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Diffstat (limited to 'textproc/sed_inplace/src/main.c')
| -rw-r--r-- | textproc/sed_inplace/src/main.c | 466 |
1 files changed, 466 insertions, 0 deletions
diff --git a/textproc/sed_inplace/src/main.c b/textproc/sed_inplace/src/main.c new file mode 100644 index 000000000000..a68e1264b1ea --- /dev/null +++ b/textproc/sed_inplace/src/main.c @@ -0,0 +1,466 @@ +/*- + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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/cdefs.h> +__FBSDID("$FreeBSD: /tmp/pcvs/ports/textproc/sed_inplace/src/Attic/main.c,v 1.1 2002-06-17 08:46:11 sobomax Exp $"); + +#ifndef lint +static const char copyright[] = +"@(#) Copyright (c) 1992, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif + +#ifndef lint +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 <locale.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; +int rflags = 0; +static int rval; /* Exit status */ + +/* + * Current file and line number; line numbers restart across compilation + * units, but span across input files. + */ +const char *fname; /* File name. */ +const char *inplace; /* Inplace edit file extension. */ +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 *); +static int inplace_edit(char **); +static void usage(void); + +int +main(argc, argv) + int argc; + char *argv[]; +{ + int c, fflag; + char *temp_arg; + + (void) setlocale(LC_ALL, ""); + + fflag = 0; + inplace = NULL; + + while ((c = getopt(argc, argv, "Eae:f:i:n")) != -1) + switch (c) { + case 'E': + rflags = REG_EXTENDED; + break; + case 'a': + aflag = 1; + break; + case 'e': + eflag = 1; + if ((temp_arg = malloc(strlen(optarg) + 2)) == NULL) + err(1, "malloc"); + 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; + break; + case 'n': + nflag = 1; + 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)fprintf(stderr, "%s\n%s\n", + "usage: sed script [-Ean] [-i extension] [file ...]", + " sed [-an] [-i extension] [-e script] ... [-f script_file] ... [file ...]"); + exit(1); +} + +/* + * Like fgets, but go through the chain of compilation units chaining them + * together. Empty strings and files are ignored. + */ +char * +cu_fgets(buf, n, more) + 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 ((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(sp, spflag) + SPACE *sp; + enum e_spflag spflag; +{ + static FILE *f; /* Current open file */ + size_t len; + char *p; + int c; + static int firstfile; + + if (f == NULL) { + /* stdin? */ + if (files->fname == NULL) { + if (inplace != NULL) + errx(1, "-i may not be used with stdin"); + f = stdin; + fname = "stdin"; + } + firstfile = 1; + } + + for (;;) { + if (f != NULL && (c = getc(f)) != EOF) { + (void)ungetc(c, f); + break; + } + /* If we are here then either eof or no files are open yet */ + if (f == stdin) { + sp->len = 0; + lastline = 1; + return (0); + } + if (f != NULL) { + fclose(f); + } + if (firstfile == 0) { + files = files->next; + } else + firstfile = 0; + if (files == NULL) { + sp->len = 0; + lastline = 1; + return (0); + } + if (inplace != NULL) { + if (inplace_edit(&files->fname) == -1) + continue; + } + fname = files->fname; + if ((f = fopen(fname, "r")) == NULL) { + warn("%s", fname); + rval = 1; + continue; + } + if (inplace != NULL && *inplace == '\0') + unlink(fname); + } + /* + * We are here only when f 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(f, &len); + if (ferror(f)) + errx(1, "%s: %s", fname, strerror(errno ? errno : EIO)); + cspace(sp, p, len, spflag); + + linenum++; + if (files->next == NULL) { + if ((c = getc(f)) != EOF) { + (void)ungetc(c, f); + } else { + lastline = 1; + } + } + + return (1); +} + +/* + * Add a compilation unit to the linked list + */ +static void +add_compunit(type, s) + enum e_cut type; + char *s; +{ + struct s_compunit *cu; + + if ((cu = malloc(sizeof(struct s_compunit))) == NULL) + err(1, "malloc"); + 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(s) + char *s; +{ + struct s_flist *fp; + + if ((fp = malloc(sizeof(struct s_flist))) == NULL) + err(1, "malloc"); + fp->next = NULL; + *fl_nextp = fp; + fp->fname = s; + fl_nextp = &fp->next; +} + +/* + * Modify a pointer to a filename for inplace editing and reopen stdout + */ +static int +inplace_edit(filename) + char **filename; +{ + struct stat orig; + int input, output; + char backup[MAXPATHLEN]; + char *buffer; + + if (lstat(*filename, &orig) == -1) + err(1, "lstat"); + if ((orig.st_mode & S_IFREG) == 0) { + warnx("cannot inplace edit %s, not a regular file", *filename); + return -1; + } + + if (*inplace == '\0') { + char template[] = "/tmp/sed.XXXXXXXXXX"; + + output = mkstemp(template); + if (output == -1) + err(1, "mkstemp"); + strlcpy(backup, template, MAXPATHLEN); + } else { + strlcpy(backup, *filename, MAXPATHLEN); + strlcat(backup, inplace, MAXPATHLEN); + output = open(backup, O_WRONLY | O_CREAT | O_TRUNC); + if (output == -1) + err(1, "open(%s)", backup); + } + + input = open(*filename, O_RDONLY); + if (input == -1) + err(1, "open(%s)", *filename); + if (fchmod(output, orig.st_mode & ~S_IFMT) == -1) + err(1, "chmod"); + buffer = (char *)mmap(0, orig.st_size, PROT_READ, MAP_SHARED, input, 0); + if (buffer == MAP_FAILED) + err(1, "mmap(%s)", *filename); + if (write(output, buffer, orig.st_size) == -1) + err(1, "write(%s)", backup); + if (munmap(buffer, orig.st_size) == -1) + err(1, "munmap(%s)", *filename); + close(input); + close(output); + freopen(*filename, "w", stdout); + *filename = strdup(backup); + return 0; +} |