diff options
Diffstat (limited to 'usr.bin/tail')
| -rw-r--r-- | usr.bin/tail/Makefile | 6 | ||||
| -rw-r--r-- | usr.bin/tail/extern.h | 53 | ||||
| -rw-r--r-- | usr.bin/tail/forward.c | 234 | ||||
| -rw-r--r-- | usr.bin/tail/misc.c | 91 | ||||
| -rw-r--r-- | usr.bin/tail/read.c | 198 | ||||
| -rw-r--r-- | usr.bin/tail/reverse.c | 259 | ||||
| -rw-r--r-- | usr.bin/tail/tail.1 | 165 | ||||
| -rw-r--r-- | usr.bin/tail/tail.c | 302 |
8 files changed, 0 insertions, 1308 deletions
diff --git a/usr.bin/tail/Makefile b/usr.bin/tail/Makefile deleted file mode 100644 index de1c3c9..0000000 --- a/usr.bin/tail/Makefile +++ /dev/null @@ -1,6 +0,0 @@ -# @(#)Makefile 8.1 (Berkeley) 6/6/93 - -PROG= tail -SRCS= forward.c misc.c read.c reverse.c tail.c - -.include <bsd.prog.mk> diff --git a/usr.bin/tail/extern.h b/usr.bin/tail/extern.h deleted file mode 100644 index 65efc14..0000000 --- a/usr.bin/tail/extern.h +++ /dev/null @@ -1,53 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * - * 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. - * - * @(#)extern.h 8.1 (Berkeley) 6/6/93 - */ - -#define WR(p, size) \ - if (write(STDOUT_FILENO, p, size) != size) \ - oerr(); - -enum STYLE { NOTSET = 0, FBYTES, FLINES, RBYTES, RLINES, REVERSE }; - -void forward __P((FILE *, enum STYLE, long, struct stat *)); -void reverse __P((FILE *, enum STYLE, long, struct stat *)); - -void bytes __P((FILE *, off_t)); -void lines __P((FILE *, off_t)); - -void err __P((int fatal, const char *fmt, ...)); -void ierr __P((void)); -void oerr __P((void)); - -extern int fflag, rflag, rval; -extern char *fname; diff --git a/usr.bin/tail/forward.c b/usr.bin/tail/forward.c deleted file mode 100644 index 8e32cc4..0000000 --- a/usr.bin/tail/forward.c +++ /dev/null @@ -1,234 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Edward Sze-Tyan Wang. - * - * 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. - */ - -#ifndef lint -static char sccsid[] = "@(#)forward.c 8.1 (Berkeley) 6/6/93"; -#endif /* not lint */ - -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/time.h> -#include <sys/mman.h> - -#include <limits.h> -#include <fcntl.h> -#include <errno.h> -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "extern.h" - -static void rlines __P((FILE *, long, struct stat *)); - -/* - * forward -- display the file, from an offset, forward. - * - * There are eight separate cases for this -- regular and non-regular - * files, by bytes or lines and from the beginning or end of the file. - * - * FBYTES byte offset from the beginning of the file - * REG seek - * NOREG read, counting bytes - * - * FLINES line offset from the beginning of the file - * REG read, counting lines - * NOREG read, counting lines - * - * RBYTES byte offset from the end of the file - * REG seek - * NOREG cyclically read characters into a wrap-around buffer - * - * RLINES - * REG mmap the file and step back until reach the correct offset. - * NOREG cyclically read lines into a wrap-around array of buffers - */ -void -forward(fp, style, off, sbp) - FILE *fp; - enum STYLE style; - long off; - struct stat *sbp; -{ - register int ch; - struct timeval second; - fd_set zero; - - switch(style) { - case FBYTES: - if (off == 0) - break; - if (S_ISREG(sbp->st_mode)) { - if (sbp->st_size < off) - off = sbp->st_size; - if (fseek(fp, off, SEEK_SET) == -1) { - ierr(); - return; - } - } else while (off--) - if ((ch = getc(fp)) == EOF) { - if (ferror(fp)) { - ierr(); - return; - } - break; - } - break; - case FLINES: - if (off == 0) - break; - for (;;) { - if ((ch = getc(fp)) == EOF) { - if (ferror(fp)) { - ierr(); - return; - } - break; - } - if (ch == '\n' && !--off) - break; - } - break; - case RBYTES: - if (S_ISREG(sbp->st_mode)) { - if (sbp->st_size >= off && - fseek(fp, -off, SEEK_END) == -1) { - ierr(); - return; - } - } else if (off == 0) { - while (getc(fp) != EOF); - if (ferror(fp)) { - ierr(); - return; - } - } else - bytes(fp, off); - break; - case RLINES: - if (S_ISREG(sbp->st_mode)) - if (!off) { - if (fseek(fp, 0L, SEEK_END) == -1) { - ierr(); - return; - } - } else - rlines(fp, off, sbp); - else if (off == 0) { - while (getc(fp) != EOF); - if (ferror(fp)) { - ierr(); - return; - } - } else - lines(fp, off); - break; - } - - /* - * We pause for one second after displaying any data that has - * accumulated since we read the file. - */ - if (fflag) { - FD_ZERO(&zero); - second.tv_sec = 1; - second.tv_usec = 0; - } - - for (;;) { - while ((ch = getc(fp)) != EOF) - if (putchar(ch) == EOF) - oerr(); - if (ferror(fp)) { - ierr(); - return; - } - (void)fflush(stdout); - if (!fflag) - break; - /* Sleep(3) is eight system calls. Do it fast. */ - if (select(0, &zero, &zero, &zero, &second) == -1) - err(1, "select: %s", strerror(errno)); - clearerr(fp); - } -} - -/* - * rlines -- display the last offset lines of the file. - */ -static void -rlines(fp, off, sbp) - FILE *fp; - long off; - struct stat *sbp; -{ - register off_t size; - register char *p; - char *start; - - if (!(size = sbp->st_size)) - return; - - if (size > SIZE_T_MAX) { - err(0, "%s: %s", fname, strerror(EFBIG)); - return; - } - - if ((start = mmap(NULL, (size_t)size, - PROT_READ, 0, fileno(fp), (off_t)0)) == (caddr_t)-1) { - err(0, "%s: %s", fname, strerror(EFBIG)); - return; - } - - /* Last char is special, ignore whether newline or not. */ - for (p = start + size - 1; --size;) - if (*--p == '\n' && !--off) { - ++p; - break; - } - - /* Set the file pointer to reflect the length displayed. */ - size = sbp->st_size - size; - WR(p, size); - if (fseek(fp, (long)sbp->st_size, SEEK_SET) == -1) { - ierr(); - return; - } - if (munmap(start, (size_t)sbp->st_size)) { - err(0, "%s: %s", fname, strerror(errno)); - return; - } -} diff --git a/usr.bin/tail/misc.c b/usr.bin/tail/misc.c deleted file mode 100644 index 18fd63d..0000000 --- a/usr.bin/tail/misc.c +++ /dev/null @@ -1,91 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Edward Sze-Tyan Wang. - * - * 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. - */ - -#ifndef lint -static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 6/6/93"; -#endif /* not lint */ - -#include <sys/types.h> -#include <sys/stat.h> -#include <errno.h> -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "extern.h" - -void -ierr() -{ - err(0, "%s: %s", fname, strerror(errno)); -} - -void -oerr() -{ - err(1, "stdout: %s", strerror(errno)); -} - -#if __STDC__ -#include <stdarg.h> -#else -#include <varargs.h> -#endif - -void -#if __STDC__ -err(int fatal, const char *fmt, ...) -#else -err(fatal, fmt, va_alist) - int fatal; - char *fmt; - va_dcl -#endif -{ - va_list ap; -#if __STDC__ - va_start(ap, fmt); -#else - va_start(ap); -#endif - (void)fprintf(stderr, "tail: "); - (void)vfprintf(stderr, fmt, ap); - va_end(ap); - (void)fprintf(stderr, "\n"); - if (fatal) - exit(1); - rval = 1; -} diff --git a/usr.bin/tail/read.c b/usr.bin/tail/read.c deleted file mode 100644 index dc570a3..0000000 --- a/usr.bin/tail/read.c +++ /dev/null @@ -1,198 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Edward Sze-Tyan Wang. - * - * 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. - */ - -#ifndef lint -static char sccsid[] = "@(#)read.c 8.1 (Berkeley) 6/6/93"; -#endif /* not lint */ - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <errno.h> -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "extern.h" - -/* - * bytes -- read bytes to an offset from the end and display. - * - * This is the function that reads to a byte offset from the end of the input, - * storing the data in a wrap-around buffer which is then displayed. If the - * rflag is set, the data is displayed in lines in reverse order, and this - * routine has the usual nastiness of trying to find the newlines. Otherwise, - * it is displayed from the character closest to the beginning of the input to - * the end. - */ -void -bytes(fp, off) - register FILE *fp; - off_t off; -{ - register int ch, len, tlen; - register char *ep, *p, *t; - int wrap; - char *sp; - - if ((sp = p = malloc(off)) == NULL) - err(1, "%s", strerror(errno)); - - for (wrap = 0, ep = p + off; (ch = getc(fp)) != EOF;) { - *p = ch; - if (++p == ep) { - wrap = 1; - p = sp; - } - } - if (ferror(fp)) { - ierr(); - return; - } - - if (rflag) { - for (t = p - 1, len = 0; t >= sp; --t, ++len) - if (*t == '\n' && len) { - WR(t + 1, len); - len = 0; - } - if (wrap) { - tlen = len; - for (t = ep - 1, len = 0; t >= p; --t, ++len) - if (*t == '\n') { - if (len) { - WR(t + 1, len); - len = 0; - } - if (tlen) { - WR(sp, tlen); - tlen = 0; - } - } - if (len) - WR(t + 1, len); - if (tlen) - WR(sp, tlen); - } - } else { - if (wrap && (len = ep - p)) - WR(p, len); - if (len = p - sp) - WR(sp, len); - } -} - -/* - * lines -- read lines to an offset from the end and display. - * - * This is the function that reads to a line offset from the end of the input, - * storing the data in an array of buffers which is then displayed. If the - * rflag is set, the data is displayed in lines in reverse order, and this - * routine has the usual nastiness of trying to find the newlines. Otherwise, - * it is displayed from the line closest to the beginning of the input to - * the end. - */ -void -lines(fp, off) - register FILE *fp; - off_t off; -{ - struct { - u_int blen; - u_int len; - char *l; - } *lines; - register int ch; - register char *p; - int blen, cnt, recno, wrap; - char *sp; - - if ((lines = malloc(off * sizeof(*lines))) == NULL) - err(1, "%s", strerror(errno)); - - sp = NULL; - blen = cnt = recno = wrap = 0; - - while ((ch = getc(fp)) != EOF) { - if (++cnt > blen) { - if ((sp = realloc(sp, blen += 1024)) == NULL) - err(1, "%s", strerror(errno)); - p = sp + cnt - 1; - } - *p++ = ch; - if (ch == '\n') { - if (lines[recno].blen < cnt) { - lines[recno].blen = cnt + 256; - if ((lines[recno].l = realloc(lines[recno].l, - lines[recno].blen)) == NULL) - err(1, "%s", strerror(errno)); - } - bcopy(sp, lines[recno].l, lines[recno].len = cnt); - cnt = 0; - p = sp; - if (++recno == off) { - wrap = 1; - recno = 0; - } - } - } - if (ferror(fp)) { - ierr(); - return; - } - if (cnt) { - lines[recno].l = sp; - lines[recno].len = cnt; - if (++recno == off) { - wrap = 1; - recno = 0; - } - } - - if (rflag) { - for (cnt = recno - 1; cnt >= 0; --cnt) - WR(lines[cnt].l, lines[cnt].len); - if (wrap) - for (cnt = off - 1; cnt >= recno; --cnt) - WR(lines[cnt].l, lines[cnt].len); - } else { - if (wrap) - for (cnt = recno; cnt < off; ++cnt) - WR(lines[cnt].l, lines[cnt].len); - for (cnt = 0; cnt < recno; ++cnt) - WR(lines[cnt].l, lines[cnt].len); - } -} diff --git a/usr.bin/tail/reverse.c b/usr.bin/tail/reverse.c deleted file mode 100644 index 34cd980..0000000 --- a/usr.bin/tail/reverse.c +++ /dev/null @@ -1,259 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Edward Sze-Tyan Wang. - * - * 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. - */ - -#ifndef lint -static char sccsid[] = "@(#)reverse.c 8.1 (Berkeley) 6/6/93"; -#endif /* not lint */ - -#include <sys/param.h> -#include <sys/stat.h> -#include <sys/mman.h> - -#include <limits.h> -#include <errno.h> -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "extern.h" - -static void r_buf __P((FILE *)); -static void r_reg __P((FILE *, enum STYLE, long, struct stat *)); - -/* - * reverse -- display input in reverse order by line. - * - * There are six separate cases for this -- regular and non-regular - * files by bytes, lines or the whole file. - * - * BYTES display N bytes - * REG mmap the file and display the lines - * NOREG cyclically read characters into a wrap-around buffer - * - * LINES display N lines - * REG mmap the file and display the lines - * NOREG cyclically read lines into a wrap-around array of buffers - * - * FILE display the entire file - * REG mmap the file and display the lines - * NOREG cyclically read input into a linked list of buffers - */ -void -reverse(fp, style, off, sbp) - FILE *fp; - enum STYLE style; - long off; - struct stat *sbp; -{ - if (style != REVERSE && off == 0) - return; - - if (S_ISREG(sbp->st_mode)) - r_reg(fp, style, off, sbp); - else - switch(style) { - case FBYTES: - case RBYTES: - bytes(fp, off); - break; - case FLINES: - case RLINES: - lines(fp, off); - break; - case REVERSE: - r_buf(fp); - break; - } -} - -/* - * r_reg -- display a regular file in reverse order by line. - */ -static void -r_reg(fp, style, off, sbp) - FILE *fp; - register enum STYLE style; - long off; - struct stat *sbp; -{ - register off_t size; - register int llen; - register char *p; - char *start; - - if (!(size = sbp->st_size)) - return; - - if (size > SIZE_T_MAX) { - err(0, "%s: %s", fname, strerror(EFBIG)); - return; - } - - if ((start = mmap(NULL, (size_t)size, - PROT_READ, 0, fileno(fp), (off_t)0)) == (caddr_t)-1) { - err(0, "%s: %s", fname, strerror(EFBIG)); - return; - } - p = start + size - 1; - - if (style == RBYTES && off < size) - size = off; - - /* Last char is special, ignore whether newline or not. */ - for (llen = 1; --size; ++llen) - if (*--p == '\n') { - WR(p + 1, llen); - llen = 0; - if (style == RLINES && !--off) { - ++p; - break; - } - } - if (llen) - WR(p, llen); - if (munmap(start, (size_t)sbp->st_size)) - err(0, "%s: %s", fname, strerror(errno)); -} - -typedef struct bf { - struct bf *next; - struct bf *prev; - int len; - char *l; -} BF; - -/* - * r_buf -- display a non-regular file in reverse order by line. - * - * This is the function that saves the entire input, storing the data in a - * doubly linked list of buffers and then displays them in reverse order. - * It has the usual nastiness of trying to find the newlines, as there's no - * guarantee that a newline occurs anywhere in the file, let alone in any - * particular buffer. If we run out of memory, input is discarded (and the - * user warned). - */ -static void -r_buf(fp) - FILE *fp; -{ - register BF *mark, *tl, *tr; - register int ch, len, llen; - register char *p; - off_t enomem; - -#define BSZ (128 * 1024) - for (mark = NULL, enomem = 0;;) { - /* - * Allocate a new block and link it into place in a doubly - * linked list. If out of memory, toss the LRU block and - * keep going. - */ - if (enomem || (tl = malloc(sizeof(BF))) == NULL || - (tl->l = malloc(BSZ)) == NULL) { - if (!mark) - err(1, "%s", strerror(errno)); - tl = enomem ? tl->next : mark; - enomem += tl->len; - } else if (mark) { - tl->next = mark; - tl->prev = mark->prev; - mark->prev->next = tl; - mark->prev = tl; - } else - mark->next = mark->prev = (mark = tl); - - /* Fill the block with input data. */ - for (p = tl->l, len = 0; - len < BSZ && (ch = getc(fp)) != EOF; ++len) - *p++ = ch; - - /* - * If no input data for this block and we tossed some data, - * recover it. - */ - if (!len) { - if (enomem) - enomem -= tl->len; - tl = tl->prev; - break; - } - - tl->len = len; - if (ch == EOF) - break; - } - - if (enomem) { - (void)fprintf(stderr, - "tail: warning: %ld bytes discarded\n", enomem); - rval = 1; - } - - /* - * Step through the blocks in the reverse order read. The last char - * is special, ignore whether newline or not. - */ - for (mark = tl;;) { - for (p = tl->l + (len = tl->len) - 1, llen = 0; len--; - --p, ++llen) - if (*p == '\n') { - if (llen) { - WR(p + 1, llen); - llen = 0; - } - if (tl == mark) - continue; - for (tr = tl->next; tr->len; tr = tr->next) { - WR(tr->l, tr->len); - tr->len = 0; - if (tr == mark) - break; - } - } - tl->len = llen; - if ((tl = tl->prev) == mark) - break; - } - tl = tl->next; - if (tl->len) { - WR(tl->l, tl->len); - tl->len = 0; - } - while ((tl = tl->next)->len) { - WR(tl->l, tl->len); - tl->len = 0; - } -} diff --git a/usr.bin/tail/tail.1 b/usr.bin/tail/tail.1 deleted file mode 100644 index 02bfba8..0000000 --- a/usr.bin/tail/tail.1 +++ /dev/null @@ -1,165 +0,0 @@ -.\" Copyright (c) 1980, 1990, 1991, 1993 -.\" The Regents of the University of California. All rights reserved. -.\" -.\" This code is derived from software contributed to Berkeley by -.\" the Institute of Electrical and Electronics Engineers, Inc. -.\" -.\" 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. -.\" -.\" @(#)tail.1 8.1 (Berkeley) 6/6/93 -.\" -.Dd June 6, 1993 -.Dt TAIL 1 -.Os BSD 4 -.Sh NAME -.Nm tail -.Nd display the last part of a file -.Sh SYNOPSIS -.Nm tail -.Op Fl f Li | Fl r -.Oo -.Fl b Ar number | -.Fl c Ar number | -.Fl n Ar number -.Oc -.Op Ar file ... -.Sh DESCRIPTION -The -.Nm tail -utility displays the contents of -.Ar file -or, by default, its standard input, to the standard output. -.Pp -The display begins at a byte, line or 512-byte block location in the -input. -Numbers having a leading plus (``+'') sign are relative to the beginning -of the input, for example, -.Dq -c +2 -starts the display at the second -byte of the input. -Numbers having a leading minus (``-'') sign or no explicit sign are -relative to the end of the input, for example, -.Dq -n 2 -displays the last two lines of the input. -The default starting location is -.Dq -n 10 , -or the last 10 lines of the input. -.Pp -The options are as follows: -.Bl -tag -width Ds -.It Fl b Ar number -The location is -.Ar number -512-byte blocks. -.It Fl c Ar number -The location is -.Ar number -bytes. -.It Fl f -The -.Fl f -option causes -.Nm tail -to not stop when end of file is reached, but rather to wait for additional -data to be appended to the input. -The -.Fl f -option is ignored if the standard input is a pipe, but not if it is a FIFO. -.It Fl n Ar number -The location is -.Ar number -lines. -.It Fl r -The -.Fl r -option causes the input to be displayed in reverse order, by line. -Additionally, this option changes the meaning of the -.Fl b , -.Fl c -and -.Fl n -options. -When the -.Fl r -option is specified, these options specify the number of bytes, lines -or 512-byte blocks to display, instead of the bytes, lines or blocks -from the beginning or end of the input from which to begin the display. -The default for the -.Fl r -option is to display all of the input. -.El -.Pp -If more than a single file is specified, each file is preceded by a -header consisting of the string -.Dq ==> XXX <== -where -.Dq XXX -is the name of the file. -.Pp -The -.Nm tail -utility exits 0 on success, and >0 if an error occurs. -.Sh SEE ALSO -.Xr cat 1 , -.Xr head 1 , -.Xr sed 1 -.Sh STANDARDS -The -.Nm tail -utility is expected to be a superset of the POSIX 1003.2 -specification. -In particular, the -.Fl b -and -.Fl r -options are extensions to that standard. -.Pp -The historic command line syntax of -.Nm tail -is supported by this implementation. -The only difference between this implementation and historic versions -of -.Nm tail , -once the command line syntax translation has been done, is that the -.Fl b , -.Fl c -and -.Fl n -options modify the -.Fl r -option, i.e. ``-r -c 4'' displays the last 4 characters of the last line -of the input, while the historic tail (using the historic syntax ``-4cr'') -would ignore the -.Fl c -option and display the last 4 lines of the input. -.Sh HISTORY -A -.Nm tail -command appeared in -.At v7 . diff --git a/usr.bin/tail/tail.c b/usr.bin/tail/tail.c deleted file mode 100644 index cc8ea14..0000000 --- a/usr.bin/tail/tail.c +++ /dev/null @@ -1,302 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Edward Sze-Tyan Wang. - * - * 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. - */ - -#ifndef lint -static char copyright[] = -"@(#) Copyright (c) 1991, 1993\n\ - The Regents of the University of California. All rights reserved.\n"; -#endif /* not lint */ - -#ifndef lint -static char sccsid[] = "@(#)tail.c 8.1 (Berkeley) 6/6/93"; -#endif /* not lint */ - -#include <sys/types.h> -#include <sys/stat.h> -#include <errno.h> -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "extern.h" - -int fflag, rflag, rval; -char *fname; - -static void obsolete __P((char **)); -static void usage __P((void)); - -int -main(argc, argv) - int argc; - char *argv[]; -{ - struct stat sb; - FILE *fp; - long off; - enum STYLE style; - int ch, first; - char *p; - - /* - * Tail's options are weird. First, -n10 is the same as -n-10, not - * -n+10. Second, the number options are 1 based and not offsets, - * so -n+1 is the first line, and -c-1 is the last byte. Third, the - * number options for the -r option specify the number of things that - * get displayed, not the starting point in the file. The one major - * incompatibility in this version as compared to historical versions - * is that the 'r' option couldn't be modified by the -lbc options, - * i.e. it was always done in lines. This version treats -rc as a - * number of characters in reverse order. Finally, the default for - * -r is the entire file, not 10 lines. - */ -#define ARG(units, forward, backward) { \ - if (style) \ - usage(); \ - off = strtol(optarg, &p, 10) * (units); \ - if (*p) \ - err(1, "illegal offset -- %s", optarg); \ - switch(optarg[0]) { \ - case '+': \ - if (off) \ - off -= (units); \ - style = (forward); \ - break; \ - case '-': \ - off = -off; \ - /* FALLTHROUGH */ \ - default: \ - style = (backward); \ - break; \ - } \ -} - - obsolete(argv); - style = NOTSET; - while ((ch = getopt(argc, argv, "b:c:fn:r")) != EOF) - switch(ch) { - case 'b': - ARG(512, FBYTES, RBYTES); - break; - case 'c': - ARG(1, FBYTES, RBYTES); - break; - case 'f': - fflag = 1; - break; - case 'n': - ARG(1, FLINES, RLINES); - break; - case 'r': - rflag = 1; - break; - case '?': - default: - usage(); - } - argc -= optind; - argv += optind; - - if (fflag && argc > 1) - err(1, "-f option only appropriate for a single file"); - - /* - * If displaying in reverse, don't permit follow option, and convert - * style values. - */ - if (rflag) { - if (fflag) - usage(); - if (style == FBYTES) - style = RBYTES; - else if (style == FLINES) - style = RLINES; - } - - /* - * If style not specified, the default is the whole file for -r, and - * the last 10 lines if not -r. - */ - if (style == NOTSET) - if (rflag) { - off = 0; - style = REVERSE; - } else { - off = 10; - style = RLINES; - } - - if (*argv) - for (first = 1; fname = *argv++;) { - if ((fp = fopen(fname, "r")) == NULL || - fstat(fileno(fp), &sb)) { - ierr(); - continue; - } - if (argc > 1) { - (void)printf("%s==> %s <==\n", - first ? "" : "\n", fname); - first = 0; - (void)fflush(stdout); - } - - if (rflag) - reverse(fp, style, off, &sb); - else - forward(fp, style, off, &sb); - (void)fclose(fp); - } - else { - fname = "stdin"; - - if (fstat(fileno(stdin), &sb)) { - ierr(); - exit(1); - } - - /* - * Determine if input is a pipe. 4.4BSD will set the SOCKET - * bit in the st_mode field for pipes. Fix this then. - */ - if (lseek(fileno(stdin), (off_t)0, SEEK_CUR) == -1 && - errno == ESPIPE) { - errno = 0; - fflag = 0; /* POSIX.2 requires this. */ - } - - if (rflag) - reverse(stdin, style, off, &sb); - else - forward(stdin, style, off, &sb); - } - exit(rval); -} - -/* - * Convert the obsolete argument form into something that getopt can handle. - * This means that anything of the form [+-][0-9][0-9]*[lbc][fr] that isn't - * the option argument for a -b, -c or -n option gets converted. - */ -static void -obsolete(argv) - char *argv[]; -{ - register char *ap, *p, *t; - int len; - char *start; - - while (ap = *++argv) { - /* Return if "--" or not an option of any form. */ - if (ap[0] != '-') { - if (ap[0] != '+') - return; - } else if (ap[1] == '-') - return; - - switch(*++ap) { - /* Old-style option. */ - case '0': case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': - - /* Malloc space for dash, new option and argument. */ - len = strlen(*argv); - if ((start = p = malloc(len + 3)) == NULL) - err(1, "%s", strerror(errno)); - *p++ = '-'; - - /* - * Go to the end of the option argument. Save off any - * trailing options (-3lf) and translate any trailing - * output style characters. - */ - t = *argv + len - 1; - if (*t == 'f' || *t == 'r') { - *p++ = *t; - *t-- = '\0'; - } - switch(*t) { - case 'b': - *p++ = 'b'; - *t = '\0'; - break; - case 'c': - *p++ = 'c'; - *t = '\0'; - break; - case 'l': - *t = '\0'; - /* FALLTHROUGH */ - case '0': case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': - *p++ = 'n'; - break; - default: - err(1, "illegal option -- %s", *argv); - } - *p++ = *argv[0]; - (void)strcpy(p, ap); - *argv = start; - continue; - - /* - * Options w/ arguments, skip the argument and continue - * with the next option. - */ - case 'b': - case 'c': - case 'n': - if (!ap[1]) - ++argv; - /* FALLTHROUGH */ - /* Options w/o arguments, continue with the next option. */ - case 'f': - case 'r': - continue; - - /* Illegal option, return and let getopt handle it. */ - default: - return; - } - } -} - -static void -usage() -{ - (void)fprintf(stderr, - "usage: tail [-f | -r] [-b # | -c # | -n #] [file ...]\n"); - exit(1); -} |
