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
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
41 static const char copyright[] =
42 "@(#) Copyright (c) 1992, 1993\n\
43 The Regents of the University of California. All rights reserved.\n";
47 static const char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94";
50 #include <sys/types.h>
52 #include <sys/param.h>
72 * Linked list of units (strings and files) to be compiled
75 struct s_compunit *next;
76 enum e_cut {CU_FILE, CU_STRING} type;
77 char *s; /* Pointer to string or fname */
81 * Linked list pointer to compilation units and pointer to current
84 static struct s_compunit *script, **cu_nextp = &script;
87 * Linked list of files to be processed
95 * Linked list pointer to files and pointer to current
98 static struct s_flist *files, **fl_nextp = &files;
100 FILE *infile; /* Current input file */
101 FILE *outfile; /* Current output file */
103 int aflag, eflag, nflag;
106 static int rval; /* Exit status */
108 static int ispan; /* Whether inplace editing spans across files */
111 * Current file and line number; line numbers restart across compilation
112 * units, but span across input files. The latter is optional if editing
115 const char *fname; /* File name. */
116 const char *outfname; /* Output file name */
117 static char oldfname[PATH_MAX]; /* Old file name (for in-place editing) */
118 static char tmpfname[PATH_MAX]; /* Temporary file name (for in-place editing) */
119 const char *inplace; /* Inplace edit file extension. */
122 static void add_compunit(enum e_cut, char *);
123 static void add_file(char *);
124 static void usage(void);
127 main(int argc, char *argv[])
132 (void) setlocale(LC_ALL, "");
137 while ((c = getopt(argc, argv, "EI:ae:f:i:lnru")) != -1)
139 case 'r': /* Gnu sed compat */
141 rflags = REG_EXTENDED;
145 ispan = 1; /* span across input files */
152 if ((temp_arg = malloc(strlen(optarg) + 2)) == NULL)
154 strcpy(temp_arg, optarg);
155 strcat(temp_arg, "\n");
156 add_compunit(CU_STRING, temp_arg);
160 add_compunit(CU_FILE, optarg);
164 ispan = 0; /* don't span across input files */
167 if(setvbuf(stdout, NULL, _IOLBF, 0) != 0)
168 warnx("setting line buffered output failed");
174 if(setvbuf(stdout, NULL, _IONBF, 0) != 0)
175 warnx("setting unbuffered output failed");
184 /* First usage case; script is the first arg */
185 if (!eflag && !fflag && *argv) {
186 add_compunit(CU_STRING, *argv);
192 /* Continue with first and start second usage */
194 for (; *argv; argv++)
208 (void)fprintf(stderr,
209 "usage: %s script [-Ealnru] [-i extension] [file ...]\n"
210 "\t%s [-Ealnu] [-i extension] [-e script] ... [-f script_file]"
211 " ... [file ...]\n", getprogname(), getprogname());
216 * Like fgets, but go through the chain of compilation units chaining them
217 * together. Empty strings and files are ignored.
220 cu_fgets(char *buf, int n, int *more)
222 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF;
223 static FILE *f; /* Current open file */
224 static char *s; /* Current pointer inside string */
225 static char string_ident[30];
231 if (script == NULL) {
237 switch (script->type) {
239 if ((f = fopen(script->s, "r")) == NULL)
240 err(1, "%s", script->s);
245 if (((size_t)snprintf(string_ident,
246 sizeof(string_ident), "\"%s\"", script->s)) >=
247 sizeof(string_ident) - 1)
248 (void)strcpy(string_ident +
249 sizeof(string_ident) - 6, " ...\"");
250 fname = string_ident;
258 if ((p = fgets(buf, n, f)) != NULL) {
260 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n')
266 script = script->next;
271 if (linenum == 0 && s[0] == '#' && s[1] == 'n')
285 if (s == script->s) {
286 script = script->next;
289 script = script->next;
314 * Like fgets, but go through the list of files chaining them together.
315 * Set len to the length of the line.
318 mf_fgets(SPACE *sp, enum e_spflag spflag)
322 char *dirbuf, *basebuf;
323 static char *p = NULL;
324 static size_t plen = 0;
326 static int firstfile;
328 if (infile == NULL) {
330 if (files->fname == NULL) {
332 errx(1, "-I or -i may not be used with stdin");
342 if (infile != NULL && (c = getc(infile)) != EOF && !quit) {
343 (void)ungetc(c, infile);
346 /* If we are here then either eof or no files are open yet */
347 if (infile == stdin) {
351 if (infile != NULL) {
353 if (*oldfname != '\0') {
354 /* if there was a backup file, remove it */
357 * Backup the original. Note that hard links
358 * are not supported on all filesystems.
360 if ((link(fname, oldfname) != 0) &&
361 (rename(fname, oldfname) != 0)) {
369 if (*tmpfname != '\0') {
370 if (outfile != NULL && outfile != stdout)
371 if (fclose(outfile) != 0) {
377 if (rename(tmpfname, fname) != 0) {
378 /* this should not happen really! */
395 fname = files->fname;
396 if (inplace != NULL) {
397 if (lstat(fname, &sb) != 0)
399 if (!S_ISREG(sb.st_mode))
400 errx(1, "%s: %s %s", fname,
401 "in-place editing only",
402 "works for regular files");
403 if (*inplace != '\0') {
404 strlcpy(oldfname, fname,
406 len = strlcat(oldfname, inplace,
408 if (len > (ssize_t)sizeof(oldfname))
409 errx(1, "%s: name too long", fname);
411 if ((dirbuf = strdup(fname)) == NULL ||
412 (basebuf = strdup(fname)) == NULL)
414 len = snprintf(tmpfname, sizeof(tmpfname),
415 "%s/.!%ld!%s", dirname(dirbuf), (long)getpid(),
419 if (len >= (ssize_t)sizeof(tmpfname))
420 errx(1, "%s: name too long", fname);
422 if (outfile != NULL && outfile != stdout)
424 if ((outfile = fopen(tmpfname, "w")) == NULL)
426 fchown(fileno(outfile), sb.st_uid, sb.st_gid);
427 fchmod(fileno(outfile), sb.st_mode & ALLPERMS);
437 if ((infile = fopen(fname, "r")) == NULL) {
444 * We are here only when infile is open and we still have something
447 * Use getline() so that we can handle essentially infinite input
448 * data. The p and plen are static so each invocation gives
449 * getline() the same buffer which is expanded as needed.
451 len = getline(&p, &plen, infile);
454 if (len != 0 && p[len - 1] == '\n') {
455 sp->append_newline = 1;
457 } else if (!lastline()) {
458 sp->append_newline = 1;
460 sp->append_newline = 0;
462 cspace(sp, p, len, spflag);
470 * Add a compilation unit to the linked list
473 add_compunit(enum e_cut type, char *s)
475 struct s_compunit *cu;
477 if ((cu = malloc(sizeof(struct s_compunit))) == NULL)
483 cu_nextp = &cu->next;
487 * Add a file to the linked list
494 if ((fp = malloc(sizeof(struct s_flist))) == NULL)
499 fl_nextp = &fp->next;
503 next_files_have_lines(void)
505 struct s_flist *file;
510 while ((file = file->next) != NULL) {
511 if ((file_fd = fopen(file->fname, "r")) == NULL)
514 if ((ch = getc(file_fd)) != EOF) {
516 * This next file has content, therefore current
517 * file doesn't contains the last line.
537 (inplace == NULL || ispan) &&
538 next_files_have_lines());
540 if ((ch = getc(infile)) == EOF) {
542 (inplace == NULL || ispan) &&
543 next_files_have_lines());