NetBSD-5.0.2/usr.bin/sed/main.c
/* $NetBSD: main.c,v 1.19 2008/09/16 13:32:04 perry Exp $ */
/*-
* 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.
*/
/*-
* Copyright (c) 1992 Diomidis Spinellis.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1992, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94";
#else
__RCSID("$NetBSD: main.c,v 1.19 2008/09/16 13:32:04 perry Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <regex.h>
#include <stddef.h>
#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;
int aflag, eflag, nflag, ere;
/*
* Current file and line number; line numbers restart across compilation
* units, but span across input files.
*/
char *fname; /* File name. */
u_long linenum;
int lastline; /* TRUE on the last line of the last file */
static void add_compunit(enum e_cut, char *);
static void add_file(char *);
int main(int, char **);
int
main(int argc, char *argv[])
{
int c, fflag;
setprogname(*argv);
fflag = 0;
while ((c = getopt(argc, argv, "ae:f:nrE")) != -1)
switch (c) {
case 'a':
aflag = 1;
break;
case 'e':
eflag = 1;
add_compunit(CU_STRING, optarg);
break;
case 'f':
fflag = 1;
add_compunit(CU_FILE, optarg);
break;
case 'n':
nflag = 1;
break;
case 'r':
case 'E':
ere = REG_EXTENDED;
break;
default:
case '?':
(void)fprintf(stderr,
"usage:\t%s [-aEnr] script [file ...]\n\t%s [-aEnr] [-e script] ... [-f script_file] ... [file ...]\n",
getprogname(), getprogname());
exit(1);
}
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(FATAL, "stdout: %s", strerror(errno));
exit (0);
}
/*
* 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)
{
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)
return (NULL);
linenum = 0;
switch (script->type) {
case CU_FILE:
if ((f = fopen(script->s, "r")) == NULL)
err(FATAL,
"%s: %s", script->s, strerror(errno));
fname = script->s;
state = ST_FILE;
goto again;
case CU_STRING:
if ((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;
}
case ST_FILE:
if ((p = fgets(buf, n, f)) != NULL) {
linenum++;
if (linenum == 1 && buf[0] == '#' && buf[1] == 'n')
nflag = 1;
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++;
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++;
return (buf);
}
case '\n':
*p++ = '\n';
*p = '\0';
s++;
linenum++;
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)
{
static FILE *f; /* Current open file */
size_t len;
char *p;
int c;
if (f == NULL)
/* Advance to first non-empty file */
for (;;) {
if (files == NULL) {
lastline = 1;
return (0);
}
if (files->fname == NULL) {
f = stdin;
fname = "stdin";
} else {
fname = files->fname;
if ((f = fopen(fname, "r")) == NULL)
err(FATAL, "%s: %s",
fname, strerror(errno));
}
if ((c = getc(f)) != EOF) {
(void)ungetc(c, f);
break;
}
(void)fclose(f);
files = files->next;
}
if (lastline) {
sp->len = 0;
return (0);
}
/*
* Use fgetln so that we can handle essentially infinite input data.
* Can't use the pointer into the stdio buffer as the process space
* because the ungetc() can cause it to move.
*/
p = fgetln(f, &len);
if (ferror(f))
err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO));
cspace(sp, p, len, spflag);
linenum++;
/* Advance to next non-empty file */
while ((c = getc(f)) == EOF) {
(void)fclose(f);
files = files->next;
if (files == NULL) {
lastline = 1;
return (1);
}
if (files->fname == NULL) {
f = stdin;
fname = "stdin";
} else {
fname = files->fname;
if ((f = fopen(fname, "r")) == NULL)
err(FATAL, "%s: %s", fname, strerror(errno));
}
}
(void)ungetc(c, f);
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;
}