
 				errx(1, "%s: %s %s", fname,
 				    "in-place editing only",
 				    "works for regular files");
 			if (*inplace != '\0') {
 				strlcpy(oldfname, fname,
 				    sizeof(oldfname));
 				len = strlcat(oldfname, inplace,
 				    sizeof(oldfname));
 				if (len > sizeof(oldfname))
 					errx(1, "%s: name too long", fname);
+			}
 			char d_name[PATH_MAX], f_name[PATH_MAX];
 			(void)strlcpy(d_name, fname, sizeof(d_name));
 			(void)strlcpy(f_name, fname, sizeof(f_name));
 			len = (size_t)snprintf(tmpfname, sizeof(tmpfname),
 			    "%s/.!%ld!%s", dirname(d_name), (long)getpid(),
 			    basename(f_name));
 			if (len >= sizeof(tmpfname))
 				errx(1, "%s: name too long", fname);
 			unlink(tmpfname);
 			if (outfile != NULL && outfile != stdout)
 				fclose(outfile);
 			if ((outfile = fopen(tmpfname, "w")) == NULL)
 				err(1, "%s", fname);
 			fchown(fileno(outfile), sb.st_uid, sb.st_gid);
 			fchmod(fileno(outfile), sb.st_mode & ALLPERMS);
 			outfname = tmpfname;
 			if (!ispan) {
 				linenum = 0;
 				resetstate();
+			}
 		} else {
 			outfile = stdout;
 			outfname = "stdout";
+		}
 		if ((infile = fopen(fname, "r")) == NULL) {
 			warn("%s", fname);
 			rval = 1;
 			continue;
+		}
+	}
 	/*
 	 * We are here only when infile is open and we still have something
 	 * to read from it.
+	 *
 	 * Use getline() so that we can handle essentially infinite input
 	 * data.  The p and plen are static so each invocation gives
 	 * getline() the same buffer which is expanded as needed.
 	 */
 	ssize_t slen = getline(&p, &plen, infile);
 	if (slen == -1)
 		err(1, "%s", fname);
 	if (slen != 0 && p[slen - 1] == '\n')
 		slen--;
 	cspace(sp, p, (size_t)slen, spflag);
 	linenum++;
 	return (1);
+}
 /*
  * Add a compilation unit to the linked list
  */
 static void
 add_compunit(enum e_cut type, char *s)
+{
 	struct s_compunit *cu;
 	cu = xmalloc(sizeof(struct s_compunit));
 	cu->type = type;
 	cu->s = s;
 	cu->next = NULL;
 	*cu_nextp = cu;
 	cu_nextp = &cu->next;
+}
 /*
  * Add a file to the linked list
  */
 static void
 add_file(char *s)
+{
 	struct s_flist *fp;
 	fp = xmalloc(sizeof(struct s_flist));
 	fp->next = NULL;
 	*fl_nextp = fp;
 	fp->fname = s;
 	fl_nextp = &fp->next;
+}
 int
 lastline(void)
+{
 	int ch;
 	if (files->next != NULL && (inplace == NULL || ispan))
 		return (0);
 	if ((ch = getc(infile)) == EOF)
 		return (1);
 	ungetc(ch, infile);
 	return (0);
+}