2 * Copyright (c) 1992 Diomidis Spinellis.
3 * Copyright (c) 1992, 1993
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
7 * Diomidis Spinellis of Imperial College, University of London.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * @(#) Copyright (c) 1992, 1993 The Regents of the University of California. All rights reserved.
38 * @(#)main.c 8.2 (Berkeley) 1/3/94
39 * $FreeBSD: src/usr.bin/sed/main.c,v 1.9.2.7 2002/08/06 10:03:29 fanf Exp $
40 * $DragonFly: src/usr.bin/sed/main.c,v 1.3 2003/10/04 20:36:50 hmp Exp $
43 #include <sys/types.h>
45 #include <sys/param.h>
63 * Linked list of units (strings and files) to be compiled
66 struct s_compunit *next;
67 enum e_cut {CU_FILE, CU_STRING} type;
68 char *s; /* Pointer to string or fname */
72 * Linked list pointer to compilation units and pointer to current
75 static struct s_compunit *script, **cu_nextp = &script;
78 * Linked list of files to be processed
86 * Linked list pointer to files and pointer to current
89 static struct s_flist *files, **fl_nextp = &files;
91 static FILE *curfile; /* Current open file */
93 int aflag, eflag, nflag;
95 static int rval; /* Exit status */
98 * Current file and line number; line numbers restart across compilation
99 * units, but span across input files.
101 const char *fname; /* File name. */
102 const char *inplace; /* Inplace edit file extension. */
105 static void add_compunit(enum e_cut, char *);
106 static void add_file(char *);
107 static int inplace_edit(char **);
108 static void usage(void);
111 main(int argc, char **argv)
116 (void) setlocale(LC_ALL, "");
121 while ((c = getopt(argc, argv, "Eae:f:i:n")) != -1)
124 rflags = REG_EXTENDED;
131 if ((temp_arg = malloc(strlen(optarg) + 2)) == NULL)
133 strcpy(temp_arg, optarg);
134 strcat(temp_arg, "\n");
135 add_compunit(CU_STRING, temp_arg);
139 add_compunit(CU_FILE, optarg);
154 /* First usage case; script is the first arg */
155 if (!eflag && !fflag && *argv) {
156 add_compunit(CU_STRING, *argv);
162 /* Continue with first and start second usage */
164 for (; *argv; argv++)
178 (void)fprintf(stderr, "%s\n%s\n",
179 "usage: sed script [-Ean] [-i extension] [file ...]",
180 " sed [-an] [-i extension] [-e script] ... [-f script_file] ... [file ...]");
185 * Like fgets, but go through the chain of compilation units chaining them
186 * together. Empty strings and files are ignored.
189 cu_fgets(char *buf, int n, int *more)
191 static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF;
192 static FILE *f; /* Current open file */
193 static char *s; /* Current pointer inside string */
194 static char string_ident[30];
200 if (script == NULL) {
206 switch (script->type) {
208 if ((f = fopen(script->s, "r")) == NULL)
209 err(1, "%s", script->s);
214 if ((snprintf(string_ident,
215 sizeof(string_ident), "\"%s\"", script->s)) >=
216 sizeof(string_ident) - 1)
217 (void)strcpy(string_ident +
218 sizeof(string_ident) - 6, " ...\"");
219 fname = string_ident;
225 if ((p = fgets(buf, n, f)) != NULL) {
227 if (linenum == 1 && buf[0] == '#' && buf[1] == 'n')
233 script = script->next;
238 if (linenum == 0 && s[0] == '#' && s[1] == 'n')
252 if (s == script->s) {
253 script = script->next;
256 script = script->next;
281 * Like fgets, but go through the list of files chaining them together.
282 * Set len to the length of the line.
285 mf_fgets(SPACE *sp, enum e_spflag spflag)
290 static int firstfile;
292 if (curfile == NULL) {
294 if (files->fname == NULL) {
296 errx(1, "-i may not be used with stdin");
304 if (curfile != NULL && (c = getc(curfile)) != EOF) {
305 (void)ungetc(c, curfile);
308 /* If we are here then either eof or no files are open yet */
309 if (curfile == stdin) {
313 if (curfile != NULL) {
316 if (firstfile == 0) {
324 if (inplace != NULL) {
325 if (inplace_edit(&files->fname) == -1)
328 fname = files->fname;
329 if ((curfile = fopen(fname, "r")) == NULL) {
334 if (inplace != NULL && *inplace == '\0')
338 * We are here only when curfile is open and we still have something
341 * Use fgetln so that we can handle essentially infinite input data.
342 * Can't use the pointer into the stdio buffer as the process space
343 * because the ungetc() can cause it to move.
345 p = fgetln(curfile, &len);
347 errx(1, "%s: %s", fname, strerror(errno ? errno : EIO));
348 if (len != 0 && p[len - 1] == '\n')
350 cspace(sp, p, len, spflag);
358 * Add a compilation unit to the linked list
361 add_compunit(enum e_cut type, char *s)
363 struct s_compunit *cu;
365 if ((cu = malloc(sizeof(struct s_compunit))) == NULL)
371 cu_nextp = &cu->next;
375 * Add a file to the linked list
382 if ((fp = malloc(sizeof(struct s_flist))) == NULL)
387 fl_nextp = &fp->next;
391 * Modify a pointer to a filename for inplace editing and reopen stdout
394 inplace_edit(char **filename)
397 char backup[MAXPATHLEN];
399 if (lstat(*filename, &orig) == -1)
401 if ((orig.st_mode & S_IFREG) == 0) {
402 warnx("cannot inplace edit %s, not a regular file", *filename);
406 if (*inplace == '\0') {
408 * This is a bit of a hack: we use mkstemp() to avoid the
409 * mktemp() link-time warning, although mktemp() would fit in
410 * this context much better. We're only interested in getting
411 * a name for use in the rename(); there aren't any security
412 * issues here that don't already exist in relation to the
413 * original file and its directory.
416 strlcpy(backup, *filename, sizeof(backup));
417 strlcat(backup, ".XXXXXXXXXX", sizeof(backup));
418 fd = mkstemp(backup);
420 errx(1, "could not create backup of %s", *filename);
424 strlcpy(backup, *filename, sizeof(backup));
425 strlcat(backup, inplace, sizeof(backup));
428 if (rename(*filename, backup) == -1)
429 err(1, "rename(\"%s\", \"%s\")", *filename, backup);
430 if (freopen(*filename, "w", stdout) == NULL)
431 err(1, "open(\"%s\")", *filename);
432 if (fchmod(fileno(stdout), orig.st_mode) == -1)
433 err(1, "chmod(\"%s\")", *filename);
434 *filename = strdup(backup);
435 if (*filename == NULL)
445 if (files->next != NULL)
447 if ((ch = getc(curfile)) == EOF)