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Diffstat (limited to 'package/toolbox/src/sed/main.c')
-rw-r--r-- | package/toolbox/src/sed/main.c | 523 |
1 files changed, 523 insertions, 0 deletions
diff --git a/package/toolbox/src/sed/main.c b/package/toolbox/src/sed/main.c new file mode 100644 index 000000000..afa10d4df --- /dev/null +++ b/package/toolbox/src/sed/main.c @@ -0,0 +1,523 @@ +/* $OpenBSD: main.c,v 1.35 2017/08/01 18:05:53 martijn Exp $ */ + +/*- + * Copyright (c) 2016, 2017 + * mirabilos <m@mirbsd.org> + * 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. + */ + +#include <sys/types.h> +#include <sys/ioctl.h> +#include <sys/stat.h> + +#include <ctype.h> +#include <errno.h> +#include <fcntl.h> +#include <limits.h> +#include <regex.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <libgen.h> + +#include "defs.h" +#include "extern.h" + +__RCSID("$MirOS: src/usr.bin/sed/main.c,v 1.3 2017/11/20 01:23:57 tg Exp $"); + +/* + * 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 Eflag, aflag, eflag, nflag; +static int rval; /* Exit status */ + +/* + * 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) */ +const char *inplace; /* Inplace edit file extension */ +u_long linenum; + +static void add_compunit(enum e_cut, char *); +static void add_file(char *); +static int next_files_have_lines(void); + +int termwidth; + +int pledge_wpath, pledge_rpath; + +int +main(int argc, char *argv[]) +{ + int c, fflag; + + fflag = 0; + inplace = NULL; + while ((c = getopt(argc, argv, "Eae:f:i::nru")) != -1) + switch (c) { + case 'E': + case 'r': + Eflag = 1; + break; + 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 'i': + inplace = optarg ? optarg : ""; + break; + case 'n': + nflag = 1; + break; + case 'u': + setvbuf(stdout, NULL, _IOLBF, 0); + break; + default: + case '?': + (void)fprintf(stderr, + "usage: sed [-aEnru] [-i[extension]] command [file ...]\n" + " sed [-aEnru] [-e command] [-f command_file] [-i[extension]] [file ...]\n"); + exit(1); + } + argc -= optind; + argv += optind; + + termwidth = 60; + +#if defined(__OpenBSD__) && !defined(__MirBSD__) + if (inplace != NULL) { + if (pledge("stdio rpath wpath cpath fattr chown", NULL) == -1) + error(FATAL, "pledge: %s", strerror(errno)); + } else { + if (pledge("stdio rpath wpath cpath", NULL) == -1) + error(FATAL, "pledge: %s", strerror(errno)); + } +#endif + + /* 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) { +#if defined(__OpenBSD__) && !defined(__MirBSD__) + if (!pledge_wpath && inplace == NULL) { + if (pledge("stdio rpath", NULL) == -1) + error(FATAL, "pledge: %s", strerror(errno)); + } +#endif + for (; *argv; argv++) + add_file(*argv); + } else { +#if defined(__OpenBSD__) && !defined(__MirBSD__) + if (!pledge_wpath && !pledge_rpath) { + if (pledge("stdio", NULL) == -1) + error(FATAL, "pledge: %s", strerror(errno)); + } else if (pledge_rpath) { + if (pledge("stdio rpath", NULL) == -1) + error(FATAL, "pledge: %s", strerror(errno)); + } else if (pledge_wpath) { + if (pledge("stdio wpath cpath", NULL) == -1) + error(FATAL, "pledge: %s", strerror(errno)); + } +#endif + add_file(NULL); + } + process(); + cfclose(prog, NULL); + if (fclose(stdout)) + error(FATAL, "stdout: %s", strerror(errno)); + exit (rval); +} + +/* + * Like fgets, but go through the chain of compilation units chaining them + * together. Empty strings and files are ignored. + */ +char * +cu_fgets(char **outbuf, size_t *outsize) +{ + 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]; + size_t len; + char *p; + + if (*outbuf == NULL) + *outsize = 0; + +again: + switch (state) { + case ST_EOF: + if (script == NULL) + goto cu_fgets_nilreturn; + linenum = 0; + switch (script->type) { + case CU_FILE: + if ((f = fopen(script->s, "r")) == NULL) + error(FATAL, + "%s: %s", script->s, strerror(errno)); + 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)) + strlcpy(string_ident + + sizeof(string_ident) - 6, " ...\"", 5); + fname = string_ident; + s = script->s; + state = ST_STRING; + goto again; + } + case ST_FILE: + if ((p = fgetln(f, &len)) != NULL) { + linenum++; + if (len >= *outsize) { + free(*outbuf); + *outsize = ROUNDLEN(len + 1); + *outbuf = xmalloc(*outsize); + } + memcpy(*outbuf, p, len); + (*outbuf)[len] = '\0'; + if (linenum == 1 && p[0] == '#' && p[1] == 'n') + nflag = 1; + return (*outbuf); + } + 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 = *outbuf; + len = *outsize; + for (;;) { + if (len <= 1) { + *outbuf = xrealloc(*outbuf, + *outsize + _POSIX2_LINE_MAX); + p = *outbuf + *outsize - len; + len += _POSIX2_LINE_MAX; + *outsize += _POSIX2_LINE_MAX; + } + switch (*s) { + case '\0': + state = ST_EOF; + if (s == script->s) { + script = script->next; + goto again; + } else { + script = script->next; + *p = '\0'; + linenum++; + return (*outbuf); + } + case '\n': + *p++ = '\n'; + *p = '\0'; + s++; + linenum++; + return (*outbuf); + default: + *p++ = *s++; + len--; + } + } + } + /* NOTREACHED */ + /* but GCC doesn't care, so: */ + cu_fgets_nilreturn: + 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; + char *p; + int c, fd; + static int firstfile; + + if (infile == NULL) { + /* stdin? */ + if (files->fname == NULL) { + if (inplace != NULL) + error(FATAL, "-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 (rename(fname, oldfname) != 0) { + warning("rename()"); + unlink(tmpfname); + exit(1); + } + *oldfname = '\0'; + } + if (*tmpfname != '\0') { + if (outfile != NULL && outfile != stdout) + fclose(outfile); + outfile = NULL; + rename(tmpfname, fname); + *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) { + char *tmpdirname; + + if (lstat(fname, &sb) != 0) + error(FATAL, "%s: %s", fname, + strerror(errno ? errno : EIO)); + if (!S_ISREG(sb.st_mode)) + error(FATAL, "%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)) + error(FATAL, "%s: name too long", fname); + } + len = snprintf(tmpfname, sizeof(tmpfname), "%s/sedXXXXXXXXXX", + dirname(tmpdirname = strdup(fname))); + free(tmpdirname); + if (len >= sizeof(tmpfname)) + error(FATAL, "%s: name too long", fname); + if ((fd = mkstemp(tmpfname)) == -1) + error(FATAL, "%s: %s", fname, strerror(errno)); + if ((outfile = fdopen(fd, "w")) == NULL) { + unlink(tmpfname); + error(FATAL, "%s", fname); + } + fchown(fileno(outfile), sb.st_uid, sb.st_gid); + fchmod(fileno(outfile), sb.st_mode & ALLPERMS); + outfname = tmpfname; + linenum = 0; + resetranges(); + } else { + outfile = stdout; + outfname = "stdout"; + } + if ((infile = fopen(fname, "r")) == NULL) { + warning("%s", strerror(errno)); + rval = 1; + continue; + } + } + + /* + * We are here only when infile is open and we still have something + * to read from it. + * + * 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(infile, &len); + if (ferror(infile)) + error(FATAL, "%s: %s", fname, strerror(errno ? errno : EIO)); + if (len != 0 && p[len - 1] == '\n') { + sp->append_newline = 1; + len--; + } else if (!lastline()) { + sp->append_newline = 1; + } else { + sp->append_newline = 0; + } + cspace(sp, p, len, 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; +} + + +static int +next_files_have_lines(void) +{ + struct s_flist *file; + FILE *file_fd; + int ch; + + file = files; + while ((file = file->next) != NULL) { + if ((file_fd = fopen(file->fname, "r")) == NULL) + continue; + + if ((ch = getc(file_fd)) != EOF) { + /* + * This next file has content, therefore current + * file doesn't contains the last line. + */ + ungetc(ch, file_fd); + fclose(file_fd); + return (1); + } + fclose(file_fd); + } + return (0); +} + +int +lastline(void) +{ + int ch; + + if (feof(infile)) { + return !( + (inplace == NULL) && + next_files_have_lines()); + } + if ((ch = getc(infile)) == EOF) { + return !( + (inplace == NULL) && + next_files_have_lines()); + } + ungetc(ch, infile); + return (0); +} |