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Diffstat (limited to 'unpack')
-rw-r--r--unpack/fill_files.c95
-rw-r--r--unpack/options.c21
-rw-r--r--unpack/rdsquashfs.c2
-rw-r--r--unpack/rdsquashfs.h7
4 files changed, 119 insertions, 6 deletions
diff --git a/unpack/fill_files.c b/unpack/fill_files.c
index 6584699..865d050 100644
--- a/unpack/fill_files.c
+++ b/unpack/fill_files.c
@@ -33,7 +33,98 @@ static int fill_files(data_reader_t *data, file_info_t *list, int flags)
return 0;
}
-int fill_unpacked_files(fstree_t *fs, data_reader_t *data, int flags)
+static file_info_t *split_list(file_info_t *list, uint64_t threashold)
{
- return fill_files(data, fs->files, flags);
+ file_info_t *it, *new = NULL;
+ uint64_t size = 0;
+
+ for (it = list; it != NULL; it = it->next) {
+ if (it->input_file == NULL)
+ continue;
+
+ size += it->size - it->sparse;
+
+ if (size >= threashold) {
+ new = it->next;
+ it->next = NULL;
+ break;
+ }
+ }
+
+ return new;
+}
+
+static uint64_t total_size(file_info_t *list)
+{
+ uint64_t size = 0;
+ file_info_t *it;
+
+ for (it = list; it != NULL; it = it->next) {
+ if (it->input_file != NULL)
+ size += it->size - it->sparse;
+ }
+
+ return size;
+}
+
+int fill_unpacked_files(fstree_t *fs, data_reader_t *data, int flags,
+ unsigned int num_jobs)
+{
+ file_info_t *sublists[num_jobs], *it;
+ int exitstatus, status = 0;
+ uint64_t threshold;
+ unsigned int i;
+ pid_t pid;
+
+ if (num_jobs <= 1) {
+ status = fill_files(data, fs->files, flags);
+
+ for (it = fs->files; it != NULL; it = it->next)
+ free(it->input_file);
+
+ return status;
+ }
+
+ threshold = total_size(fs->files) / num_jobs;
+
+ for (i = 0; i < num_jobs; ++i) {
+ sublists[i] = fs->files;
+
+ fs->files = split_list(fs->files, threshold);
+ }
+
+ for (i = 0; i < num_jobs; ++i) {
+ pid = fork();
+
+ if (pid == 0) {
+ if (fill_files(data, sublists[i], flags))
+ exit(EXIT_FAILURE);
+ exit(EXIT_SUCCESS);
+ }
+
+ if (pid < 0) {
+ perror("fork");
+ status = -1;
+ num_jobs = i;
+ break;
+ }
+ }
+
+ for (i = 0; i < num_jobs; ++i) {
+ do {
+ pid = waitpid(-1, &exitstatus, 0);
+ if (errno == ECHILD)
+ goto out;
+ } while (pid < 0);
+
+ if (!WIFEXITED(exitstatus) ||
+ WEXITSTATUS(exitstatus) != EXIT_SUCCESS) {
+ status = -1;
+ }
+
+ for (it = sublists[i]; it != NULL; it = it->next)
+ free(it->input_file);
+ }
+out:
+ return status;
}
diff --git a/unpack/options.c b/unpack/options.c
index c42f16a..e7911e5 100644
--- a/unpack/options.c
+++ b/unpack/options.c
@@ -12,6 +12,7 @@ static struct option long_opts[] = {
{ "no-slink", no_argument, NULL, 'L' },
{ "no-empty-dir", no_argument, NULL, 'E' },
{ "no-sparse", no_argument, NULL, 'Z' },
+ { "jobs", required_argument, NULL, 'j' },
{ "describe", no_argument, NULL, 'd' },
{ "chmod", no_argument, NULL, 'C' },
{ "chown", no_argument, NULL, 'O' },
@@ -20,7 +21,7 @@ static struct option long_opts[] = {
{ "version", no_argument, NULL, 'V' },
};
-static const char *short_opts = "l:c:u:p:DSFLCOEZdqhV";
+static const char *short_opts = "l:c:u:p:DSFLCOEZj:dqhV";
static const char *help_string =
"Usage: %s [OPTIONS] <squashfs-file>\n"
@@ -50,6 +51,7 @@ static const char *help_string =
" empty after applying the above rules.\n"
" --no-sparse, -Z Do not create sparse files, always write zero\n"
" blocks to disk.\n"
+" --jobs, -j <count> Number of parallel unpacking jobs to start.\n"
" --chmod, -C Change permission flags of unpacked files to\n"
" those store in the squashfs image.\n"
" --chown, -O Change ownership of unpacked files to the\n"
@@ -85,7 +87,7 @@ static char *get_path(char *old, const char *arg)
void process_command_line(options_t *opt, int argc, char **argv)
{
- int i;
+ int i, j;
opt->op = OP_NONE;
opt->rdtree_flags = 0;
@@ -93,6 +95,7 @@ void process_command_line(options_t *opt, int argc, char **argv)
opt->cmdpath = NULL;
opt->unpack_root = NULL;
opt->image_name = NULL;
+ opt->num_jobs = 1;
for (;;) {
i = getopt_long(argc, argv, short_opts, long_opts, NULL);
@@ -124,6 +127,17 @@ void process_command_line(options_t *opt, int argc, char **argv)
case 'Z':
opt->flags |= UNPACK_NO_SPARSE;
break;
+ case 'j':
+ for (j = 0; optarg[j] != '\0'; ++j) {
+ if (j > 6 || !isdigit(optarg[j]))
+ goto fail_num_jobs;
+ }
+
+ opt->num_jobs = atoi(optarg);
+
+ if (opt->num_jobs < 1)
+ goto fail_num_jobs;
+ break;
case 'c':
opt->op = OP_CAT;
opt->cmdpath = get_path(opt->cmdpath, optarg);
@@ -176,4 +190,7 @@ fail_arg:
fprintf(stderr, "Try `%s --help' for more information.\n", __progname);
free(opt->cmdpath);
exit(EXIT_FAILURE);
+fail_num_jobs:
+ fputs("Expected a positive integer for --jobs.\n", stderr);
+ goto fail_arg;
}
diff --git a/unpack/rdsquashfs.c b/unpack/rdsquashfs.c
index a3618e3..f165b90 100644
--- a/unpack/rdsquashfs.c
+++ b/unpack/rdsquashfs.c
@@ -89,7 +89,7 @@ int main(int argc, char **argv)
if (data == NULL)
goto out_fs;
- if (fill_unpacked_files(&fs, data, opt.flags))
+ if (fill_unpacked_files(&fs, data, opt.flags, opt.num_jobs))
goto out_fs;
if (update_tree_attribs(n, opt.flags))
diff --git a/unpack/rdsquashfs.h b/unpack/rdsquashfs.h
index 45c91db..34404b0 100644
--- a/unpack/rdsquashfs.h
+++ b/unpack/rdsquashfs.h
@@ -14,10 +14,13 @@
#include "util.h"
#include <sys/sysmacros.h>
+#include <sys/types.h>
+#include <sys/wait.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
+#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
@@ -41,6 +44,7 @@ typedef struct {
int op;
int rdtree_flags;
int flags;
+ unsigned int num_jobs;
char *cmdpath;
const char *unpack_root;
const char *image_name;
@@ -52,7 +56,8 @@ int restore_fstree(tree_node_t *root, int flags);
int update_tree_attribs(tree_node_t *root, int flags);
-int fill_unpacked_files(fstree_t *fs, data_reader_t *data, int flags);
+int fill_unpacked_files(fstree_t *fs, data_reader_t *data, int flags,
+ unsigned int num_jobs);
void describe_tree(tree_node_t *root, const char *unpack_root);
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-31 17:49:03 +0000