diff options
Diffstat (limited to 'bin/gensquashfs/options.c')
| -rw-r--r-- | bin/gensquashfs/options.c | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/bin/gensquashfs/options.c b/bin/gensquashfs/options.c index 14c37ab..fc2d900 100644 --- a/bin/gensquashfs/options.c +++ b/bin/gensquashfs/options.c @@ -35,12 +35,13 @@ static struct option long_opts[] = { #ifdef WITH_SELINUX { "selinux", required_argument, NULL, 's' }, #endif + { "sort-file", required_argument, NULL, 'S' }, { "version", no_argument, NULL, 'V' }, { "help", no_argument, NULL, 'h' }, { NULL, 0, NULL, 0 }, }; -static const char *short_opts = "F:D:X:c:b:B:d:u:g:j:Q:kxoefqThV" +static const char *short_opts = "F:D:X:c:b:B:d:u:g:j:Q:S:kxoefqThV" #ifdef WITH_SELINUX "s:" #endif @@ -98,6 +99,10 @@ static const char *help_string = " directory entries actually specify.\n" " --all-root A short hand for `--set-uid 0 --set-gid 0`.\n" "\n" +" --sort-file, -S <file> Specify a \"sort file\" that can be used to\n" +" micro manage the order of files during packing\n" +" and behaviour (compression, fragmentation, ..)\n" +"\n" #ifdef WITH_SELINUX " --selinux, -s <file> Specify an SELinux label file to get context\n" " attributes from.\n" @@ -169,6 +174,39 @@ const char *help_details = " glob /usr/lib 0777 0 0 -type l -name \"*.so.*\" ./lib\n" "\n\n"; +const char *sort_details = +"When using a sort file, the order in which regular files are packed can be\n" +"changed, as well as packing behaviour. Each line in the sort file consists\n" +"of a numeric priority (can be negative, lower priority is packed first),\n" +"followed by optional packing flags, followed by the file path.\n" +"\n" +"The fields are white-space separated. The flags are comma seperated and\n" +"contained within two square bracktes. Single line comments with `#` and\n" +"empty lines are allowed.\n" +"\n" +"The default priority for un-listed files is 0. The filename specifies the\n" +"path within the SquashFS image and is normalized. If e.g. spaces at the\n" +"beginning or end are needed, it can be enclosed in double quotes `\"`\n" +"and back-slash can be used for escaping.\n" +"\n" +"The sorting algorithm is stable, so files with the same priority do not\n" +"change place relative to each other in their initial ordering.\n" +"\n" +"Example:\n" +" # Specify a packing order with file globbing\n" +" -8000 [glob] bin/*\n" +" -5000 [glob] lib/*\n" +"\n" +" # glob_no_path means * is allowed to match /\n" +" -1000 [glob_no_path] share/*\n" +"\n" +" # Our boot loader needs this\n" +" -100000 [dont_compress,dont_fragment,nosparse] boot/vmlinuz\n" +"\n" +" # For demonstration, a quoted filename and no flags\n" +" 1337 \"usr/share/my \\\"special\\\" file \"\n" +"\n\n"; + void process_command_line(options_t *opt, int argc, char **argv) { bool have_compressor; @@ -285,10 +323,14 @@ void process_command_line(options_t *opt, int argc, char **argv) opt->selinux = optarg; break; #endif + case 'S': + opt->sortfile = optarg; + break; case 'h': printf(help_string, SQFS_DEFAULT_BLOCK_SIZE, SQFS_DEVBLK_SIZE); fputs(help_details, stdout); + fputs(sort_details, stdout); compressor_print_available(); exit(EXIT_SUCCESS); case 'V': |