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1.1 deraadt 1: /*-
2: * Copyright (c) 1992 Diomidis Spinellis.
3: * Copyright (c) 1992, 1993
4: * The Regents of the University of California. All rights reserved.
5: *
6: * This code is derived from software contributed to Berkeley by
7: * Diomidis Spinellis of Imperial College, University of London.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
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.
24: *
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
35: * SUCH DAMAGE.
36: */
37:
38: #ifndef lint
39: static char copyright[] =
40: "@(#) Copyright (c) 1992, 1993\n\
41: The Regents of the University of California. All rights reserved.\n";
42: #endif /* not lint */
43:
44: #ifndef lint
45: /* from: static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; */
46: static char *rcsid = "$Id: main.c,v 1.7 1995/02/23 17:25:23 jtc Exp $";
47: #endif /* not lint */
48:
49: #include <sys/types.h>
50:
51: #include <ctype.h>
52: #include <errno.h>
53: #include <fcntl.h>
54: #include <regex.h>
55: #include <stddef.h>
56: #include <stdio.h>
57: #include <stdlib.h>
58: #include <string.h>
59: #include <unistd.h>
60:
61: #include "defs.h"
62: #include "extern.h"
63:
64: /*
65: * Linked list of units (strings and files) to be compiled
66: */
67: struct s_compunit {
68: struct s_compunit *next;
69: enum e_cut {CU_FILE, CU_STRING} type;
70: char *s; /* Pointer to string or fname */
71: };
72:
73: /*
74: * Linked list pointer to compilation units and pointer to current
75: * next pointer.
76: */
77: static struct s_compunit *script, **cu_nextp = &script;
78:
79: /*
80: * Linked list of files to be processed
81: */
82: struct s_flist {
83: char *fname;
84: struct s_flist *next;
85: };
86:
87: /*
88: * Linked list pointer to files and pointer to current
89: * next pointer.
90: */
91: static struct s_flist *files, **fl_nextp = &files;
92:
93: int aflag, eflag, nflag;
94:
95: /*
96: * Current file and line number; line numbers restart across compilation
97: * units, but span across input files.
98: */
99: char *fname; /* File name. */
100: u_long linenum;
101: int lastline; /* TRUE on the last line of the last file */
102:
103: static void add_compunit __P((enum e_cut, char *));
104: static void add_file __P((char *));
105:
106: int
107: main(argc, argv)
108: int argc;
109: char *argv[];
110: {
111: int c, fflag;
112:
113: fflag = 0;
114: while ((c = getopt(argc, argv, "ae:f:n")) != EOF)
115: switch (c) {
116: case 'a':
117: aflag = 1;
118: break;
119: case 'e':
120: eflag = 1;
121: add_compunit(CU_STRING, optarg);
122: break;
123: case 'f':
124: fflag = 1;
125: add_compunit(CU_FILE, optarg);
126: break;
127: case 'n':
128: nflag = 1;
129: break;
130: default:
131: case '?':
132: (void)fprintf(stderr,
133: "usage:\tsed script [-an] [file ...]\n\tsed [-an] [-e script] ... [-f script_file] ... [file ...]\n");
134: exit(1);
135: }
136: argc -= optind;
137: argv += optind;
138:
139: /* First usage case; script is the first arg */
140: if (!eflag && !fflag && *argv) {
141: add_compunit(CU_STRING, *argv);
142: argv++;
143: }
144:
145: compile();
146:
147: /* Continue with first and start second usage */
148: if (*argv)
149: for (; *argv; argv++)
150: add_file(*argv);
151: else
152: add_file(NULL);
153: process();
154: cfclose(prog, NULL);
155: if (fclose(stdout))
156: err(FATAL, "stdout: %s", strerror(errno));
157: exit (0);
158: }
159:
160: /*
161: * Like fgets, but go through the chain of compilation units chaining them
162: * together. Empty strings and files are ignored.
163: */
164: char *
165: cu_fgets(buf, n)
166: char *buf;
167: int n;
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];
173: char *p;
174:
175: again:
176: switch (state) {
177: case ST_EOF:
178: if (script == NULL)
179: return (NULL);
180: linenum = 0;
181: switch (script->type) {
182: case CU_FILE:
183: if ((f = fopen(script->s, "r")) == NULL)
184: err(FATAL,
185: "%s: %s", script->s, strerror(errno));
186: fname = script->s;
187: state = ST_FILE;
188: goto again;
189: case CU_STRING:
190: if ((snprintf(string_ident,
191: sizeof(string_ident), "\"%s\"", script->s)) >=
192: sizeof(string_ident) - 1)
193: (void)strcpy(string_ident +
194: sizeof(string_ident) - 6, " ...\"");
195: fname = string_ident;
196: s = script->s;
197: state = ST_STRING;
198: goto again;
199: }
200: case ST_FILE:
201: if ((p = fgets(buf, n, f)) != NULL) {
202: linenum++;
203: if (linenum == 1 && buf[0] == '#' && buf[1] == 'n')
204: nflag = 1;
205: return (p);
206: }
207: script = script->next;
208: (void)fclose(f);
209: state = ST_EOF;
210: goto again;
211: case ST_STRING:
212: if (linenum == 0 && s[0] == '#' && s[1] == 'n')
213: nflag = 1;
214: p = buf;
215: for (;;) {
216: if (n-- <= 1) {
217: *p = '\0';
218: linenum++;
219: return (buf);
220: }
221: switch (*s) {
222: case '\0':
223: state = ST_EOF;
224: if (s == script->s) {
225: script = script->next;
226: goto again;
227: } else {
228: script = script->next;
229: *p = '\0';
230: linenum++;
231: return (buf);
232: }
233: case '\n':
234: *p++ = '\n';
235: *p = '\0';
236: s++;
237: linenum++;
238: return (buf);
239: default:
240: *p++ = *s++;
241: }
242: }
243: }
244: /* NOTREACHED */
245: }
246:
247: /*
248: * Like fgets, but go through the list of files chaining them together.
249: * Set len to the length of the line.
250: */
251: int
252: mf_fgets(sp, spflag)
253: SPACE *sp;
254: enum e_spflag spflag;
255: {
256: static FILE *f; /* Current open file */
257: size_t len;
258: char c, *p;
259:
260: if (f == NULL)
261: /* Advance to first non-empty file */
262: for (;;) {
263: if (files == NULL) {
264: lastline = 1;
265: return (0);
266: }
267: if (files->fname == NULL) {
268: f = stdin;
269: fname = "stdin";
270: } else {
271: fname = files->fname;
272: if ((f = fopen(fname, "r")) == NULL)
273: err(FATAL, "%s: %s",
274: fname, strerror(errno));
275: }
276: if ((c = getc(f)) != EOF) {
277: (void)ungetc(c, f);
278: break;
279: }
280: (void)fclose(f);
281: files = files->next;
282: }
283:
284: if (lastline) {
285: sp->len = 0;
286: return (0);
287: }
288:
289: /*
290: * Use fgetln so that we can handle essentially infinite input data.
291: * Can't use the pointer into the stdio buffer as the process space
292: * because the ungetc() can cause it to move.
293: */
294: p = fgetln(f, &len);
295: if (ferror(f))
296: err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO));
297: cspace(sp, p, len, spflag);
298:
299: linenum++;
300: /* Advance to next non-empty file */
301: while ((c = getc(f)) == EOF) {
302: (void)fclose(f);
303: files = files->next;
304: if (files == NULL) {
305: lastline = 1;
306: return (1);
307: }
308: if (files->fname == NULL) {
309: f = stdin;
310: fname = "stdin";
311: } else {
312: fname = files->fname;
313: if ((f = fopen(fname, "r")) == NULL)
314: err(FATAL, "%s: %s", fname, strerror(errno));
315: }
316: }
317: (void)ungetc(c, f);
318: return (1);
319: }
320:
321: /*
322: * Add a compilation unit to the linked list
323: */
324: static void
325: add_compunit(type, s)
326: enum e_cut type;
327: char *s;
328: {
329: struct s_compunit *cu;
330:
331: cu = xmalloc(sizeof(struct s_compunit));
332: cu->type = type;
333: cu->s = s;
334: cu->next = NULL;
335: *cu_nextp = cu;
336: cu_nextp = &cu->next;
337: }
338:
339: /*
340: * Add a file to the linked list
341: */
342: static void
343: add_file(s)
344: char *s;
345: {
346: struct s_flist *fp;
347:
348: fp = xmalloc(sizeof(struct s_flist));
349: fp->next = NULL;
350: *fl_nextp = fp;
351: fp->fname = s;
352: fl_nextp = &fp->next;
353: }