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1.16 ! djm 1: /* $OpenBSD: main.c,v 1.15 2008/10/16 16:34:32 millert 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: #ifndef lint
1.10 tedu 37: static const char copyright[] =
1.1 deraadt 38: "@(#) Copyright (c) 1992, 1993\n\
39: The Regents of the University of California. All rights reserved.\n";
40: /* from: static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; */
1.16 ! djm 41: static const char rcsid[] = "$OpenBSD: main.c,v 1.15 2008/10/16 16:34:32 millert Exp $";
1.1 deraadt 42: #endif /* not lint */
43:
44: #include <sys/types.h>
45:
46: #include <ctype.h>
47: #include <errno.h>
48: #include <fcntl.h>
1.15 millert 49: #include <limits.h>
1.1 deraadt 50: #include <regex.h>
51: #include <stddef.h>
52: #include <stdio.h>
53: #include <stdlib.h>
54: #include <string.h>
55: #include <unistd.h>
56:
57: #include "defs.h"
58: #include "extern.h"
59:
60: /*
61: * Linked list of units (strings and files) to be compiled
62: */
63: struct s_compunit {
64: struct s_compunit *next;
65: enum e_cut {CU_FILE, CU_STRING} type;
66: char *s; /* Pointer to string or fname */
67: };
68:
69: /*
70: * Linked list pointer to compilation units and pointer to current
71: * next pointer.
72: */
73: static struct s_compunit *script, **cu_nextp = &script;
74:
75: /*
76: * Linked list of files to be processed
77: */
78: struct s_flist {
79: char *fname;
80: struct s_flist *next;
81: };
82:
83: /*
84: * Linked list pointer to files and pointer to current
85: * next pointer.
86: */
87: static struct s_flist *files, **fl_nextp = &files;
88:
1.16 ! djm 89: int Eflag, aflag, eflag, nflag;
1.1 deraadt 90:
91: /*
92: * Current file and line number; line numbers restart across compilation
93: * units, but span across input files.
94: */
95: char *fname; /* File name. */
96: u_long linenum;
97: int lastline; /* TRUE on the last line of the last file */
98:
1.6 millert 99: static void add_compunit(enum e_cut, char *);
100: static void add_file(char *);
1.1 deraadt 101:
102: int
1.9 deraadt 103: main(int argc, char *argv[])
1.1 deraadt 104: {
105: int c, fflag;
106:
107: fflag = 0;
1.16 ! djm 108: while ((c = getopt(argc, argv, "Eae:f:nru")) != -1)
1.1 deraadt 109: switch (c) {
1.16 ! djm 110: case 'E':
! 111: case 'r':
! 112: Eflag = 1;
! 113: break;
1.1 deraadt 114: case 'a':
115: aflag = 1;
116: break;
117: case 'e':
118: eflag = 1;
119: add_compunit(CU_STRING, optarg);
120: break;
121: case 'f':
122: fflag = 1;
123: add_compunit(CU_FILE, optarg);
124: break;
125: case 'n':
126: nflag = 1;
127: break;
1.11 ray 128: case 'u':
129: setlinebuf(stdout);
130: break;
1.1 deraadt 131: default:
132: case '?':
133: (void)fprintf(stderr,
1.16 ! djm 134: "usage: sed [-aEnru] command [file ...]\n"
! 135: " sed [-aEnru] [-e command] [-f command_file] [file ...]\n");
1.1 deraadt 136: exit(1);
137: }
138: argc -= optind;
139: argv += optind;
140:
141: /* First usage case; script is the first arg */
142: if (!eflag && !fflag && *argv) {
143: add_compunit(CU_STRING, *argv);
144: argv++;
145: }
146:
147: compile();
148:
149: /* Continue with first and start second usage */
150: if (*argv)
151: for (; *argv; argv++)
152: add_file(*argv);
153: else
154: add_file(NULL);
155: process();
156: cfclose(prog, NULL);
157: if (fclose(stdout))
158: err(FATAL, "stdout: %s", strerror(errno));
159: exit (0);
160: }
161:
162: /*
163: * Like fgets, but go through the chain of compilation units chaining them
164: * together. Empty strings and files are ignored.
165: */
166: char *
1.15 millert 167: cu_fgets(char **outbuf, size_t *outsize)
1.1 deraadt 168: {
169: static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF;
170: static FILE *f; /* Current open file */
171: static char *s; /* Current pointer inside string */
172: static char string_ident[30];
1.13 millert 173: size_t len;
1.1 deraadt 174: char *p;
175:
1.15 millert 176: if (*outbuf == NULL)
177: *outsize = 0;
178:
1.1 deraadt 179: again:
180: switch (state) {
181: case ST_EOF:
182: if (script == NULL)
183: return (NULL);
184: linenum = 0;
185: switch (script->type) {
186: case CU_FILE:
187: if ((f = fopen(script->s, "r")) == NULL)
188: err(FATAL,
189: "%s: %s", script->s, strerror(errno));
190: fname = script->s;
191: state = ST_FILE;
192: goto again;
193: case CU_STRING:
194: if ((snprintf(string_ident,
195: sizeof(string_ident), "\"%s\"", script->s)) >=
1.5 millert 196: sizeof(string_ident))
1.7 deraadt 197: strlcpy(string_ident +
198: sizeof(string_ident) - 6, " ...\"", 5);
1.1 deraadt 199: fname = string_ident;
200: s = script->s;
201: state = ST_STRING;
202: goto again;
203: }
204: case ST_FILE:
1.13 millert 205: if ((p = fgetln(f, &len)) != NULL) {
1.1 deraadt 206: linenum++;
1.15 millert 207: if (len >= *outsize) {
1.13 millert 208: free(*outbuf);
1.15 millert 209: *outsize = ROUNDLEN(len + 1);
210: *outbuf = xmalloc(*outsize);
1.13 millert 211: }
212: memcpy(*outbuf, p, len);
213: (*outbuf)[len] = '\0';
214: if (linenum == 1 && p[0] == '#' && p[1] == 'n')
1.1 deraadt 215: nflag = 1;
1.13 millert 216: return (*outbuf);
1.1 deraadt 217: }
218: script = script->next;
219: (void)fclose(f);
220: state = ST_EOF;
221: goto again;
222: case ST_STRING:
223: if (linenum == 0 && s[0] == '#' && s[1] == 'n')
224: nflag = 1;
1.13 millert 225: p = *outbuf;
1.15 millert 226: len = *outsize;
1.1 deraadt 227: for (;;) {
1.15 millert 228: if (len <= 1) {
229: *outbuf = xrealloc(*outbuf,
230: *outsize + _POSIX2_LINE_MAX);
231: p = *outbuf + *outsize - len;
232: len += _POSIX2_LINE_MAX;
233: *outsize += _POSIX2_LINE_MAX;
1.1 deraadt 234: }
235: switch (*s) {
236: case '\0':
237: state = ST_EOF;
238: if (s == script->s) {
239: script = script->next;
240: goto again;
241: } else {
242: script = script->next;
243: *p = '\0';
244: linenum++;
1.13 millert 245: return (*outbuf);
1.1 deraadt 246: }
247: case '\n':
248: *p++ = '\n';
249: *p = '\0';
250: s++;
251: linenum++;
1.13 millert 252: return (*outbuf);
1.1 deraadt 253: default:
254: *p++ = *s++;
1.15 millert 255: len--;
1.1 deraadt 256: }
257: }
258: }
259: /* NOTREACHED */
260: }
261:
262: /*
263: * Like fgets, but go through the list of files chaining them together.
264: * Set len to the length of the line.
265: */
266: int
1.9 deraadt 267: mf_fgets(SPACE *sp, enum e_spflag spflag)
1.1 deraadt 268: {
269: static FILE *f; /* Current open file */
270: size_t len;
1.2 deraadt 271: char *p;
272: int c;
1.1 deraadt 273:
274: if (f == NULL)
275: /* Advance to first non-empty file */
276: for (;;) {
277: if (files == NULL) {
278: lastline = 1;
279: return (0);
280: }
281: if (files->fname == NULL) {
282: f = stdin;
283: fname = "stdin";
284: } else {
285: fname = files->fname;
286: if ((f = fopen(fname, "r")) == NULL)
287: err(FATAL, "%s: %s",
288: fname, strerror(errno));
289: }
290: if ((c = getc(f)) != EOF) {
291: (void)ungetc(c, f);
292: break;
293: }
294: (void)fclose(f);
295: files = files->next;
296: }
297:
298: if (lastline) {
299: sp->len = 0;
300: return (0);
301: }
302:
303: /*
304: * Use fgetln so that we can handle essentially infinite input data.
305: * Can't use the pointer into the stdio buffer as the process space
306: * because the ungetc() can cause it to move.
307: */
308: p = fgetln(f, &len);
309: if (ferror(f))
310: err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO));
311: cspace(sp, p, len, spflag);
312:
313: linenum++;
314: /* Advance to next non-empty file */
315: while ((c = getc(f)) == EOF) {
316: (void)fclose(f);
317: files = files->next;
318: if (files == NULL) {
319: lastline = 1;
320: return (1);
321: }
322: if (files->fname == NULL) {
323: f = stdin;
324: fname = "stdin";
325: } else {
326: fname = files->fname;
327: if ((f = fopen(fname, "r")) == NULL)
328: err(FATAL, "%s: %s", fname, strerror(errno));
329: }
330: }
331: (void)ungetc(c, f);
332: return (1);
333: }
334:
335: /*
336: * Add a compilation unit to the linked list
337: */
338: static void
1.9 deraadt 339: add_compunit(enum e_cut type, char *s)
1.1 deraadt 340: {
341: struct s_compunit *cu;
342:
343: cu = xmalloc(sizeof(struct s_compunit));
344: cu->type = type;
345: cu->s = s;
346: cu->next = NULL;
347: *cu_nextp = cu;
348: cu_nextp = &cu->next;
349: }
350:
351: /*
352: * Add a file to the linked list
353: */
354: static void
1.9 deraadt 355: add_file(char *s)
1.1 deraadt 356: {
357: struct s_flist *fp;
358:
359: fp = xmalloc(sizeof(struct s_flist));
360: fp->next = NULL;
361: *fl_nextp = fp;
362: fp->fname = s;
363: fl_nextp = &fp->next;
364: }