Some busybox updates. See the changelog for details if you care.
-Erik
diff --git a/Changelog b/Changelog
index 673d1aa..4dbb46e 100644
--- a/Changelog
+++ b/Changelog
@@ -15,12 +15,23 @@
* Optional support contributed by Ben Collins <bcollins@debian.org>
for the kernel init chroot patch by Werner Almesberger, which
allows init to chroot to a new device, and umount the old one.
- * added (and documented) "-n" option for head -
- contributed Friedrich Vedder <fwv@myrtle.lahn.de>
- * Cleanup for a number of usage messages -- also
- contributed Friedrich Vedder <fwv@myrtle.lahn.de>
* Fixed bug that wouldn't let one chown a symlink -- it would
always dereference before. -beppu
+ * Fixed a bug where init could have reference already freed memory.
+ Found and fixed by Taketoshi Sano <kgh12351@nifty.ne.jp>
+ * Several contributions from Friedrich Vedder <fwv@myrtle.lahn.de>
+ * added (and documented) "-n" option for head -
+ * Cleanup for a number of usage messages -- also
+ contributed Friedrich Vedder <fwv@myrtle.lahn.de>
+ * Cosmetic fix to busybox.c (Don't print a comma at the
+ end of line if there are no more application names).
+ * Fixed a stupid bug in "head" option handling ("head -n" would segfault).
+ * Moved commonly used functions "xmalloc()" and "exit()"
+ to utility.c (with proper #ifdef's).
+ * Created a tiny tail implementation, removing -c, -q, -v, and making
+ tail -f work only with a single file. This reduced tail
+ from 6k to 2.4k. The bigger/more featured tail can still be
+ had by disabling BB_FEATURE_SIMPLE_TAIL in dusybox.defs.h
-Erik Andersen
diff --git a/applets/busybox.c b/applets/busybox.c
index 67485de..d59b285 100644
--- a/applets/busybox.c
+++ b/applets/busybox.c
@@ -83,7 +83,7 @@
#ifdef BB_FREE //usr/bin
{"free", free_main},
#endif
-#ifdef BB_DEALLOCVT //usr/bin
+#ifdef BB_DEALLOCVT //usr/bin
{"deallocvt", deallocvt_main},
#endif
#ifdef BB_FSCK_MINIX //sbin
@@ -328,7 +328,7 @@
while (a->name != 0) {
col+=fprintf(stderr, "%s%s", ((col==0)? "\t":", "), (a++)->name);
- if (col>60) {
+ if (col>60 && a->name != 0) {
fprintf(stderr, ",\n");
col=0;
}
diff --git a/archival/gunzip.c b/archival/gunzip.c
index 84f5d02..fddcc76 100644
--- a/archival/gunzip.c
+++ b/archival/gunzip.c
@@ -321,6 +321,9 @@
#define WARN(msg) {fprintf msg ; \
if (exit_code == OK) exit_code = WARNING;}
+#define do_exit(c) exit(c)
+
+
/* in unzip.c */
extern int unzip OF((int in, int out));
@@ -359,7 +362,6 @@
extern void warn OF((char *a, char *b));
extern void read_error OF((void));
extern void write_error OF((void));
-extern voidp xmalloc OF((unsigned int size));
/* in inflate.c */
extern int inflate OF((void));
@@ -679,7 +681,6 @@
/* local functions */
local int get_method OF((int in));
-local void do_exit(int exitcode) __attribute__ ((noreturn));
#define strequ(s1, s2) (strcmp((s1),(s2)) == 0)
@@ -927,30 +928,6 @@
}
}
-
-/* ========================================================================
- * Free all dynamically allocated variables and exit with the given code.
- */
-local void do_exit(exitcode)
- int exitcode;
-{
- static int in_exit = 0;
-
- if (in_exit) exit(exitcode);
- in_exit = 1;
- FREE(inbuf);
- FREE(outbuf);
- FREE(d_buf);
- FREE(window);
-#ifndef MAXSEG_64K
- FREE(tab_prefix);
-#else
- FREE(tab_prefix0);
- FREE(tab_prefix1);
-#endif
- exit(exitcode);
-}
-
/* ========================================================================
* Signal and error handler.
*/
@@ -1284,13 +1261,6 @@
/* ========================================================================
* Error handlers.
*/
-void error(m)
- char *m;
-{
- fprintf(stderr, "\n%s\n", m);
- abort_gzip();
-}
-
void warn(a, b)
char *a, *b; /* message strings juxtaposed in output */
{
@@ -1317,18 +1287,6 @@
/* ========================================================================
- * Semi-safe malloc -- never returns NULL.
- */
-voidp xmalloc (size)
- unsigned size;
-{
- voidp cp = (voidp)malloc (size);
-
- if (cp == NULL) error("out of memory");
- return cp;
-}
-
-/* ========================================================================
* Table of CRC-32's of all single-byte values (made by makecrc.c)
*/
static const ulg crc_32_tab[] = {
diff --git a/archival/gzip.c b/archival/gzip.c
index 76df3ad..3438ee4 100644
--- a/archival/gzip.c
+++ b/archival/gzip.c
@@ -277,7 +277,8 @@
#define WARN(msg) {if (!quiet) fprintf msg ; \
if (exit_code == OK) exit_code = WARNING;}
-local void do_exit(int exitcode) __attribute__ ((noreturn));
+#define do_exit(c) exit(c)
+
/* in zip.c: */
extern int zip OF((int in, int out));
@@ -328,7 +329,6 @@
extern void read_error OF((void));
extern void write_error OF((void));
extern void display_ratio OF((long num, long den, FILE *file));
-extern voidp xmalloc OF((unsigned int size));
/* in inflate.c */
extern int inflate OF((void));
@@ -1912,29 +1912,6 @@
do_exit(exit_code);
}
-/* ========================================================================
- * Free all dynamically allocated variables and exit with the given code.
- */
-local void do_exit(int exitcode)
-{
- static int in_exit = 0;
-
- if (in_exit) exit(exitcode);
- in_exit = 1;
- if (env != NULL) free(env), env = NULL;
- if (args != NULL) free((char*)args), args = NULL;
- FREE(inbuf);
- FREE(outbuf);
- FREE(d_buf);
- FREE(window);
-#ifndef MAXSEG_64K
- FREE(tab_prefix);
-#else
- FREE(tab_prefix0);
- FREE(tab_prefix1);
-#endif
- exit(exitcode);
-}
/* trees.c -- output deflated data using Huffman coding
* Copyright (C) 1992-1993 Jean-loup Gailly
* This is free software; you can redistribute it and/or modify it under the
diff --git a/busybox.c b/busybox.c
index 67485de..d59b285 100644
--- a/busybox.c
+++ b/busybox.c
@@ -83,7 +83,7 @@
#ifdef BB_FREE //usr/bin
{"free", free_main},
#endif
-#ifdef BB_DEALLOCVT //usr/bin
+#ifdef BB_DEALLOCVT //usr/bin
{"deallocvt", deallocvt_main},
#endif
#ifdef BB_FSCK_MINIX //sbin
@@ -328,7 +328,7 @@
while (a->name != 0) {
col+=fprintf(stderr, "%s%s", ((col==0)? "\t":", "), (a++)->name);
- if (col>60) {
+ if (col>60 && a->name != 0) {
fprintf(stderr, ",\n");
col=0;
}
diff --git a/busybox.def.h b/busybox.def.h
index c56f151..8adccdc 100644
--- a/busybox.def.h
+++ b/busybox.def.h
@@ -133,6 +133,11 @@
//Enable init being called as /linuxrc
#define BB_FEATURE_LINUXRC
//
+//
+//Simple tail implementation (2k vs 6k for the full one). Still
+//provides 'tail -f' support -- but for only one file at a time.
+#define BB_FEATURE_SIMPLE_TAIL
+//
// Enable support for loop devices in mount
#define BB_FEATURE_MOUNT_LOOP
//
diff --git a/coreutils/head.c b/coreutils/head.c
index 4e58bdc..bc7f354 100644
--- a/coreutils/head.c
+++ b/coreutils/head.c
@@ -61,7 +61,7 @@
switch (opt) {
case 'n':
tmplen = 0;
- if (i++ < argc)
+ if (++i < argc)
tmplen = atoi(argv[i]);
if (tmplen < 1)
usage(head_usage);
@@ -105,4 +105,4 @@
exit(0);
}
-/* $Id: head.c,v 1.5 2000/01/23 18:19:02 erik Exp $ */
+/* $Id: head.c,v 1.6 2000/01/25 18:13:53 erik Exp $ */
diff --git a/coreutils/printf.c b/coreutils/printf.c
index 02d0811..5be3a67 100644
--- a/coreutils/printf.c
+++ b/coreutils/printf.c
@@ -121,8 +121,6 @@
#define hextobin(c) ((c)>='a'&&(c)<='f' ? (c)-'a'+10 : (c)>='A'&&(c)<='F' ? (c)-'A'+10 : (c)-'0')
#define octtobin(c) ((c) - '0')
-char *xmalloc ();
-
static double xstrtod __P ((char *s));
static int print_esc __P ((char *escstart));
static int print_formatted __P ((char *format, int argc, char **argv));
diff --git a/coreutils/tail.c b/coreutils/tail.c
index 697177d..5198892 100644
--- a/coreutils/tail.c
+++ b/coreutils/tail.c
@@ -1,3 +1,402 @@
+#include "internal.h"
+/* This file contains _two_ implementations of tail. One is
+ * a bit more full featured, but costs 6k. The other (i.e. the
+ * SIMPLE_TAIL one) is less capable, but is good enough for about
+ * 99% of the things folks want to use tail for, and only costs 2k.
+ */
+
+
+#ifdef BB_FEATURE_SIMPLE_TAIL
+
+/* tail -- output the last part of file(s)
+ Copyright (C) 89, 90, 91, 95, 1996 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+ Original version by Paul Rubin <phr@ocf.berkeley.edu>.
+ Extensions by David MacKenzie <djm@gnu.ai.mit.edu>.
+ tail -f for multiple files by Ian Lance Taylor <ian@airs.com>.
+
+ Rewrote the option parser, removed locales support,
+ and generally busyboxed, Erik Andersen <andersen@lineo.com>
+
+ Removed superfluous options and associated code ("-c", "-n", "-q").
+ Removed "tail -f" suport for multiple files.
+ Both changes by Friedrich Vedder <fwv@myrtle.lahn.de>.
+
+ */
+
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <ctype.h>
+
+
+#define XWRITE(fd, buffer, n_bytes) \
+ do { \
+ if (n_bytes > 0 && fwrite ((buffer), 1, (n_bytes), stdout) == 0) \
+ error("write error"); \
+ } while (0)
+
+/* Number of items to tail. */
+#define DEFAULT_N_LINES 10
+
+/* Size of atomic reads. */
+#ifndef BUFSIZ
+#define BUFSIZ (512 * 8)
+#endif
+
+/* If nonzero, read from the end of one file until killed. */
+static int forever;
+
+/* If nonzero, print filename headers. */
+static int print_headers;
+
+const char tail_usage[] =
+ "tail [OPTION] [FILE]...\n\n"
+ "Print last 10 lines of each FILE to standard output.\n"
+ "With more than one FILE, precede each with a header giving the\n"
+ "file name. With no FILE, or when FILE is -, read standard input.\n\n"
+ "Options:\n"
+ "\t-n NUM\t\tPrint last NUM lines instead of first 10\n"
+ "\t-f\t\tOutput data as the file grows. This version\n"
+ "\t\t\tof 'tail -f' supports only one file at a time.\n";
+
+
+static void write_header(const char *filename)
+{
+ static int first_file = 1;
+
+ printf("%s==> %s <==\n", (first_file ? "" : "\n"), filename);
+ first_file = 0;
+}
+
+/* Print the last N_LINES lines from the end of file FD.
+ Go backward through the file, reading `BUFSIZ' bytes at a time (except
+ probably the first), until we hit the start of the file or have
+ read NUMBER newlines.
+ POS starts out as the length of the file (the offset of the last
+ byte of the file + 1).
+ Return 0 if successful, 1 if an error occurred. */
+
+static int
+file_lines(const char *filename, int fd, long int n_lines, off_t pos)
+{
+ char buffer[BUFSIZ];
+ int bytes_read;
+ int i; /* Index into `buffer' for scanning. */
+
+ if (n_lines == 0)
+ return 0;
+
+ /* Set `bytes_read' to the size of the last, probably partial, buffer;
+ 0 < `bytes_read' <= `BUFSIZ'. */
+ bytes_read = pos % BUFSIZ;
+ if (bytes_read == 0)
+ bytes_read = BUFSIZ;
+ /* Make `pos' a multiple of `BUFSIZ' (0 if the file is short), so that all
+ reads will be on block boundaries, which might increase efficiency. */
+ pos -= bytes_read;
+ lseek(fd, pos, SEEK_SET);
+ bytes_read = fullRead(fd, buffer, bytes_read);
+ if (bytes_read == -1)
+ error("read error");
+
+ /* Count the incomplete line on files that don't end with a newline. */
+ if (bytes_read && buffer[bytes_read - 1] != '\n')
+ --n_lines;
+
+ do {
+ /* Scan backward, counting the newlines in this bufferfull. */
+ for (i = bytes_read - 1; i >= 0; i--) {
+ /* Have we counted the requested number of newlines yet? */
+ if (buffer[i] == '\n' && n_lines-- == 0) {
+ /* If this newline wasn't the last character in the buffer,
+ print the text after it. */
+ if (i != bytes_read - 1)
+ XWRITE(STDOUT_FILENO, &buffer[i + 1],
+ bytes_read - (i + 1));
+ return 0;
+ }
+ }
+ /* Not enough newlines in that bufferfull. */
+ if (pos == 0) {
+ /* Not enough lines in the file; print the entire file. */
+ lseek(fd, (off_t) 0, SEEK_SET);
+ return 0;
+ }
+ pos -= BUFSIZ;
+ lseek(fd, pos, SEEK_SET);
+ }
+ while ((bytes_read = fullRead(fd, buffer, BUFSIZ)) > 0);
+ if (bytes_read == -1)
+ error("read error");
+
+ return 0;
+}
+
+/* Print the last N_LINES lines from the end of the standard input,
+ open for reading as pipe FD.
+ Buffer the text as a linked list of LBUFFERs, adding them as needed.
+ Return 0 if successful, 1 if an error occured. */
+
+static int pipe_lines(const char *filename, int fd, long int n_lines)
+{
+ struct linebuffer {
+ int nbytes, nlines;
+ char buffer[BUFSIZ];
+ struct linebuffer *next;
+ };
+ typedef struct linebuffer LBUFFER;
+ LBUFFER *first, *last, *tmp;
+ int i; /* Index into buffers. */
+ int total_lines = 0; /* Total number of newlines in all buffers. */
+ int errors = 0;
+
+ first = last = (LBUFFER *) xmalloc(sizeof(LBUFFER));
+ first->nbytes = first->nlines = 0;
+ first->next = NULL;
+ tmp = (LBUFFER *) xmalloc(sizeof(LBUFFER));
+
+ /* Input is always read into a fresh buffer. */
+ while ((tmp->nbytes = fullRead(fd, tmp->buffer, BUFSIZ)) > 0) {
+ tmp->nlines = 0;
+ tmp->next = NULL;
+
+ /* Count the number of newlines just read. */
+ for (i = 0; i < tmp->nbytes; i++)
+ if (tmp->buffer[i] == '\n')
+ ++tmp->nlines;
+ total_lines += tmp->nlines;
+
+ /* If there is enough room in the last buffer read, just append the new
+ one to it. This is because when reading from a pipe, `nbytes' can
+ often be very small. */
+ if (tmp->nbytes + last->nbytes < BUFSIZ) {
+ memcpy(&last->buffer[last->nbytes], tmp->buffer, tmp->nbytes);
+ last->nbytes += tmp->nbytes;
+ last->nlines += tmp->nlines;
+ } else {
+ /* If there's not enough room, link the new buffer onto the end of
+ the list, then either free up the oldest buffer for the next
+ read if that would leave enough lines, or else malloc a new one.
+ Some compaction mechanism is possible but probably not
+ worthwhile. */
+ last = last->next = tmp;
+ if (total_lines - first->nlines > n_lines) {
+ tmp = first;
+ total_lines -= first->nlines;
+ first = first->next;
+ } else
+ tmp = (LBUFFER *) xmalloc(sizeof(LBUFFER));
+ }
+ }
+ if (tmp->nbytes == -1)
+ error("read error");
+
+ free((char *) tmp);
+
+ /* This prevents a core dump when the pipe contains no newlines. */
+ if (n_lines == 0)
+ goto free_lbuffers;
+
+ /* Count the incomplete line on files that don't end with a newline. */
+ if (last->buffer[last->nbytes - 1] != '\n') {
+ ++last->nlines;
+ ++total_lines;
+ }
+
+ /* Run through the list, printing lines. First, skip over unneeded
+ buffers. */
+ for (tmp = first; total_lines - tmp->nlines > n_lines; tmp = tmp->next)
+ total_lines -= tmp->nlines;
+
+ /* Find the correct beginning, then print the rest of the file. */
+ if (total_lines > n_lines) {
+ char *cp;
+
+ /* Skip `total_lines' - `n_lines' newlines. We made sure that
+ `total_lines' - `n_lines' <= `tmp->nlines'. */
+ cp = tmp->buffer;
+ for (i = total_lines - n_lines; i; --i)
+ while (*cp++ != '\n')
+ /* Do nothing. */ ;
+ i = cp - tmp->buffer;
+ } else
+ i = 0;
+ XWRITE(STDOUT_FILENO, &tmp->buffer[i], tmp->nbytes - i);
+
+ for (tmp = tmp->next; tmp; tmp = tmp->next)
+ XWRITE(STDOUT_FILENO, tmp->buffer, tmp->nbytes);
+
+ free_lbuffers:
+ while (first) {
+ tmp = first->next;
+ free((char *) first);
+ first = tmp;
+ }
+ return errors;
+}
+
+/* Display file FILENAME from the current position in FD to the end.
+ If `forever' is nonzero, keep reading from the end of the file
+ until killed. Return the number of bytes read from the file. */
+
+static long dump_remainder(const char *filename, int fd)
+{
+ char buffer[BUFSIZ];
+ int bytes_read;
+ long total;
+
+ total = 0;
+ output:
+ while ((bytes_read = fullRead(fd, buffer, BUFSIZ)) > 0) {
+ XWRITE(STDOUT_FILENO, buffer, bytes_read);
+ total += bytes_read;
+ }
+ if (bytes_read == -1)
+ error("read error");
+ if (forever) {
+ fflush(stdout);
+ sleep(1);
+ goto output;
+ }
+
+ return total;
+}
+
+/* Output the last N_LINES lines of file FILENAME open for reading in FD.
+ Return 0 if successful, 1 if an error occurred. */
+
+static int tail_lines(const char *filename, int fd, long int n_lines)
+{
+ struct stat stats;
+ off_t length;
+
+ if (print_headers)
+ write_header(filename);
+
+ if (fstat(fd, &stats))
+ error("fstat error");
+
+ /* Use file_lines only if FD refers to a regular file with
+ its file pointer positioned at beginning of file. */
+ /* FIXME: adding the lseek conjunct is a kludge.
+ Once there's a reasonable test suite, fix the true culprit:
+ file_lines. file_lines shouldn't presume that the input
+ file pointer is initially positioned to beginning of file. */
+ if (S_ISREG(stats.st_mode)
+ && lseek(fd, (off_t) 0, SEEK_CUR) == (off_t) 0) {
+ length = lseek(fd, (off_t) 0, SEEK_END);
+ if (length != 0 && file_lines(filename, fd, n_lines, length))
+ return 1;
+ dump_remainder(filename, fd);
+ } else
+ return pipe_lines(filename, fd, n_lines);
+
+ return 0;
+}
+
+/* Display the last N_UNITS lines of file FILENAME.
+ "-" for FILENAME means the standard input.
+ Return 0 if successful, 1 if an error occurred. */
+
+static int tail_file(const char *filename, off_t n_units)
+{
+ int fd, errors;
+
+ if (!strcmp(filename, "-")) {
+ filename = "standard input";
+ errors = tail_lines(filename, 0, (long) n_units);
+ } else {
+ /* Not standard input. */
+ fd = open(filename, O_RDONLY);
+ if (fd == -1)
+ error("open error");
+
+ errors = tail_lines(filename, fd, (long) n_units);
+ close(fd);
+ }
+
+ return errors;
+}
+
+extern int tail_main(int argc, char **argv)
+{
+ int exit_status = 0;
+ int n_units = DEFAULT_N_LINES;
+ int n_tmp, i;
+ char opt;
+
+ forever = print_headers = 0;
+
+ /* parse argv[] */
+ for (i = 1; i < argc; i++) {
+ if (argv[i][0] == '-') {
+ opt = argv[i][1];
+ switch (opt) {
+ case 'f':
+ forever = 1;
+ break;
+ case 'n':
+ n_tmp = 0;
+ if (++i < argc)
+ n_tmp = atoi(argv[i]);
+ if (n_tmp < 1)
+ usage(tail_usage);
+ n_units = n_tmp;
+ break;
+ case '-':
+ case 'h':
+ usage(tail_usage);
+ default:
+ fprintf(stderr, "tail: invalid option -- %c\n", opt);
+ usage(tail_usage);
+ }
+ } else {
+ break;
+ }
+ }
+
+ if (i + 1 < argc) {
+ if (forever) {
+ fprintf(stderr,
+ "tail: option -f is invalid with multiple files\n");
+ usage(tail_usage);
+ }
+ print_headers = 1;
+ }
+
+ if (i >= argc) {
+ exit_status |= tail_file("-", n_units);
+ } else {
+ for (; i < argc; i++)
+ exit_status |= tail_file(argv[i], n_units);
+ }
+
+ exit(exit_status == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
+}
+
+
+#else
+// Here follows the code for the full featured tail code
+
+
/* tail -- output the last part of file(s)
Copyright (C) 89, 90, 91, 95, 1996 Free Software Foundation, Inc.
@@ -42,7 +441,7 @@
#define NDEBUG 1
-static void error(int i, int errnum, char* fmt, ...)
+static void detailed_error(int i, int errnum, char* fmt, ...)
{
va_list arguments;
@@ -60,7 +459,7 @@
assert ((fd) == 1); \
assert ((n_bytes) >= 0); \
if (n_bytes > 0 && fwrite ((buffer), 1, (n_bytes), stdout) == 0) \
- error (EXIT_FAILURE, errno, "write error"); \
+ detailed_error (EXIT_FAILURE, errno, "write error"); \
} \
while (0)
@@ -100,8 +499,6 @@
multiple_files, always, never
};
-char *xmalloc ();
-
/* The name this program was run with. */
char *program_name;
@@ -168,7 +565,7 @@
bytes_read = fullRead (fd, buffer, bytes_read);
if (bytes_read == -1)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
@@ -204,7 +601,7 @@
while ((bytes_read = fullRead (fd, buffer, BUFSIZ)) > 0);
if (bytes_read == -1)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
return 0;
@@ -276,7 +673,7 @@
}
if (tmp->nbytes == -1)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
errors = 1;
free ((char *) tmp);
goto free_lbuffers;
@@ -390,7 +787,7 @@
}
if (tmp->nbytes == -1)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
errors = 1;
free ((char *) tmp);
goto free_cbuffers;
@@ -438,7 +835,7 @@
n_bytes -= bytes_read;
if (bytes_read == -1)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
else if (n_bytes < 0)
@@ -466,7 +863,7 @@
}
if (bytes_read == -1)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
else if (bytes_to_skip < bytes_read)
@@ -496,7 +893,7 @@
total += bytes_read;
}
if (bytes_read == -1)
- error (EXIT_FAILURE, errno, "%s", filename);
+ detailed_error (EXIT_FAILURE, errno, "%s", filename);
if (forever)
{
fflush (stdout);
@@ -540,7 +937,7 @@
continue;
if (fstat (file_descs[i], &stats) < 0)
{
- error (0, errno, "%s", names[i]);
+ detailed_error (0, errno, "%s", names[i]);
file_descs[i] = -1;
continue;
}
@@ -590,7 +987,7 @@
error, either. */
if (fstat (fd, &stats))
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
@@ -619,7 +1016,7 @@
}
else
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
@@ -656,7 +1053,7 @@
if (fstat (fd, &stats))
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
@@ -723,12 +1120,12 @@
{
if (fstat (0, &stats) < 0)
{
- error (0, errno, "standard input");
+ detailed_error (0, errno, "standard input");
errors = 1;
}
else if (!S_ISREG (stats.st_mode))
{
- error (0, 0,
+ detailed_error (0, 0,
"standard input: cannot follow end of non-regular file");
errors = 1;
}
@@ -749,7 +1146,7 @@
{
if (forever_multiple)
file_descs[filenum] = -1;
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
errors = 1;
}
else
@@ -761,12 +1158,12 @@
{
if (fstat (fd, &stats) < 0)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
errors = 1;
}
else if (!S_ISREG (stats.st_mode))
{
- error (0, 0, "%s: cannot follow end of non-regular file",
+ detailed_error (0, 0, "%s: cannot follow end of non-regular file",
filename);
errors = 1;
}
@@ -785,7 +1182,7 @@
{
if (close (fd))
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
errors = 1;
}
}
@@ -903,8 +1300,11 @@
}
if (have_read_stdin && close (0) < 0)
- error (EXIT_FAILURE, errno, "-");
+ detailed_error (EXIT_FAILURE, errno, "-");
if (fclose (stdout) == EOF)
- error (EXIT_FAILURE, errno, "write error");
+ detailed_error (EXIT_FAILURE, errno, "write error");
exit (exit_status == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}
+
+
+#endif
diff --git a/gunzip.c b/gunzip.c
index 84f5d02..fddcc76 100644
--- a/gunzip.c
+++ b/gunzip.c
@@ -321,6 +321,9 @@
#define WARN(msg) {fprintf msg ; \
if (exit_code == OK) exit_code = WARNING;}
+#define do_exit(c) exit(c)
+
+
/* in unzip.c */
extern int unzip OF((int in, int out));
@@ -359,7 +362,6 @@
extern void warn OF((char *a, char *b));
extern void read_error OF((void));
extern void write_error OF((void));
-extern voidp xmalloc OF((unsigned int size));
/* in inflate.c */
extern int inflate OF((void));
@@ -679,7 +681,6 @@
/* local functions */
local int get_method OF((int in));
-local void do_exit(int exitcode) __attribute__ ((noreturn));
#define strequ(s1, s2) (strcmp((s1),(s2)) == 0)
@@ -927,30 +928,6 @@
}
}
-
-/* ========================================================================
- * Free all dynamically allocated variables and exit with the given code.
- */
-local void do_exit(exitcode)
- int exitcode;
-{
- static int in_exit = 0;
-
- if (in_exit) exit(exitcode);
- in_exit = 1;
- FREE(inbuf);
- FREE(outbuf);
- FREE(d_buf);
- FREE(window);
-#ifndef MAXSEG_64K
- FREE(tab_prefix);
-#else
- FREE(tab_prefix0);
- FREE(tab_prefix1);
-#endif
- exit(exitcode);
-}
-
/* ========================================================================
* Signal and error handler.
*/
@@ -1284,13 +1261,6 @@
/* ========================================================================
* Error handlers.
*/
-void error(m)
- char *m;
-{
- fprintf(stderr, "\n%s\n", m);
- abort_gzip();
-}
-
void warn(a, b)
char *a, *b; /* message strings juxtaposed in output */
{
@@ -1317,18 +1287,6 @@
/* ========================================================================
- * Semi-safe malloc -- never returns NULL.
- */
-voidp xmalloc (size)
- unsigned size;
-{
- voidp cp = (voidp)malloc (size);
-
- if (cp == NULL) error("out of memory");
- return cp;
-}
-
-/* ========================================================================
* Table of CRC-32's of all single-byte values (made by makecrc.c)
*/
static const ulg crc_32_tab[] = {
diff --git a/gzip.c b/gzip.c
index 76df3ad..3438ee4 100644
--- a/gzip.c
+++ b/gzip.c
@@ -277,7 +277,8 @@
#define WARN(msg) {if (!quiet) fprintf msg ; \
if (exit_code == OK) exit_code = WARNING;}
-local void do_exit(int exitcode) __attribute__ ((noreturn));
+#define do_exit(c) exit(c)
+
/* in zip.c: */
extern int zip OF((int in, int out));
@@ -328,7 +329,6 @@
extern void read_error OF((void));
extern void write_error OF((void));
extern void display_ratio OF((long num, long den, FILE *file));
-extern voidp xmalloc OF((unsigned int size));
/* in inflate.c */
extern int inflate OF((void));
@@ -1912,29 +1912,6 @@
do_exit(exit_code);
}
-/* ========================================================================
- * Free all dynamically allocated variables and exit with the given code.
- */
-local void do_exit(int exitcode)
-{
- static int in_exit = 0;
-
- if (in_exit) exit(exitcode);
- in_exit = 1;
- if (env != NULL) free(env), env = NULL;
- if (args != NULL) free((char*)args), args = NULL;
- FREE(inbuf);
- FREE(outbuf);
- FREE(d_buf);
- FREE(window);
-#ifndef MAXSEG_64K
- FREE(tab_prefix);
-#else
- FREE(tab_prefix0);
- FREE(tab_prefix1);
-#endif
- exit(exitcode);
-}
/* trees.c -- output deflated data using Huffman coding
* Copyright (C) 1992-1993 Jean-loup Gailly
* This is free software; you can redistribute it and/or modify it under the
diff --git a/head.c b/head.c
index 4e58bdc..bc7f354 100644
--- a/head.c
+++ b/head.c
@@ -61,7 +61,7 @@
switch (opt) {
case 'n':
tmplen = 0;
- if (i++ < argc)
+ if (++i < argc)
tmplen = atoi(argv[i]);
if (tmplen < 1)
usage(head_usage);
@@ -105,4 +105,4 @@
exit(0);
}
-/* $Id: head.c,v 1.5 2000/01/23 18:19:02 erik Exp $ */
+/* $Id: head.c,v 1.6 2000/01/25 18:13:53 erik Exp $ */
diff --git a/init.c b/init.c
index b0a8582..5b80cc5 100644
--- a/init.c
+++ b/init.c
@@ -488,9 +488,14 @@
static void halt_signal(int sig)
{
shutdown_system();
- message(CONSOLE,
- "The system is halted. Press CTRL-ALT-DEL or turn off power\r\n");
+ message(CONSOLE, "The system is halted. Press %s or turn off power\r\n",
+ (secondConsole == NULL) /* serial console */
+ ? "Reset" : "CTRL-ALT-DEL");
sync();
+
+ /* allow time for last message to reach serial console */
+ sleep(2);
+
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
if (sig == SIGUSR2)
reboot(RB_POWER_OFF);
@@ -505,6 +510,10 @@
shutdown_system();
message(CONSOLE, "Please stand by while rebooting the system.\r\n");
sync();
+
+ /* allow time for last message to reach serial console */
+ sleep(2);
+
reboot(RB_AUTOBOOT);
exit(0);
}
@@ -580,7 +589,9 @@
/* execute init in the (hopefully) new root */
execve("/sbin/init",argv_init,envp_init);
- message(CONSOLE, "ERROR: Could not exec new init. Hit ctrl+alt+delete to reboot.\r\n");
+ message(CONSOLE, "ERROR: Could not exec new init. Press %s to reboot.\r\n",
+ (secondConsole == NULL) /* serial console */
+ ? "Reset" : "CTRL-ALT-DEL");
return;
}
#endif /* BB_FEATURE_INIT_CHROOT */
@@ -592,11 +603,14 @@
{
initAction* newAction;
+ if (*cons == '\0')
+ cons = console;
+
/* If BusyBox detects that a serial console is in use,
- * then entries containing non-empty id fields will _not_ be run.
+ * then entries not refering to the console or null devices will _not_ be run.
* The exception to this rule is the null device.
*/
- if (secondConsole == NULL && (*cons != '\0' || strncmp(cons, "null", 4)))
+ if (secondConsole == NULL && strcmp(cons, console) && strcmp(cons, "/dev/null"))
return;
newAction = calloc ((size_t)(1), sizeof(initAction));
@@ -608,10 +622,7 @@
initActionList = newAction;
strncpy( newAction->process, process, 255);
newAction->action = action;
- if (*cons != '\0') {
- strncpy(newAction->console, cons, 255);
- } else
- strncpy(newAction->console, console, 255);
+ strncpy(newAction->console, cons, 255);
newAction->pid = 0;
// message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n",
// newAction->process, newAction->action, newAction->console);
@@ -620,9 +631,13 @@
void delete_initAction (initAction *action)
{
initAction *a, *b=NULL;
- for( a=initActionList ; a; b=a, a=a->nextPtr) {
- if (a == action && b != NULL) {
- b->nextPtr=a->nextPtr;
+ for( a=initActionList ; a ; b=a, a=a->nextPtr) {
+ if (a == action) {
+ if (b==NULL) {
+ initActionList=a->nextPtr;
+ } else {
+ b->nextPtr=a->nextPtr;
+ }
free( a);
break;
}
@@ -805,8 +820,8 @@
/* Ask first then start a shell on tty2 */
if (secondConsole != NULL)
new_initAction( ASKFIRST, SHELL, secondConsole);
- /* Ask first then start a shell on tty1 */
- new_initAction( ASKFIRST, SHELL, console);
+ /* Start a shell on tty1 */
+ new_initAction( RESPAWN, SHELL, console);
} else {
/* Not in single user mode -- see what inittab says */
diff --git a/init/init.c b/init/init.c
index b0a8582..5b80cc5 100644
--- a/init/init.c
+++ b/init/init.c
@@ -488,9 +488,14 @@
static void halt_signal(int sig)
{
shutdown_system();
- message(CONSOLE,
- "The system is halted. Press CTRL-ALT-DEL or turn off power\r\n");
+ message(CONSOLE, "The system is halted. Press %s or turn off power\r\n",
+ (secondConsole == NULL) /* serial console */
+ ? "Reset" : "CTRL-ALT-DEL");
sync();
+
+ /* allow time for last message to reach serial console */
+ sleep(2);
+
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
if (sig == SIGUSR2)
reboot(RB_POWER_OFF);
@@ -505,6 +510,10 @@
shutdown_system();
message(CONSOLE, "Please stand by while rebooting the system.\r\n");
sync();
+
+ /* allow time for last message to reach serial console */
+ sleep(2);
+
reboot(RB_AUTOBOOT);
exit(0);
}
@@ -580,7 +589,9 @@
/* execute init in the (hopefully) new root */
execve("/sbin/init",argv_init,envp_init);
- message(CONSOLE, "ERROR: Could not exec new init. Hit ctrl+alt+delete to reboot.\r\n");
+ message(CONSOLE, "ERROR: Could not exec new init. Press %s to reboot.\r\n",
+ (secondConsole == NULL) /* serial console */
+ ? "Reset" : "CTRL-ALT-DEL");
return;
}
#endif /* BB_FEATURE_INIT_CHROOT */
@@ -592,11 +603,14 @@
{
initAction* newAction;
+ if (*cons == '\0')
+ cons = console;
+
/* If BusyBox detects that a serial console is in use,
- * then entries containing non-empty id fields will _not_ be run.
+ * then entries not refering to the console or null devices will _not_ be run.
* The exception to this rule is the null device.
*/
- if (secondConsole == NULL && (*cons != '\0' || strncmp(cons, "null", 4)))
+ if (secondConsole == NULL && strcmp(cons, console) && strcmp(cons, "/dev/null"))
return;
newAction = calloc ((size_t)(1), sizeof(initAction));
@@ -608,10 +622,7 @@
initActionList = newAction;
strncpy( newAction->process, process, 255);
newAction->action = action;
- if (*cons != '\0') {
- strncpy(newAction->console, cons, 255);
- } else
- strncpy(newAction->console, console, 255);
+ strncpy(newAction->console, cons, 255);
newAction->pid = 0;
// message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n",
// newAction->process, newAction->action, newAction->console);
@@ -620,9 +631,13 @@
void delete_initAction (initAction *action)
{
initAction *a, *b=NULL;
- for( a=initActionList ; a; b=a, a=a->nextPtr) {
- if (a == action && b != NULL) {
- b->nextPtr=a->nextPtr;
+ for( a=initActionList ; a ; b=a, a=a->nextPtr) {
+ if (a == action) {
+ if (b==NULL) {
+ initActionList=a->nextPtr;
+ } else {
+ b->nextPtr=a->nextPtr;
+ }
free( a);
break;
}
@@ -805,8 +820,8 @@
/* Ask first then start a shell on tty2 */
if (secondConsole != NULL)
new_initAction( ASKFIRST, SHELL, secondConsole);
- /* Ask first then start a shell on tty1 */
- new_initAction( ASKFIRST, SHELL, console);
+ /* Start a shell on tty1 */
+ new_initAction( RESPAWN, SHELL, console);
} else {
/* Not in single user mode -- see what inittab says */
diff --git a/internal.h b/internal.h
index b77feab..500a63e 100644
--- a/internal.h
+++ b/internal.h
@@ -175,6 +175,11 @@
extern long getNum (const char *cp);
extern pid_t findInitPid();
+#if defined BB_GUNZIP || defined BB_GZIP || defined BB_PRINTF || defined BB_TAIL
+extern void *xmalloc (size_t size);
+extern void error(char *msg);
+#endif
+
#if (__GLIBC__ < 2) && (defined BB_SYSLOGD || defined BB_INIT)
extern int vdprintf(int d, const char *format, va_list ap);
#endif
diff --git a/printf.c b/printf.c
index 02d0811..5be3a67 100644
--- a/printf.c
+++ b/printf.c
@@ -121,8 +121,6 @@
#define hextobin(c) ((c)>='a'&&(c)<='f' ? (c)-'a'+10 : (c)>='A'&&(c)<='F' ? (c)-'A'+10 : (c)-'0')
#define octtobin(c) ((c) - '0')
-char *xmalloc ();
-
static double xstrtod __P ((char *s));
static int print_esc __P ((char *escstart));
static int print_formatted __P ((char *format, int argc, char **argv));
diff --git a/tail.c b/tail.c
index 697177d..5198892 100644
--- a/tail.c
+++ b/tail.c
@@ -1,3 +1,402 @@
+#include "internal.h"
+/* This file contains _two_ implementations of tail. One is
+ * a bit more full featured, but costs 6k. The other (i.e. the
+ * SIMPLE_TAIL one) is less capable, but is good enough for about
+ * 99% of the things folks want to use tail for, and only costs 2k.
+ */
+
+
+#ifdef BB_FEATURE_SIMPLE_TAIL
+
+/* tail -- output the last part of file(s)
+ Copyright (C) 89, 90, 91, 95, 1996 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+ Original version by Paul Rubin <phr@ocf.berkeley.edu>.
+ Extensions by David MacKenzie <djm@gnu.ai.mit.edu>.
+ tail -f for multiple files by Ian Lance Taylor <ian@airs.com>.
+
+ Rewrote the option parser, removed locales support,
+ and generally busyboxed, Erik Andersen <andersen@lineo.com>
+
+ Removed superfluous options and associated code ("-c", "-n", "-q").
+ Removed "tail -f" suport for multiple files.
+ Both changes by Friedrich Vedder <fwv@myrtle.lahn.de>.
+
+ */
+
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <ctype.h>
+
+
+#define XWRITE(fd, buffer, n_bytes) \
+ do { \
+ if (n_bytes > 0 && fwrite ((buffer), 1, (n_bytes), stdout) == 0) \
+ error("write error"); \
+ } while (0)
+
+/* Number of items to tail. */
+#define DEFAULT_N_LINES 10
+
+/* Size of atomic reads. */
+#ifndef BUFSIZ
+#define BUFSIZ (512 * 8)
+#endif
+
+/* If nonzero, read from the end of one file until killed. */
+static int forever;
+
+/* If nonzero, print filename headers. */
+static int print_headers;
+
+const char tail_usage[] =
+ "tail [OPTION] [FILE]...\n\n"
+ "Print last 10 lines of each FILE to standard output.\n"
+ "With more than one FILE, precede each with a header giving the\n"
+ "file name. With no FILE, or when FILE is -, read standard input.\n\n"
+ "Options:\n"
+ "\t-n NUM\t\tPrint last NUM lines instead of first 10\n"
+ "\t-f\t\tOutput data as the file grows. This version\n"
+ "\t\t\tof 'tail -f' supports only one file at a time.\n";
+
+
+static void write_header(const char *filename)
+{
+ static int first_file = 1;
+
+ printf("%s==> %s <==\n", (first_file ? "" : "\n"), filename);
+ first_file = 0;
+}
+
+/* Print the last N_LINES lines from the end of file FD.
+ Go backward through the file, reading `BUFSIZ' bytes at a time (except
+ probably the first), until we hit the start of the file or have
+ read NUMBER newlines.
+ POS starts out as the length of the file (the offset of the last
+ byte of the file + 1).
+ Return 0 if successful, 1 if an error occurred. */
+
+static int
+file_lines(const char *filename, int fd, long int n_lines, off_t pos)
+{
+ char buffer[BUFSIZ];
+ int bytes_read;
+ int i; /* Index into `buffer' for scanning. */
+
+ if (n_lines == 0)
+ return 0;
+
+ /* Set `bytes_read' to the size of the last, probably partial, buffer;
+ 0 < `bytes_read' <= `BUFSIZ'. */
+ bytes_read = pos % BUFSIZ;
+ if (bytes_read == 0)
+ bytes_read = BUFSIZ;
+ /* Make `pos' a multiple of `BUFSIZ' (0 if the file is short), so that all
+ reads will be on block boundaries, which might increase efficiency. */
+ pos -= bytes_read;
+ lseek(fd, pos, SEEK_SET);
+ bytes_read = fullRead(fd, buffer, bytes_read);
+ if (bytes_read == -1)
+ error("read error");
+
+ /* Count the incomplete line on files that don't end with a newline. */
+ if (bytes_read && buffer[bytes_read - 1] != '\n')
+ --n_lines;
+
+ do {
+ /* Scan backward, counting the newlines in this bufferfull. */
+ for (i = bytes_read - 1; i >= 0; i--) {
+ /* Have we counted the requested number of newlines yet? */
+ if (buffer[i] == '\n' && n_lines-- == 0) {
+ /* If this newline wasn't the last character in the buffer,
+ print the text after it. */
+ if (i != bytes_read - 1)
+ XWRITE(STDOUT_FILENO, &buffer[i + 1],
+ bytes_read - (i + 1));
+ return 0;
+ }
+ }
+ /* Not enough newlines in that bufferfull. */
+ if (pos == 0) {
+ /* Not enough lines in the file; print the entire file. */
+ lseek(fd, (off_t) 0, SEEK_SET);
+ return 0;
+ }
+ pos -= BUFSIZ;
+ lseek(fd, pos, SEEK_SET);
+ }
+ while ((bytes_read = fullRead(fd, buffer, BUFSIZ)) > 0);
+ if (bytes_read == -1)
+ error("read error");
+
+ return 0;
+}
+
+/* Print the last N_LINES lines from the end of the standard input,
+ open for reading as pipe FD.
+ Buffer the text as a linked list of LBUFFERs, adding them as needed.
+ Return 0 if successful, 1 if an error occured. */
+
+static int pipe_lines(const char *filename, int fd, long int n_lines)
+{
+ struct linebuffer {
+ int nbytes, nlines;
+ char buffer[BUFSIZ];
+ struct linebuffer *next;
+ };
+ typedef struct linebuffer LBUFFER;
+ LBUFFER *first, *last, *tmp;
+ int i; /* Index into buffers. */
+ int total_lines = 0; /* Total number of newlines in all buffers. */
+ int errors = 0;
+
+ first = last = (LBUFFER *) xmalloc(sizeof(LBUFFER));
+ first->nbytes = first->nlines = 0;
+ first->next = NULL;
+ tmp = (LBUFFER *) xmalloc(sizeof(LBUFFER));
+
+ /* Input is always read into a fresh buffer. */
+ while ((tmp->nbytes = fullRead(fd, tmp->buffer, BUFSIZ)) > 0) {
+ tmp->nlines = 0;
+ tmp->next = NULL;
+
+ /* Count the number of newlines just read. */
+ for (i = 0; i < tmp->nbytes; i++)
+ if (tmp->buffer[i] == '\n')
+ ++tmp->nlines;
+ total_lines += tmp->nlines;
+
+ /* If there is enough room in the last buffer read, just append the new
+ one to it. This is because when reading from a pipe, `nbytes' can
+ often be very small. */
+ if (tmp->nbytes + last->nbytes < BUFSIZ) {
+ memcpy(&last->buffer[last->nbytes], tmp->buffer, tmp->nbytes);
+ last->nbytes += tmp->nbytes;
+ last->nlines += tmp->nlines;
+ } else {
+ /* If there's not enough room, link the new buffer onto the end of
+ the list, then either free up the oldest buffer for the next
+ read if that would leave enough lines, or else malloc a new one.
+ Some compaction mechanism is possible but probably not
+ worthwhile. */
+ last = last->next = tmp;
+ if (total_lines - first->nlines > n_lines) {
+ tmp = first;
+ total_lines -= first->nlines;
+ first = first->next;
+ } else
+ tmp = (LBUFFER *) xmalloc(sizeof(LBUFFER));
+ }
+ }
+ if (tmp->nbytes == -1)
+ error("read error");
+
+ free((char *) tmp);
+
+ /* This prevents a core dump when the pipe contains no newlines. */
+ if (n_lines == 0)
+ goto free_lbuffers;
+
+ /* Count the incomplete line on files that don't end with a newline. */
+ if (last->buffer[last->nbytes - 1] != '\n') {
+ ++last->nlines;
+ ++total_lines;
+ }
+
+ /* Run through the list, printing lines. First, skip over unneeded
+ buffers. */
+ for (tmp = first; total_lines - tmp->nlines > n_lines; tmp = tmp->next)
+ total_lines -= tmp->nlines;
+
+ /* Find the correct beginning, then print the rest of the file. */
+ if (total_lines > n_lines) {
+ char *cp;
+
+ /* Skip `total_lines' - `n_lines' newlines. We made sure that
+ `total_lines' - `n_lines' <= `tmp->nlines'. */
+ cp = tmp->buffer;
+ for (i = total_lines - n_lines; i; --i)
+ while (*cp++ != '\n')
+ /* Do nothing. */ ;
+ i = cp - tmp->buffer;
+ } else
+ i = 0;
+ XWRITE(STDOUT_FILENO, &tmp->buffer[i], tmp->nbytes - i);
+
+ for (tmp = tmp->next; tmp; tmp = tmp->next)
+ XWRITE(STDOUT_FILENO, tmp->buffer, tmp->nbytes);
+
+ free_lbuffers:
+ while (first) {
+ tmp = first->next;
+ free((char *) first);
+ first = tmp;
+ }
+ return errors;
+}
+
+/* Display file FILENAME from the current position in FD to the end.
+ If `forever' is nonzero, keep reading from the end of the file
+ until killed. Return the number of bytes read from the file. */
+
+static long dump_remainder(const char *filename, int fd)
+{
+ char buffer[BUFSIZ];
+ int bytes_read;
+ long total;
+
+ total = 0;
+ output:
+ while ((bytes_read = fullRead(fd, buffer, BUFSIZ)) > 0) {
+ XWRITE(STDOUT_FILENO, buffer, bytes_read);
+ total += bytes_read;
+ }
+ if (bytes_read == -1)
+ error("read error");
+ if (forever) {
+ fflush(stdout);
+ sleep(1);
+ goto output;
+ }
+
+ return total;
+}
+
+/* Output the last N_LINES lines of file FILENAME open for reading in FD.
+ Return 0 if successful, 1 if an error occurred. */
+
+static int tail_lines(const char *filename, int fd, long int n_lines)
+{
+ struct stat stats;
+ off_t length;
+
+ if (print_headers)
+ write_header(filename);
+
+ if (fstat(fd, &stats))
+ error("fstat error");
+
+ /* Use file_lines only if FD refers to a regular file with
+ its file pointer positioned at beginning of file. */
+ /* FIXME: adding the lseek conjunct is a kludge.
+ Once there's a reasonable test suite, fix the true culprit:
+ file_lines. file_lines shouldn't presume that the input
+ file pointer is initially positioned to beginning of file. */
+ if (S_ISREG(stats.st_mode)
+ && lseek(fd, (off_t) 0, SEEK_CUR) == (off_t) 0) {
+ length = lseek(fd, (off_t) 0, SEEK_END);
+ if (length != 0 && file_lines(filename, fd, n_lines, length))
+ return 1;
+ dump_remainder(filename, fd);
+ } else
+ return pipe_lines(filename, fd, n_lines);
+
+ return 0;
+}
+
+/* Display the last N_UNITS lines of file FILENAME.
+ "-" for FILENAME means the standard input.
+ Return 0 if successful, 1 if an error occurred. */
+
+static int tail_file(const char *filename, off_t n_units)
+{
+ int fd, errors;
+
+ if (!strcmp(filename, "-")) {
+ filename = "standard input";
+ errors = tail_lines(filename, 0, (long) n_units);
+ } else {
+ /* Not standard input. */
+ fd = open(filename, O_RDONLY);
+ if (fd == -1)
+ error("open error");
+
+ errors = tail_lines(filename, fd, (long) n_units);
+ close(fd);
+ }
+
+ return errors;
+}
+
+extern int tail_main(int argc, char **argv)
+{
+ int exit_status = 0;
+ int n_units = DEFAULT_N_LINES;
+ int n_tmp, i;
+ char opt;
+
+ forever = print_headers = 0;
+
+ /* parse argv[] */
+ for (i = 1; i < argc; i++) {
+ if (argv[i][0] == '-') {
+ opt = argv[i][1];
+ switch (opt) {
+ case 'f':
+ forever = 1;
+ break;
+ case 'n':
+ n_tmp = 0;
+ if (++i < argc)
+ n_tmp = atoi(argv[i]);
+ if (n_tmp < 1)
+ usage(tail_usage);
+ n_units = n_tmp;
+ break;
+ case '-':
+ case 'h':
+ usage(tail_usage);
+ default:
+ fprintf(stderr, "tail: invalid option -- %c\n", opt);
+ usage(tail_usage);
+ }
+ } else {
+ break;
+ }
+ }
+
+ if (i + 1 < argc) {
+ if (forever) {
+ fprintf(stderr,
+ "tail: option -f is invalid with multiple files\n");
+ usage(tail_usage);
+ }
+ print_headers = 1;
+ }
+
+ if (i >= argc) {
+ exit_status |= tail_file("-", n_units);
+ } else {
+ for (; i < argc; i++)
+ exit_status |= tail_file(argv[i], n_units);
+ }
+
+ exit(exit_status == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
+}
+
+
+#else
+// Here follows the code for the full featured tail code
+
+
/* tail -- output the last part of file(s)
Copyright (C) 89, 90, 91, 95, 1996 Free Software Foundation, Inc.
@@ -42,7 +441,7 @@
#define NDEBUG 1
-static void error(int i, int errnum, char* fmt, ...)
+static void detailed_error(int i, int errnum, char* fmt, ...)
{
va_list arguments;
@@ -60,7 +459,7 @@
assert ((fd) == 1); \
assert ((n_bytes) >= 0); \
if (n_bytes > 0 && fwrite ((buffer), 1, (n_bytes), stdout) == 0) \
- error (EXIT_FAILURE, errno, "write error"); \
+ detailed_error (EXIT_FAILURE, errno, "write error"); \
} \
while (0)
@@ -100,8 +499,6 @@
multiple_files, always, never
};
-char *xmalloc ();
-
/* The name this program was run with. */
char *program_name;
@@ -168,7 +565,7 @@
bytes_read = fullRead (fd, buffer, bytes_read);
if (bytes_read == -1)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
@@ -204,7 +601,7 @@
while ((bytes_read = fullRead (fd, buffer, BUFSIZ)) > 0);
if (bytes_read == -1)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
return 0;
@@ -276,7 +673,7 @@
}
if (tmp->nbytes == -1)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
errors = 1;
free ((char *) tmp);
goto free_lbuffers;
@@ -390,7 +787,7 @@
}
if (tmp->nbytes == -1)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
errors = 1;
free ((char *) tmp);
goto free_cbuffers;
@@ -438,7 +835,7 @@
n_bytes -= bytes_read;
if (bytes_read == -1)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
else if (n_bytes < 0)
@@ -466,7 +863,7 @@
}
if (bytes_read == -1)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
else if (bytes_to_skip < bytes_read)
@@ -496,7 +893,7 @@
total += bytes_read;
}
if (bytes_read == -1)
- error (EXIT_FAILURE, errno, "%s", filename);
+ detailed_error (EXIT_FAILURE, errno, "%s", filename);
if (forever)
{
fflush (stdout);
@@ -540,7 +937,7 @@
continue;
if (fstat (file_descs[i], &stats) < 0)
{
- error (0, errno, "%s", names[i]);
+ detailed_error (0, errno, "%s", names[i]);
file_descs[i] = -1;
continue;
}
@@ -590,7 +987,7 @@
error, either. */
if (fstat (fd, &stats))
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
@@ -619,7 +1016,7 @@
}
else
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
@@ -656,7 +1053,7 @@
if (fstat (fd, &stats))
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
return 1;
}
@@ -723,12 +1120,12 @@
{
if (fstat (0, &stats) < 0)
{
- error (0, errno, "standard input");
+ detailed_error (0, errno, "standard input");
errors = 1;
}
else if (!S_ISREG (stats.st_mode))
{
- error (0, 0,
+ detailed_error (0, 0,
"standard input: cannot follow end of non-regular file");
errors = 1;
}
@@ -749,7 +1146,7 @@
{
if (forever_multiple)
file_descs[filenum] = -1;
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
errors = 1;
}
else
@@ -761,12 +1158,12 @@
{
if (fstat (fd, &stats) < 0)
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
errors = 1;
}
else if (!S_ISREG (stats.st_mode))
{
- error (0, 0, "%s: cannot follow end of non-regular file",
+ detailed_error (0, 0, "%s: cannot follow end of non-regular file",
filename);
errors = 1;
}
@@ -785,7 +1182,7 @@
{
if (close (fd))
{
- error (0, errno, "%s", filename);
+ detailed_error (0, errno, "%s", filename);
errors = 1;
}
}
@@ -903,8 +1300,11 @@
}
if (have_read_stdin && close (0) < 0)
- error (EXIT_FAILURE, errno, "-");
+ detailed_error (EXIT_FAILURE, errno, "-");
if (fclose (stdout) == EOF)
- error (EXIT_FAILURE, errno, "write error");
+ detailed_error (EXIT_FAILURE, errno, "write error");
exit (exit_status == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}
+
+
+#endif
diff --git a/utility.c b/utility.c
index 4b67ce9..8139f38 100644
--- a/utility.c
+++ b/utility.c
@@ -175,7 +175,7 @@
}
} else if (S_ISFIFO(srcStatBuf.st_mode)) {
//fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
- if (mkfifo(destName, 644)) {
+ if (mkfifo(destName, 0644)) {
perror(destName);
return (FALSE);
}
@@ -406,7 +406,6 @@
else
status = lstat(fileName, &statbuf);
- status = lstat(fileName, &statbuf);
if (status < 0) {
perror(fileName);
return (FALSE);
@@ -1118,6 +1117,24 @@
}
#endif
+#if defined BB_GUNZIP || defined BB_GZIP || defined BB_PRINTF || defined BB_TAIL
+extern void *xmalloc (size_t size)
+{
+ void *cp = malloc (size);
+
+ if (cp == NULL) {
+ error("out of memory");
+ }
+ return cp;
+}
+
+extern void error(char *msg)
+{
+ fprintf(stderr, "\n%s\n", msg);
+ exit(1);
+}
+#endif
+
#if (__GLIBC__ < 2) && (defined BB_SYSLOGD || defined BB_INIT)
extern int vdprintf(int d, const char *format, va_list ap)
{