diff options
author | Kiyoshi Aman <kiyoshi.aman+adelie@gmail.com> | 2019-02-01 22:55:37 +0000 |
---|---|---|
committer | Kiyoshi Aman <kiyoshi.aman+adelie@gmail.com> | 2019-02-03 18:22:05 -0600 |
commit | 5b57d28ffb6e1ef86b50f7d05d977826eae89bfe (patch) | |
tree | 154a22fe556b49e6927197336f8bf91b12eacd5e /usr.bin/sed/main.c | |
download | userland-5b57d28ffb6e1ef86b50f7d05d977826eae89bfe.tar.gz userland-5b57d28ffb6e1ef86b50f7d05d977826eae89bfe.tar.bz2 userland-5b57d28ffb6e1ef86b50f7d05d977826eae89bfe.tar.xz userland-5b57d28ffb6e1ef86b50f7d05d977826eae89bfe.zip |
initial population
Diffstat (limited to 'usr.bin/sed/main.c')
-rw-r--r-- | usr.bin/sed/main.c | 517 |
1 files changed, 517 insertions, 0 deletions
diff --git a/usr.bin/sed/main.c b/usr.bin/sed/main.c new file mode 100644 index 0000000..cfe9d35 --- /dev/null +++ b/usr.bin/sed/main.c @@ -0,0 +1,517 @@ +/* $NetBSD: main.c,v 1.34 2015/03/12 12:40:41 christos Exp $ */ + +/*- + * Copyright (c) 2013 Johann 'Myrkraverk' Oskarsson. + * 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. + */ + +#if HAVE_NBTOOL_CONFIG_H +#include "nbtool_config.h" +#endif + +#include <sys/cdefs.h> +__RCSID("$NetBSD: main.c,v 1.34 2015/03/12 12:40:41 christos Exp $"); +#ifdef __FBSDID +__FBSDID("$FreeBSD: head/usr.bin/sed/main.c 252231 2013-06-26 04:14:19Z pfg $"); +#endif + +#ifndef lint +__COPYRIGHT("@(#) Copyright (c) 1992, 1993\ + The Regents of the University of California. All rights reserved."); +#endif + +#if 0 +static const char sccsid[] = "@(#)main.c 8.2 (Berkeley) 1/3/94"; +#endif + +#include <sys/types.h> +#include <sys/mman.h> +#include <sys/param.h> +#include <sys/stat.h> + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <libgen.h> +#include <limits.h> +#include <locale.h> +#include <regex.h> +#include <stddef.h> +#define _WITH_GETLINE +#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; + +FILE *infile; /* Current input file */ +FILE *outfile; /* Current output file */ + +int aflag, eflag, nflag; +int rflags = 0; +static int rval; /* Exit status */ + +static int ispan; /* Whether inplace editing spans across files */ + +/* + * Current file and line number; line numbers restart across compilation + * units, but span across input files. The latter is optional if editing + * in place. + */ +const char *fname; /* File name. */ +const char *outfname; /* Output file name */ +static char oldfname[PATH_MAX]; /* Old file name (for in-place editing) */ +static char tmpfname[PATH_MAX]; /* Temporary file name (for in-place editing) */ +static const char *inplace; /* Inplace edit file extension. */ +u_long linenum; + +static void add_compunit(enum e_cut, char *); +static void add_file(char *); +static void usage(void) __dead; + +int +main(int argc, char *argv[]) +{ + int c, fflag; + char *temp_arg; + + setprogname(argv[0]); + (void) setlocale(LC_ALL, ""); + + fflag = 0; + inplace = NULL; + + while ((c = getopt(argc, argv, "EI::ae:f:i::lnru")) != -1) + switch (c) { + case 'r': /* Gnu sed compat */ + case 'E': + rflags = REG_EXTENDED; + break; + case 'I': + inplace = optarg ? optarg : __UNCONST(""); + ispan = 1; /* span across input files */ + break; + case 'a': + aflag = 1; + break; + case 'e': + eflag = 1; + temp_arg = xmalloc(strlen(optarg) + 2); + strcpy(temp_arg, optarg); + strcat(temp_arg, "\n"); + add_compunit(CU_STRING, temp_arg); + break; + case 'f': + fflag = 1; + add_compunit(CU_FILE, optarg); + break; + case 'i': + inplace = optarg ? optarg : __UNCONST(""); + ispan = 0; /* don't span across input files */ + break; + case 'l': +#ifdef _IOLBF + c = setvbuf(stdout, NULL, _IOLBF, 0); +#else + c = setlinebuf(stdout); +#endif + if (c) + warn("setting line buffered output failed"); + break; + case 'n': + nflag = 1; + break; + case 'u': +#ifdef _IONBF + c = setvbuf(stdout, NULL, _IONBF, 0); +#else + c = -1; + errno = EOPNOTSUPP; +#endif + if (c) + warn("setting unbuffered output failed"); + break; + default: + case '?': + usage(); + } + 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(1, "stdout"); + exit(rval); +} + +static void +usage(void) +{ + (void)fprintf(stderr, + "Usage: %s [-aElnru] command [file ...]\n" + "\t%s [-aElnru] [-e command] [-f command_file] [-I[extension]]\n" + "\t [-i[extension]] [file ...]\n", getprogname(), getprogname()); + exit(1); +} + +/* + * 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, int *more) +{ + 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) { + if (more != NULL) + *more = 0; + return (NULL); + } + linenum = 0; + switch (script->type) { + case CU_FILE: + if ((f = fopen(script->s, "r")) == NULL) + err(1, "%s", script->s); + fname = script->s; + state = ST_FILE; + goto again; + case CU_STRING: + if (((size_t)snprintf(string_ident, + sizeof(string_ident), "\"%s\"", script->s)) >= + sizeof(string_ident) - 1) + (void)strcpy(string_ident + + sizeof(string_ident) - 6, " ...\""); + 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; + if (more != NULL) + *more = !feof(f); + 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++; + if (more != NULL) + *more = 1; + 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++; + if (more != NULL) + *more = 0; + return (buf); + } + case '\n': + *p++ = '\n'; + *p = '\0'; + s++; + linenum++; + if (more != NULL) + *more = 0; + return (buf); + default: + *p++ = *s++; + } + } + } + /* NOTREACHED */ + return (NULL); +} + +/* + * 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) +{ + struct stat sb; + size_t len; + static char *p = NULL; + static size_t plen = 0; + int c; + static int firstfile; + + if (infile == NULL) { + /* stdin? */ + if (files->fname == NULL) { + if (inplace != NULL) + errx(1, "-I or -i may not be used with stdin"); + infile = stdin; + fname = "stdin"; + outfile = stdout; + outfname = "stdout"; + } + firstfile = 1; + } + + for (;;) { + if (infile != NULL && (c = getc(infile)) != EOF) { + (void)ungetc(c, infile); + break; + } + /* If we are here then either eof or no files are open yet */ + if (infile == stdin) { + sp->len = 0; + return (0); + } + if (infile != NULL) { + fclose(infile); + if (*oldfname != '\0') { + /* if there was a backup file, remove it */ + unlink(oldfname); + /* + * Backup the original. Note that hard links + * are not supported on all filesystems. + */ + if ((link(fname, oldfname) != 0) && + (rename(fname, oldfname) != 0)) { + warn("rename()"); + if (*tmpfname) + unlink(tmpfname); + exit(1); + } + *oldfname = '\0'; + } + if (*tmpfname != '\0') { + if (outfile != NULL && outfile != stdout) + if (fclose(outfile) != 0) { + warn("fclose()"); + unlink(tmpfname); + exit(1); + } + outfile = NULL; + if (rename(tmpfname, fname) != 0) { + /* this should not happen really! */ + warn("rename()"); + unlink(tmpfname); + exit(1); + } + *tmpfname = '\0'; + } + outfname = NULL; + } + if (firstfile == 0) + files = files->next; + else + firstfile = 0; + if (files == NULL) { + sp->len = 0; + return (0); + } + fname = files->fname; + if (inplace != NULL) { + if (lstat(fname, &sb) != 0) + err(1, "%s", fname); + if (!(sb.st_mode & S_IFREG)) + errx(1, "%s: %s %s", fname, + "in-place editing only", + "works for regular files"); + if (*inplace != '\0') { + strlcpy(oldfname, fname, + sizeof(oldfname)); + len = strlcat(oldfname, inplace, + sizeof(oldfname)); + if (len > sizeof(oldfname)) + errx(1, "%s: name too long", fname); + } + char d_name[PATH_MAX], f_name[PATH_MAX]; + (void)strlcpy(d_name, fname, sizeof(d_name)); + (void)strlcpy(f_name, fname, sizeof(f_name)); + len = (size_t)snprintf(tmpfname, sizeof(tmpfname), + "%s/.!%ld!%s", dirname(d_name), (long)getpid(), + basename(f_name)); + if (len >= sizeof(tmpfname)) + errx(1, "%s: name too long", fname); + unlink(tmpfname); + if (outfile != NULL && outfile != stdout) + fclose(outfile); + if ((outfile = fopen(tmpfname, "w")) == NULL) + err(1, "%s", fname); + fchown(fileno(outfile), sb.st_uid, sb.st_gid); + fchmod(fileno(outfile), sb.st_mode & ALLPERMS); + outfname = tmpfname; + if (!ispan) { + linenum = 0; + resetstate(); + } + } else { + outfile = stdout; + outfname = "stdout"; + } + if ((infile = fopen(fname, "r")) == NULL) { + warn("%s", fname); + rval = 1; + continue; + } + } + /* + * We are here only when infile is open and we still have something + * to read from it. + * + * Use getline() so that we can handle essentially infinite input + * data. The p and plen are static so each invocation gives + * getline() the same buffer which is expanded as needed. + */ + ssize_t slen = getline(&p, &plen, infile); + if (slen == -1) + err(1, "%s", fname); + if (slen != 0 && p[slen - 1] == '\n') + slen--; + cspace(sp, p, (size_t)slen, spflag); + + linenum++; + + 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; +} + +int +lastline(void) +{ + int ch; + + if (files->next != NULL && (inplace == NULL || ispan)) + return (0); + if ((ch = getc(infile)) == EOF) + return (1); + ungetc(ch, infile); + return (0); +} |