2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2013 Johann 'Myrkraverk' Oskarsson.
5 * Copyright (c) 1992 Diomidis Spinellis.
6 * Copyright (c) 1992, 1993
7 * The Regents of the University of California. All rights reserved.
9 * This code is derived from software contributed to Berkeley by
10 * Diomidis Spinellis of Imperial College, University of London.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#) Copyright (c) 1992, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)main.c 8.2 (Berkeley) 1/3/94
38 * $FreeBSD: head/usr.bin/sed/main.c 362017 2020-06-10 19:23:58Z 0mp $
41 #include <sys/cdefs.h>
43 #include <sys/types.h>
45 #include <sys/param.h>
65 * Linked list of units (strings and files) to be compiled
68 struct s_compunit
*next
;
69 enum e_cut
{CU_FILE
, CU_STRING
} type
;
70 char *s
; /* Pointer to string or fname */
74 * Linked list pointer to compilation units and pointer to current
77 static struct s_compunit
*script
, **cu_nextp
= &script
;
80 * Linked list of files to be processed
88 * Linked list pointer to files and pointer to current
91 static struct s_flist
*files
, **fl_nextp
= &files
;
93 FILE *infile
; /* Current input file */
94 FILE *outfile
; /* Current output file */
96 int aflag
, eflag
, nflag
;
99 static int rval
; /* Exit status */
101 static int ispan
; /* Whether inplace editing spans across files */
104 * Current file and line number; line numbers restart across compilation
105 * units, but span across input files. The latter is optional if editing
108 const char *fname
; /* File name. */
109 const char *outfname
; /* Output file name */
110 static char oldfname
[PATH_MAX
]; /* Old file name (for in-place editing) */
111 static char tmpfname
[PATH_MAX
]; /* Temporary file name (for in-place editing) */
112 const char *inplace
; /* Inplace edit file extension. */
115 static void add_compunit(enum e_cut
, char *);
116 static void add_file(char *);
117 static void usage(void);
120 main(int argc
, char *argv
[])
122 int c
, fflag
, fflagstdin
;
125 (void) setlocale(LC_ALL
, "");
131 while ((c
= getopt(argc
, argv
, "EI:ae:f:i:lnru")) != -1)
133 case 'r': /* GNU sed compat */
135 rflags
= REG_EXTENDED
;
139 ispan
= 1; /* span across input files */
146 if ((temp_arg
= malloc(strlen(optarg
) + 2)) == NULL
)
148 strcpy(temp_arg
, optarg
);
149 strcat(temp_arg
, "\n");
150 add_compunit(CU_STRING
, temp_arg
);
154 if (strcmp(optarg
, "-") == 0)
156 add_compunit(CU_FILE
, optarg
);
160 ispan
= 0; /* don't span across input files */
163 if(setvbuf(stdout
, NULL
, _IOLBF
, 0) != 0)
164 warnx("setting line buffered output failed");
170 if(setvbuf(stdout
, NULL
, _IONBF
, 0) != 0)
171 warnx("setting unbuffered output failed");
180 /* First usage case; script is the first arg */
181 if (!eflag
&& !fflag
&& *argv
) {
182 add_compunit(CU_STRING
, *argv
);
188 /* Continue with first and start second usage */
190 for (; *argv
; argv
++)
206 (void)fprintf(stderr
,
207 "usage: %s script [-Ealnru] [-i extension] [file ...]\n"
208 "\t%s [-Ealnu] [-i extension] [-e script] ... [-f script_file]"
209 " ... [file ...]\n", getprogname(), getprogname());
214 * Like fgets, but go through the chain of compilation units chaining them
215 * together. Empty strings and files are ignored.
218 cu_fgets(char *buf
, int n
, int *more
)
220 static enum {ST_EOF
, ST_FILE
, ST_STRING
} state
= ST_EOF
;
221 static FILE *f
; /* Current open file */
222 static char *s
; /* Current pointer inside string */
223 static char string_ident
[30];
229 if (script
== NULL
) {
235 switch (script
->type
) {
237 if (strcmp(script
->s
, "-") == 0) {
241 if ((f
= fopen(script
->s
, "r")) == NULL
)
242 err(1, "%s", script
->s
);
248 if (((size_t)snprintf(string_ident
,
249 sizeof(string_ident
), "\"%s\"", script
->s
)) >=
250 sizeof(string_ident
) - 1)
251 (void)strcpy(string_ident
+
252 sizeof(string_ident
) - 6, " ...\"");
253 fname
= string_ident
;
258 errx(1, "illegal script type: %d", script
->type
);
261 if ((p
= fgets(buf
, n
, f
)) != NULL
) {
263 if (linenum
== 1 && buf
[0] == '#' && buf
[1] == 'n')
269 script
= script
->next
;
274 if (linenum
== 0 && s
[0] == '#' && s
[1] == 'n')
288 if (s
== script
->s
) {
289 script
= script
->next
;
292 script
= script
->next
;
317 * Like fgets, but go through the list of files chaining them together.
318 * Set len to the length of the line.
321 mf_fgets(SPACE
*sp
, enum e_spflag spflag
)
325 char *dirbuf
, *basebuf
;
326 static char *p
= NULL
;
327 static size_t plen
= 0;
329 static int firstfile
;
331 if (infile
== NULL
) {
333 if (files
->fname
== NULL
) {
335 errx(1, "-I or -i may not be used with stdin");
345 if (infile
!= NULL
&& (c
= getc(infile
)) != EOF
&& !quit
) {
346 (void)ungetc(c
, infile
);
349 /* If we are here then either eof or no files are open yet */
350 if (infile
== stdin
) {
354 if (infile
!= NULL
) {
356 if (*oldfname
!= '\0') {
357 /* if there was a backup file, remove it */
360 * Backup the original. Note that hard links
361 * are not supported on all filesystems.
363 if ((link(fname
, oldfname
) != 0) &&
364 (rename(fname
, oldfname
) != 0)) {
372 if (*tmpfname
!= '\0') {
373 if (outfile
!= NULL
&& outfile
!= stdout
)
374 if (fclose(outfile
) != 0) {
380 if (rename(tmpfname
, fname
) != 0) {
381 /* this should not happen really! */
398 fname
= files
->fname
;
399 if (inplace
!= NULL
) {
400 if (lstat(fname
, &sb
) != 0)
402 if (!S_ISREG(sb
.st_mode
))
403 errx(1, "%s: %s %s", fname
,
404 "in-place editing only",
405 "works for regular files");
406 if (*inplace
!= '\0') {
407 strlcpy(oldfname
, fname
,
409 len
= strlcat(oldfname
, inplace
,
411 if (len
> (ssize_t
)sizeof(oldfname
))
412 errx(1, "%s: name too long", fname
);
414 if ((dirbuf
= strdup(fname
)) == NULL
||
415 (basebuf
= strdup(fname
)) == NULL
)
417 len
= snprintf(tmpfname
, sizeof(tmpfname
),
418 "%s/.!%ld!%s", dirname(dirbuf
), (long)getpid(),
422 if (len
>= (ssize_t
)sizeof(tmpfname
))
423 errx(1, "%s: name too long", fname
);
425 if (outfile
!= NULL
&& outfile
!= stdout
)
427 if ((outfile
= fopen(tmpfname
, "w")) == NULL
)
429 fchown(fileno(outfile
), sb
.st_uid
, sb
.st_gid
);
430 fchmod(fileno(outfile
), sb
.st_mode
& ALLPERMS
);
440 if ((infile
= fopen(fname
, "r")) == NULL
) {
447 * We are here only when infile is open and we still have something
450 * Use getline() so that we can handle essentially infinite input
451 * data. The p and plen are static so each invocation gives
452 * getline() the same buffer which is expanded as needed.
454 len
= getline(&p
, &plen
, infile
);
457 if (len
!= 0 && p
[len
- 1] == '\n') {
458 sp
->append_newline
= 1;
460 } else if (!lastline()) {
461 sp
->append_newline
= 1;
463 sp
->append_newline
= 0;
465 cspace(sp
, p
, len
, spflag
);
473 * Add a compilation unit to the linked list
476 add_compunit(enum e_cut type
, char *s
)
478 struct s_compunit
*cu
;
480 if ((cu
= malloc(sizeof(struct s_compunit
))) == NULL
)
486 cu_nextp
= &cu
->next
;
490 * Add a file to the linked list
497 if ((fp
= malloc(sizeof(struct s_flist
))) == NULL
)
502 fl_nextp
= &fp
->next
;
506 next_files_have_lines(void)
508 struct s_flist
*file
;
513 while ((file
= file
->next
) != NULL
) {
514 if ((file_fd
= fopen(file
->fname
, "r")) == NULL
)
517 if ((ch
= getc(file_fd
)) != EOF
) {
519 * This next file has content, therefore current
520 * file doesn't contains the last line.
540 (inplace
== NULL
|| ispan
) &&
541 next_files_have_lines());
543 if ((ch
= getc(infile
)) == EOF
) {
545 (inplace
== NULL
|| ispan
) &&
546 next_files_have_lines());