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Refactor the siginfo/sigusr1 handling. The read/write reporting

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is sufficiently different that it was simpler to just put separate
reporting functions into read.c and write.c rather than try to have
a single all-purpose reporting function.
Switch to a custom function for converting int64_t to a string; in
the portable version, this saves a lot of configuration headaches
trying to decipher the platform printf().
This commit is contained in:
Tim Kientzle 2010-02-06 20:27:36 +00:00
parent a48279bb03
commit 12d4db7c3f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=203568
7 changed files with 145 additions and 201 deletions
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1
usr.bin/tar/Makefile
View File

@ -9,7 +9,6 @@ SRCS= bsdtar.c \
getdate.c \
matching.c \
read.c \
siginfo.c \
subst.c \
tree.c \
util.c \

52
usr.bin/tar/bsdtar.c
View File

@ -47,6 +47,9 @@ __FBSDID("$FreeBSD$");
#ifdef HAVE_PATHS_H
#include <paths.h>
#endif
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
@ -82,7 +85,32 @@ __FBSDID("$FreeBSD$");
#define _PATH_DEFTAPE "/dev/tape"
#endif
/* External function to parse a date/time string (from getdate.y) */
#if defined(HAVE_SIGACTION) && (defined(SIGINFO) || defined(SIGUSR1))
static volatile int siginfo_occurred;
static void
siginfo_handler(int sig)
{
(void)sig; /* UNUSED */
siginfo_occurred = 1;
}
int
need_report(void)
{
int r = siginfo_occurred;
siginfo_occurred = 0;
return (r);
}
#else
int
need_report(void)
{
return (0);
}
#endif
/* External function to parse a date/time string */
time_t get_date(time_t, const char *);
static void long_help(void);
@ -114,11 +142,23 @@ main(int argc, char **argv)
memset(bsdtar, 0, sizeof(*bsdtar));
bsdtar->fd = -1; /* Mark as "unused" */
option_o = 0;
#if defined(_WIN32) && !defined(__CYGWIN__)
/* Make sure open() function will be used with a binary mode. */
/* on cygwin, we need something similar, but instead link against */
/* a special startup object, binmode.o */
_set_fmode(_O_BINARY);
#if defined(HAVE_SIGACTION) && (defined(SIGINFO) || defined(SIGUSR1))
{ /* Catch SIGINFO and SIGUSR1, if they exist. */
struct sigaction sa;
sa.sa_handler = siginfo_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
#ifdef SIGINFO
if (sigaction(SIGINFO, &sa, NULL))
bsdtar_errc(1, errno, "sigaction(SIGINFO) failed");
#endif
#ifdef SIGUSR1
/* ... and treat SIGUSR1 the same way as SIGINFO. */
if (sigaction(SIGUSR1, &sa, NULL))
bsdtar_errc(1, errno, "sigaction(SIGUSR1) failed");
#endif
}
#endif
/* Need bsdtar_progname before calling bsdtar_warnc. */

7
usr.bin/tar/bsdtar.h
View File

@ -142,16 +142,13 @@ int exclude_from_file(struct bsdtar *, const char *pathname);
int excluded(struct bsdtar *, const char *pathname);
int include(struct bsdtar *, const char *pattern);
int include_from_file(struct bsdtar *, const char *pathname);
int need_report(void);
int pathcmp(const char *a, const char *b);
int process_lines(struct bsdtar *bsdtar, const char *pathname,
int (*process)(struct bsdtar *, const char *));
void safe_fprintf(FILE *, const char *fmt, ...);
void set_chdir(struct bsdtar *, const char *newdir);
void siginfo_init(struct bsdtar *);
void siginfo_setinfo(struct bsdtar *, const char * oper,
const char * path, int64_t size);
void siginfo_printinfo(struct bsdtar *, off_t progress);
void siginfo_done(struct bsdtar *);
const char *tar_i64toa(int64_t);
void tar_mode_c(struct bsdtar *bsdtar);
void tar_mode_r(struct bsdtar *bsdtar);
void tar_mode_t(struct bsdtar *bsdtar);

51
usr.bin/tar/read.c
View File

@ -70,6 +70,12 @@ __FBSDID("$FreeBSD$");
#include "bsdtar.h"
#include "err.h"
struct progress_data {
struct bsdtar *bsdtar;
struct archive *archive;
struct archive_entry *entry;
};
static void list_item_verbose(struct bsdtar *, FILE *,
struct archive_entry *);
static void read_archive(struct bsdtar *bsdtar, char mode);
@ -84,22 +90,40 @@ tar_mode_t(struct bsdtar *bsdtar)
void
tar_mode_x(struct bsdtar *bsdtar)
{
/* We want to catch SIGINFO and SIGUSR1. */
siginfo_init(bsdtar);
read_archive(bsdtar, 'x');
unmatched_inclusions_warn(bsdtar, "Not found in archive");
/* Restore old SIGINFO + SIGUSR1 handlers. */
siginfo_done(bsdtar);
}
static void
progress_func(void * cookie)
progress_func(void *cookie)
{
struct bsdtar * bsdtar = cookie;
struct progress_data *progress_data = cookie;
struct bsdtar *bsdtar = progress_data->bsdtar;
struct archive *a = progress_data->archive;
struct archive_entry *entry = progress_data->entry;
uint64_t comp, uncomp;
siginfo_printinfo(bsdtar, 0);
if (!need_report())
return;
if (bsdtar->verbose)
fprintf(stderr, "\n");
if (a != NULL) {
comp = archive_position_compressed(a);
uncomp = archive_position_uncompressed(a);
fprintf(stderr,
"In: %s bytes, compression %d%%;",
tar_i64toa(comp), (int)((uncomp - comp) * 100 / uncomp));
fprintf(stderr, " Out: %d files, %s bytes\n",
archive_file_count(a), tar_i64toa(uncomp));
}
if (entry != NULL) {
safe_fprintf(stderr, "Current: %s",
archive_entry_pathname(entry));
fprintf(stderr, " (%s bytes)\n",
tar_i64toa(archive_entry_size(entry)));
}
}
/*
@ -108,6 +132,7 @@ progress_func(void * cookie)
static void
read_archive(struct bsdtar *bsdtar, char mode)
{
struct progress_data progress_data;
FILE *out;
struct archive *a;
struct archive_entry *entry;
@ -140,8 +165,10 @@ read_archive(struct bsdtar *bsdtar, char mode)
if (mode == 'x') {
/* Set an extract callback so that we can handle SIGINFO. */
progress_data.bsdtar = bsdtar;
progress_data.archive = a;
archive_read_extract_set_progress_callback(a, progress_func,
bsdtar);
&progress_data);
}
if (mode == 'x' && bsdtar->option_chroot) {
@ -161,6 +188,7 @@ read_archive(struct bsdtar *bsdtar, char mode)
break;
r = archive_read_next_header(a, &entry);
progress_data.entry = entry;
if (r == ARCHIVE_EOF)
break;
if (r < ARCHIVE_OK)
@ -268,10 +296,7 @@ read_archive(struct bsdtar *bsdtar, char mode)
fflush(stderr);
}
/* Tell the SIGINFO-handler code what we're doing. */
siginfo_setinfo(bsdtar, "extracting",
archive_entry_pathname(entry), 0);
siginfo_printinfo(bsdtar, 0);
// TODO siginfo_printinfo(bsdtar, 0);
if (bsdtar->option_stdout)
r = archive_read_data_into_fd(a, 1);

152
usr.bin/tar/siginfo.c
View File

@ -1,152 +0,0 @@
/*-
* Copyright 2008 Colin Percival
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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 "bsdtar_platform.h"
__FBSDID("$FreeBSD$");
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bsdtar.h"
#include "err.h"
/* Is there a pending SIGINFO or SIGUSR1? */
static volatile sig_atomic_t siginfo_received = 0;
struct siginfo_data {
/* What sort of operation are we doing? */
char * oper;
/* What path are we handling? */
char * path;
/* How large is the archive entry? */
int64_t size;
/* Old signal handlers. */
#ifdef SIGINFO
void (*siginfo_old)(int);
#endif
void (*sigusr1_old)(int);
};
static void siginfo_handler(int sig);
/* Handler for SIGINFO / SIGUSR1. */
static void
siginfo_handler(int sig)
{
(void)sig; /* UNUSED */
/* Record that SIGINFO or SIGUSR1 has been received. */
siginfo_received = 1;
}
void
siginfo_init(struct bsdtar *bsdtar)
{
/* Allocate space for internal structure. */
if ((bsdtar->siginfo = malloc(sizeof(struct siginfo_data))) == NULL)
bsdtar_errc(1, errno, "malloc failed");
/* Set the strings to NULL so that free() is safe. */
bsdtar->siginfo->path = bsdtar->siginfo->oper = NULL;
#ifdef SIGINFO
/* We want to catch SIGINFO, if it exists. */
bsdtar->siginfo->siginfo_old = signal(SIGINFO, siginfo_handler);
#endif
#ifdef SIGUSR1
/* ... and treat SIGUSR1 the same way as SIGINFO. */
bsdtar->siginfo->sigusr1_old = signal(SIGUSR1, siginfo_handler);
#endif
}
void
siginfo_setinfo(struct bsdtar *bsdtar, const char * oper, const char * path,
int64_t size)
{
/* Free old operation and path strings. */
free(bsdtar->siginfo->oper);
free(bsdtar->siginfo->path);
/* Duplicate strings and store entry size. */
if ((bsdtar->siginfo->oper = strdup(oper)) == NULL)
bsdtar_errc(1, errno, "Cannot strdup");
if ((bsdtar->siginfo->path = strdup(path)) == NULL)
bsdtar_errc(1, errno, "Cannot strdup");
bsdtar->siginfo->size = size;
}
void
siginfo_printinfo(struct bsdtar *bsdtar, off_t progress)
{
/* If there's a signal to handle and we know what we're doing... */
if ((siginfo_received == 1) &&
(bsdtar->siginfo->path != NULL) &&
(bsdtar->siginfo->oper != NULL)) {
if (bsdtar->verbose)
fprintf(stderr, "\n");
if (bsdtar->siginfo->size > 0) {
safe_fprintf(stderr, "%s %s (%ju / %" PRId64 ")",
bsdtar->siginfo->oper, bsdtar->siginfo->path,
(uintmax_t)progress, bsdtar->siginfo->size);
} else {
safe_fprintf(stderr, "%s %s",
bsdtar->siginfo->oper, bsdtar->siginfo->path);
}
if (!bsdtar->verbose)
fprintf(stderr, "\n");
siginfo_received = 0;
}
}
void
siginfo_done(struct bsdtar *bsdtar)
{
#ifdef SIGINFO
/* Restore old SIGINFO handler. */
signal(SIGINFO, bsdtar->siginfo->siginfo_old);
#endif
#ifdef SIGUSR1
/* And the old SIGUSR1 handler, too. */
signal(SIGUSR1, bsdtar->siginfo->sigusr1_old);
#endif
/* Free strings. */
free(bsdtar->siginfo->path);
free(bsdtar->siginfo->oper);
/* Free internal data structure. */
free(bsdtar->siginfo);
}

22
usr.bin/tar/util.c
View File

@ -558,6 +558,28 @@ edit_pathname(struct bsdtar *bsdtar, struct archive_entry *entry)
return (0);
}
/*
* It would be nice to just use printf() for formatting large numbers,
* but the compatibility problems are quite a headache. Hence the
* following simple utility function.
*/
const char *
tar_i64toa(int64_t n0)
{
static char buff[24];
int64_t n = n0 < 0 ? -n0 : n0;
char *p = buff + sizeof(buff);
*--p = '\0';
do {
*--p = '0' + (int)(n % 10);
n /= 10;
} while (n > 0);
if (n0 < 0)
*--p = '-';
return p;
}
/*
* Like strcmp(), but try to be a little more aware of the fact that
* we're comparing two paths. Right now, it just handles leading

61
usr.bin/tar/write.c
View File

@ -127,10 +127,12 @@ static void archive_names_from_file(struct bsdtar *bsdtar,
struct archive *a);
static int archive_names_from_file_helper(struct bsdtar *bsdtar,
const char *line);
static int copy_file_data(struct bsdtar *bsdtar,
struct archive *a, struct archive *ina);
static int copy_file_data(struct bsdtar *, struct archive *a,
struct archive *ina, struct archive_entry *);
static int new_enough(struct bsdtar *, const char *path,
const struct stat *);
static void report_write(struct bsdtar *, struct archive *,
struct archive_entry *, int64_t progress);
static void test_for_append(struct bsdtar *);
static void write_archive(struct archive *, struct bsdtar *);
static void write_entry_backend(struct bsdtar *, struct archive *,
@ -414,9 +416,6 @@ write_archive(struct archive *a, struct bsdtar *bsdtar)
const char *arg;
struct archive_entry *entry, *sparse_entry;
/* We want to catch SIGINFO and SIGUSR1. */
siginfo_init(bsdtar);
/* Allocate a buffer for file data. */
if ((bsdtar->buff = malloc(FILEDATABUFLEN)) == NULL)
bsdtar_errc(1, 0, "cannot allocate memory");
@ -488,14 +487,11 @@ cleanup:
bsdtar->diskreader = NULL;
if (bsdtar->option_totals) {
fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
(BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
fprintf(stderr, "Total bytes written: %s\n",
tar_i64toa(archive_position_compressed(a)));
}
archive_write_finish(a);
/* Restore old SIGINFO + SIGUSR1 handlers. */
siginfo_done(bsdtar);
}
/*
@ -591,10 +587,8 @@ append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
if (bsdtar->verbose)
safe_fprintf(stderr, "a %s",
archive_entry_pathname(in_entry));
siginfo_setinfo(bsdtar, "copying",
archive_entry_pathname(in_entry),
archive_entry_size(in_entry));
siginfo_printinfo(bsdtar, 0);
if (need_report())
report_write(bsdtar, a, in_entry, 0);
e = archive_write_header(a, in_entry);
if (e != ARCHIVE_OK) {
@ -611,7 +605,7 @@ append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
if (e >= ARCHIVE_WARN) {
if (archive_entry_size(in_entry) == 0)
archive_read_data_skip(ina);
else if (copy_file_data(bsdtar, a, ina))
else if (copy_file_data(bsdtar, a, ina, in_entry))
exit(1);
}
@ -625,7 +619,8 @@ append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
/* Helper function to copy data between archives. */
static int
copy_file_data(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
copy_file_data(struct bsdtar *bsdtar, struct archive *a,
struct archive *ina, struct archive_entry *entry)
{
ssize_t bytes_read;
ssize_t bytes_written;
@ -633,7 +628,8 @@ copy_file_data(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
bytes_read = archive_read_data(ina, bsdtar->buff, FILEDATABUFLEN);
while (bytes_read > 0) {
siginfo_printinfo(bsdtar, progress);
if (need_report())
report_write(bsdtar, a, entry, progress);
bytes_written = archive_write_data(a, bsdtar->buff,
bytes_read);
@ -839,14 +835,8 @@ write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path)
if (!S_ISREG(st->st_mode))
archive_entry_set_size(entry, 0);
/* Record what we're doing, for SIGINFO / SIGUSR1. */
siginfo_setinfo(bsdtar, "adding",
archive_entry_pathname(entry), archive_entry_size(entry));
archive_entry_linkify(bsdtar->resolver, &entry, &spare_entry);
/* Handle SIGINFO / SIGUSR1 request if one was made. */
siginfo_printinfo(bsdtar, 0);
while (entry != NULL) {
write_entry_backend(bsdtar, a, entry);
archive_entry_free(entry);
@ -916,6 +906,28 @@ write_entry_backend(struct bsdtar *bsdtar, struct archive *a,
close(fd);
}
static void
report_write(struct bsdtar *bsdtar, struct archive *a,
struct archive_entry *entry, int64_t progress)
{
uint64_t comp, uncomp;
if (bsdtar->verbose)
fprintf(stderr, "\n");
comp = archive_position_compressed(a);
uncomp = archive_position_uncompressed(a);
fprintf(stderr, "In: %d files, %s bytes;",
archive_file_count(a), tar_i64toa(uncomp));
fprintf(stderr,
" Out: %s bytes, compression %d%%\n",
tar_i64toa(comp), (int)((uncomp - comp) * 100 / uncomp));
/* Can't have two calls to tar_i64toa() pending, so split the output. */
safe_fprintf(stderr, "Current: %s (%s",
archive_entry_pathname(entry),
tar_i64toa(progress));
fprintf(stderr, "/%s bytes)\n",
tar_i64toa(archive_entry_size(entry)));
}
/* Helper function to copy file to archive. */
static int
@ -928,7 +940,8 @@ write_file_data(struct bsdtar *bsdtar, struct archive *a,
bytes_read = read(fd, bsdtar->buff, FILEDATABUFLEN);
while (bytes_read > 0) {
siginfo_printinfo(bsdtar, progress);
if (need_report())
report_write(bsdtar, a, entry, progress);
bytes_written = archive_write_data(a, bsdtar->buff,
bytes_read);