2 * Copyright (c) 2013 Johann 'Myrkraverk' Oskarsson.
3 * Copyright (c) 1992 Diomidis Spinellis.
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Diomidis Spinellis of Imperial College, University of London.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 static const char copyright
[] =
40 "@(#) Copyright (c) 1992, 1993\n\
41 The Regents of the University of California. All rights reserved.\n";
45 static const char sccsid
[] = "@(#)main.c 8.2 (Berkeley) 1/3/94";
48 #include <sys/types.h>
50 #include <sys/param.h>
71 * Linked list of units (strings and files) to be compiled
74 struct s_compunit
*next
;
75 enum e_cut
{CU_FILE
, CU_STRING
} type
;
76 char *s
; /* Pointer to string or fname */
80 * Linked list pointer to compilation units and pointer to current
83 static struct s_compunit
*script
, **cu_nextp
= &script
;
86 * Linked list of files to be processed
94 * Linked list pointer to files and pointer to current
97 static struct s_flist
*files
, **fl_nextp
= &files
;
99 FILE *infile
; /* Current input file */
100 FILE *outfile
; /* Current output file */
102 int aflag
, eflag
, nflag
;
104 static int rval
; /* Exit status */
106 static int ispan
; /* Whether inplace editing spans across files */
109 * Current file and line number; line numbers restart across compilation
110 * units, but span across input files. The latter is optional if editing
113 const char *fname
; /* File name. */
114 const char *outfname
; /* Output file name */
115 static char oldfname
[PATH_MAX
]; /* Old file name (for in-place editing) */
116 static char tmpfname
[PATH_MAX
]; /* Temporary file name (for in-place editing) */
117 static const char *inplace
; /* Inplace edit file extension. */
120 static void add_compunit(enum e_cut
, char *);
121 static void add_file(char *);
122 static void usage(void);
125 main(int argc
, char *argv
[])
130 (void) setlocale(LC_ALL
, "");
135 while ((c
= getopt(argc
, argv
, "EI:ae:f:i:lnru")) != -1)
137 case 'r': /* Gnu sed compat */
139 rflags
= REG_EXTENDED
;
143 ispan
= 1; /* span across input files */
150 if ((temp_arg
= malloc(strlen(optarg
) + 2)) == NULL
)
152 strcpy(temp_arg
, optarg
);
153 strcat(temp_arg
, "\n");
154 add_compunit(CU_STRING
, temp_arg
);
158 add_compunit(CU_FILE
, optarg
);
162 ispan
= 0; /* don't span across input files */
165 if(setvbuf(stdout
, NULL
, _IOLBF
, 0) != 0)
166 warnx("setting line buffered output failed");
172 if(setvbuf(stdout
, NULL
, _IONBF
, 0) != 0)
173 warnx("setting unbuffered output failed");
182 /* First usage case; script is the first arg */
183 if (!eflag
&& !fflag
&& *argv
) {
184 add_compunit(CU_STRING
, *argv
);
190 /* Continue with first and start second usage */
192 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 ((f
= fopen(script
->s
, "r")) == NULL
)
238 err(1, "%s", script
->s
);
243 if (((size_t)snprintf(string_ident
,
244 sizeof(string_ident
), "\"%s\"", script
->s
)) >=
245 sizeof(string_ident
) - 1)
246 (void)strcpy(string_ident
+
247 sizeof(string_ident
) - 6, " ...\"");
248 fname
= string_ident
;
254 if ((p
= fgets(buf
, n
, f
)) != NULL
) {
256 if (linenum
== 1 && buf
[0] == '#' && buf
[1] == 'n')
262 script
= script
->next
;
267 if (linenum
== 0 && s
[0] == '#' && s
[1] == 'n')
281 if (s
== script
->s
) {
282 script
= script
->next
;
285 script
= script
->next
;
310 * Like fgets, but go through the list of files chaining them together.
311 * Set len to the length of the line.
314 mf_fgets(SPACE
*sp
, enum e_spflag spflag
)
318 static char *p
= NULL
;
319 static size_t plen
= 0;
321 static int firstfile
;
323 if (infile
== NULL
) {
325 if (files
->fname
== NULL
) {
327 errx(1, "-I or -i may not be used with stdin");
337 if (infile
!= NULL
&& (c
= getc(infile
)) != EOF
) {
338 (void)ungetc(c
, infile
);
341 /* If we are here then either eof or no files are open yet */
342 if (infile
== stdin
) {
346 if (infile
!= NULL
) {
348 if (*oldfname
!= '\0') {
349 /* if there was a backup file, remove it */
352 * Backup the original. Note that hard links
353 * are not supported on all filesystems.
355 if ((link(fname
, oldfname
) != 0) &&
356 (rename(fname
, oldfname
) != 0)) {
364 if (*tmpfname
!= '\0') {
365 if (outfile
!= NULL
&& outfile
!= stdout
)
366 if (fclose(outfile
) != 0) {
372 if (rename(tmpfname
, fname
) != 0) {
373 /* this should not happen really! */
390 fname
= files
->fname
;
391 if (inplace
!= NULL
) {
392 if (lstat(fname
, &sb
) != 0)
394 if (!(sb
.st_mode
& S_IFREG
))
395 errx(1, "%s: %s %s", fname
,
396 "in-place editing only",
397 "works for regular files");
398 if (*inplace
!= '\0') {
399 strlcpy(oldfname
, fname
,
401 len
= strlcat(oldfname
, inplace
,
403 if (len
> (ssize_t
)sizeof(oldfname
))
404 errx(1, "%s: name too long", fname
);
406 len
= snprintf(tmpfname
, sizeof(tmpfname
),
407 "%s/.!%ld!%s", dirname(fname
), (long)getpid(),
409 if (len
>= (ssize_t
)sizeof(tmpfname
))
410 errx(1, "%s: name too long", fname
);
412 if (outfile
!= NULL
&& outfile
!= stdout
)
414 if ((outfile
= fopen(tmpfname
, "w")) == NULL
)
416 fchown(fileno(outfile
), sb
.st_uid
, sb
.st_gid
);
417 fchmod(fileno(outfile
), sb
.st_mode
& ALLPERMS
);
427 if ((infile
= fopen(fname
, "r")) == NULL
) {
434 * We are here only when infile is open and we still have something
437 * Use getline() so that we can handle essentially infinite input
438 * data. The p and plen are static so each invocation gives
439 * getline() the same buffer which is expanded as needed.
441 len
= getline(&p
, &plen
, infile
);
444 if (len
!= 0 && p
[len
- 1] == '\n') {
445 sp
->append_newline
= 1;
447 } else if (!lastline()) {
448 sp
->append_newline
= 1;
450 sp
->append_newline
= 0;
452 cspace(sp
, p
, len
, spflag
);
460 * Add a compilation unit to the linked list
463 add_compunit(enum e_cut type
, char *s
)
465 struct s_compunit
*cu
;
467 if ((cu
= malloc(sizeof(struct s_compunit
))) == NULL
)
473 cu_nextp
= &cu
->next
;
477 * Add a file to the linked list
484 if ((fp
= malloc(sizeof(struct s_flist
))) == NULL
)
489 fl_nextp
= &fp
->next
;
493 next_files_have_lines(void)
495 struct s_flist
*file
;
500 while ((file
= file
->next
) != NULL
) {
501 if ((file_fd
= fopen(file
->fname
, "r")) == NULL
)
504 if ((ch
= getc(file_fd
)) != EOF
) {
506 * This next file has content, therefore current
507 * file doesn't contains the last line.
527 (inplace
== NULL
|| ispan
) &&
528 next_files_have_lines());
530 if ((ch
= getc(infile
)) == EOF
) {
532 (inplace
== NULL
|| ispan
) &&
533 next_files_have_lines());