/* $OpenBSD: main.c,v 1.9 2003/06/10 22:20:50 deraadt Exp $ */ /*- * Copyright (c) 1992 Diomidis Spinellis. * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Diomidis Spinellis of Imperial College, University of London. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1992, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint /* from: static char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; */ static char *rcsid = "$OpenBSD: main.c,v 1.9 2003/06/10 22:20:50 deraadt Exp $"; #endif /* not lint */ #include <sys/types.h> #include <ctype.h> #include <errno.h> #include <fcntl.h> #include <regex.h> #include <stddef.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include "defs.h" #include "extern.h" /* * Linked list of units (strings and files) to be compiled */ struct s_compunit { struct s_compunit *next; enum e_cut {CU_FILE, CU_STRING} type; char *s; /* Pointer to string or fname */ }; /* * Linked list pointer to compilation units and pointer to current * next pointer. */ static struct s_compunit *script, **cu_nextp = &script; /* * Linked list of files to be processed */ struct s_flist { char *fname; struct s_flist *next; }; /* * Linked list pointer to files and pointer to current * next pointer. */ static struct s_flist *files, **fl_nextp = &files; int aflag, eflag, nflag; /* * Current file and line number; line numbers restart across compilation * units, but span across input files. */ char *fname; /* File name. */ u_long linenum; int lastline; /* TRUE on the last line of the last file */ static void add_compunit(enum e_cut, char *); static void add_file(char *); int main(int argc, char *argv[]) { int c, fflag; fflag = 0; while ((c = getopt(argc, argv, "ae:f:n")) != -1) switch (c) { case 'a': aflag = 1; break; case 'e': eflag = 1; add_compunit(CU_STRING, optarg); break; case 'f': fflag = 1; add_compunit(CU_FILE, optarg); break; case 'n': nflag = 1; break; default: case '?': (void)fprintf(stderr, "usage:\tsed script [-an] [file ...]\n\tsed [-an] [-e script] ... [-f script_file] ... [file ...]\n"); exit(1); } argc -= optind; argv += optind; /* First usage case; script is the first arg */ if (!eflag && !fflag && *argv) { add_compunit(CU_STRING, *argv); argv++; } compile(); /* Continue with first and start second usage */ if (*argv) for (; *argv; argv++) add_file(*argv); else add_file(NULL); process(); cfclose(prog, NULL); if (fclose(stdout)) err(FATAL, "stdout: %s", strerror(errno)); exit (0); } /* * Like fgets, but go through the chain of compilation units chaining them * together. Empty strings and files are ignored. */ char * cu_fgets(char *buf, int n) { static enum {ST_EOF, ST_FILE, ST_STRING} state = ST_EOF; static FILE *f; /* Current open file */ static char *s; /* Current pointer inside string */ static char string_ident[30]; char *p; again: switch (state) { case ST_EOF: if (script == NULL) return (NULL); linenum = 0; switch (script->type) { case CU_FILE: if ((f = fopen(script->s, "r")) == NULL) err(FATAL, "%s: %s", script->s, strerror(errno)); fname = script->s; state = ST_FILE; goto again; case CU_STRING: if ((snprintf(string_ident, sizeof(string_ident), "\"%s\"", script->s)) >= sizeof(string_ident)) strlcpy(string_ident + sizeof(string_ident) - 6, " ...\"", 5); fname = string_ident; s = script->s; state = ST_STRING; goto again; } case ST_FILE: if ((p = fgets(buf, n, f)) != NULL) { linenum++; if (linenum == 1 && buf[0] == '#' && buf[1] == 'n') nflag = 1; return (p); } script = script->next; (void)fclose(f); state = ST_EOF; goto again; case ST_STRING: if (linenum == 0 && s[0] == '#' && s[1] == 'n') nflag = 1; p = buf; for (;;) { if (n-- <= 1) { *p = '\0'; linenum++; return (buf); } switch (*s) { case '\0': state = ST_EOF; if (s == script->s) { script = script->next; goto again; } else { script = script->next; *p = '\0'; linenum++; return (buf); } case '\n': *p++ = '\n'; *p = '\0'; s++; linenum++; return (buf); default: *p++ = *s++; } } } /* NOTREACHED */ } /* * Like fgets, but go through the list of files chaining them together. * Set len to the length of the line. */ int mf_fgets(SPACE *sp, enum e_spflag spflag) { static FILE *f; /* Current open file */ size_t len; char *p; int c; if (f == NULL) /* Advance to first non-empty file */ for (;;) { if (files == NULL) { lastline = 1; return (0); } if (files->fname == NULL) { f = stdin; fname = "stdin"; } else { fname = files->fname; if ((f = fopen(fname, "r")) == NULL) err(FATAL, "%s: %s", fname, strerror(errno)); } if ((c = getc(f)) != EOF) { (void)ungetc(c, f); break; } (void)fclose(f); files = files->next; } if (lastline) { sp->len = 0; return (0); } /* * Use fgetln so that we can handle essentially infinite input data. * Can't use the pointer into the stdio buffer as the process space * because the ungetc() can cause it to move. */ p = fgetln(f, &len); if (ferror(f)) err(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO)); cspace(sp, p, len, spflag); linenum++; /* Advance to next non-empty file */ while ((c = getc(f)) == EOF) { (void)fclose(f); files = files->next; if (files == NULL) { lastline = 1; return (1); } if (files->fname == NULL) { f = stdin; fname = "stdin"; } else { fname = files->fname; if ((f = fopen(fname, "r")) == NULL) err(FATAL, "%s: %s", fname, strerror(errno)); } } (void)ungetc(c, f); return (1); } /* * Add a compilation unit to the linked list */ static void add_compunit(enum e_cut type, char *s) { struct s_compunit *cu; cu = xmalloc(sizeof(struct s_compunit)); cu->type = type; cu->s = s; cu->next = NULL; *cu_nextp = cu; cu_nextp = &cu->next; } /* * Add a file to the linked list */ static void add_file(char *s) { struct s_flist *fp; fp = xmalloc(sizeof(struct s_flist)); fp->next = NULL; *fl_nextp = fp; fp->fname = s; fl_nextp = &fp->next; }