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1.17 ! deraadt 1: /* $OpenBSD: main.c,v 1.16 2009/08/07 03:30:56 djm Exp $ */
1.3 deraadt 2:
1.1 deraadt 3: /*-
4: * Copyright (c) 1992 Diomidis Spinellis.
5: * Copyright (c) 1992, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Diomidis Spinellis of Imperial College, University of London.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
1.8 millert 19: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #include <sys/types.h>
37:
38: #include <ctype.h>
39: #include <errno.h>
40: #include <fcntl.h>
1.15 millert 41: #include <limits.h>
1.1 deraadt 42: #include <regex.h>
43: #include <stddef.h>
44: #include <stdio.h>
45: #include <stdlib.h>
46: #include <string.h>
47: #include <unistd.h>
48:
49: #include "defs.h"
50: #include "extern.h"
51:
52: /*
53: * Linked list of units (strings and files) to be compiled
54: */
55: struct s_compunit {
56: struct s_compunit *next;
57: enum e_cut {CU_FILE, CU_STRING} type;
58: char *s; /* Pointer to string or fname */
59: };
60:
61: /*
62: * Linked list pointer to compilation units and pointer to current
63: * next pointer.
64: */
65: static struct s_compunit *script, **cu_nextp = &script;
66:
67: /*
68: * Linked list of files to be processed
69: */
70: struct s_flist {
71: char *fname;
72: struct s_flist *next;
73: };
74:
75: /*
76: * Linked list pointer to files and pointer to current
77: * next pointer.
78: */
79: static struct s_flist *files, **fl_nextp = &files;
80:
1.16 djm 81: int Eflag, aflag, eflag, nflag;
1.1 deraadt 82:
83: /*
84: * Current file and line number; line numbers restart across compilation
85: * units, but span across input files.
86: */
87: char *fname; /* File name. */
88: u_long linenum;
89: int lastline; /* TRUE on the last line of the last file */
90:
1.6 millert 91: static void add_compunit(enum e_cut, char *);
92: static void add_file(char *);
1.1 deraadt 93:
94: int
1.9 deraadt 95: main(int argc, char *argv[])
1.1 deraadt 96: {
97: int c, fflag;
98:
99: fflag = 0;
1.16 djm 100: while ((c = getopt(argc, argv, "Eae:f:nru")) != -1)
1.1 deraadt 101: switch (c) {
1.16 djm 102: case 'E':
103: case 'r':
104: Eflag = 1;
105: break;
1.1 deraadt 106: case 'a':
107: aflag = 1;
108: break;
109: case 'e':
110: eflag = 1;
111: add_compunit(CU_STRING, optarg);
112: break;
113: case 'f':
114: fflag = 1;
115: add_compunit(CU_FILE, optarg);
116: break;
117: case 'n':
118: nflag = 1;
119: break;
1.11 ray 120: case 'u':
121: setlinebuf(stdout);
122: break;
1.1 deraadt 123: default:
124: case '?':
125: (void)fprintf(stderr,
1.16 djm 126: "usage: sed [-aEnru] command [file ...]\n"
127: " sed [-aEnru] [-e command] [-f command_file] [file ...]\n");
1.1 deraadt 128: exit(1);
129: }
130: argc -= optind;
131: argv += optind;
132:
133: /* First usage case; script is the first arg */
134: if (!eflag && !fflag && *argv) {
135: add_compunit(CU_STRING, *argv);
136: argv++;
137: }
138:
139: compile();
140:
141: /* Continue with first and start second usage */
142: if (*argv)
143: for (; *argv; argv++)
144: add_file(*argv);
145: else
146: add_file(NULL);
147: process();
148: cfclose(prog, NULL);
149: if (fclose(stdout))
150: err(FATAL, "stdout: %s", strerror(errno));
151: exit (0);
152: }
153:
154: /*
155: * Like fgets, but go through the chain of compilation units chaining them
156: * together. Empty strings and files are ignored.
157: */
158: char *
1.15 millert 159: cu_fgets(char **outbuf, size_t *outsize)
1.1 deraadt 160: {
161: static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF;
162: static FILE *f; /* Current open file */
163: static char *s; /* Current pointer inside string */
164: static char string_ident[30];
1.13 millert 165: size_t len;
1.1 deraadt 166: char *p;
167:
1.15 millert 168: if (*outbuf == NULL)
169: *outsize = 0;
170:
1.1 deraadt 171: again:
172: switch (state) {
173: case ST_EOF:
174: if (script == NULL)
175: return (NULL);
176: linenum = 0;
177: switch (script->type) {
178: case CU_FILE:
179: if ((f = fopen(script->s, "r")) == NULL)
180: err(FATAL,
181: "%s: %s", script->s, strerror(errno));
182: fname = script->s;
183: state = ST_FILE;
184: goto again;
185: case CU_STRING:
186: if ((snprintf(string_ident,
187: sizeof(string_ident), "\"%s\"", script->s)) >=
1.5 millert 188: sizeof(string_ident))
1.7 deraadt 189: strlcpy(string_ident +
190: sizeof(string_ident) - 6, " ...\"", 5);
1.1 deraadt 191: fname = string_ident;
192: s = script->s;
193: state = ST_STRING;
194: goto again;
195: }
196: case ST_FILE:
1.13 millert 197: if ((p = fgetln(f, &len)) != NULL) {
1.1 deraadt 198: linenum++;
1.15 millert 199: if (len >= *outsize) {
1.13 millert 200: free(*outbuf);
1.15 millert 201: *outsize = ROUNDLEN(len + 1);
202: *outbuf = xmalloc(*outsize);
1.13 millert 203: }
204: memcpy(*outbuf, p, len);
205: (*outbuf)[len] = '\0';
206: if (linenum == 1 && p[0] == '#' && p[1] == 'n')
1.1 deraadt 207: nflag = 1;
1.13 millert 208: return (*outbuf);
1.1 deraadt 209: }
210: script = script->next;
211: (void)fclose(f);
212: state = ST_EOF;
213: goto again;
214: case ST_STRING:
215: if (linenum == 0 && s[0] == '#' && s[1] == 'n')
216: nflag = 1;
1.13 millert 217: p = *outbuf;
1.15 millert 218: len = *outsize;
1.1 deraadt 219: for (;;) {
1.15 millert 220: if (len <= 1) {
221: *outbuf = xrealloc(*outbuf,
222: *outsize + _POSIX2_LINE_MAX);
223: p = *outbuf + *outsize - len;
224: len += _POSIX2_LINE_MAX;
225: *outsize += _POSIX2_LINE_MAX;
1.1 deraadt 226: }
227: switch (*s) {
228: case '\0':
229: state = ST_EOF;
230: if (s == script->s) {
231: script = script->next;
232: goto again;
233: } else {
234: script = script->next;
235: *p = '\0';
236: linenum++;
1.13 millert 237: return (*outbuf);
1.1 deraadt 238: }
239: case '\n':
240: *p++ = '\n';
241: *p = '\0';
242: s++;
243: linenum++;
1.13 millert 244: return (*outbuf);
1.1 deraadt 245: default:
246: *p++ = *s++;
1.15 millert 247: len--;
1.1 deraadt 248: }
249: }
250: }
251: /* NOTREACHED */
252: }
253:
254: /*
255: * Like fgets, but go through the list of files chaining them together.
256: * Set len to the length of the line.
257: */
258: int
1.9 deraadt 259: mf_fgets(SPACE *sp, enum e_spflag spflag)
1.1 deraadt 260: {
261: static FILE *f; /* Current open file */
262: size_t len;
1.2 deraadt 263: char *p;
264: int c;
1.1 deraadt 265:
266: if (f == NULL)
267: /* Advance to first non-empty file */
268: for (;;) {
269: if (files == NULL) {
270: lastline = 1;
271: return (0);
272: }
273: if (files->fname == NULL) {
274: f = stdin;
275: fname = "stdin";
276: } else {
277: fname = files->fname;
278: if ((f = fopen(fname, "r")) == NULL)
279: err(FATAL, "%s: %s",
280: fname, strerror(errno));
281: }
282: if ((c = getc(f)) != EOF) {
283: (void)ungetc(c, f);
284: break;
285: }
286: (void)fclose(f);
287: files = files->next;
288: }
289:
290: if (lastline) {
291: sp->len = 0;
292: return (0);
293: }
294:
295: /*
296: * Use fgetln so that we can handle essentially infinite input data.
297: * Can't use the pointer into the stdio buffer as the process space
298: * because the ungetc() can cause it to move.
299: */
300: p = fgetln(f, &len);
301: if (ferror(f))
302: err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO));
303: cspace(sp, p, len, spflag);
304:
305: linenum++;
306: /* Advance to next non-empty file */
307: while ((c = getc(f)) == EOF) {
308: (void)fclose(f);
309: files = files->next;
310: if (files == NULL) {
311: lastline = 1;
312: return (1);
313: }
314: if (files->fname == NULL) {
315: f = stdin;
316: fname = "stdin";
317: } else {
318: fname = files->fname;
319: if ((f = fopen(fname, "r")) == NULL)
320: err(FATAL, "%s: %s", fname, strerror(errno));
321: }
322: }
323: (void)ungetc(c, f);
324: return (1);
325: }
326:
327: /*
328: * Add a compilation unit to the linked list
329: */
330: static void
1.9 deraadt 331: add_compunit(enum e_cut type, char *s)
1.1 deraadt 332: {
333: struct s_compunit *cu;
334:
335: cu = xmalloc(sizeof(struct s_compunit));
336: cu->type = type;
337: cu->s = s;
338: cu->next = NULL;
339: *cu_nextp = cu;
340: cu_nextp = &cu->next;
341: }
342:
343: /*
344: * Add a file to the linked list
345: */
346: static void
1.9 deraadt 347: add_file(char *s)
1.1 deraadt 348: {
349: struct s_flist *fp;
350:
351: fp = xmalloc(sizeof(struct s_flist));
352: fp->next = NULL;
353: *fl_nextp = fp;
354: fp->fname = s;
355: fl_nextp = &fp->next;
356: }