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-rw-r--r--doc/gensquashfs.15
-rw-r--r--include/compress.h6
-rw-r--r--lib/comp/compressor.c45
-rw-r--r--mkfs/mkfs.h2
-rw-r--r--mkfs/options.c36
5 files changed, 62 insertions, 32 deletions
diff --git a/doc/gensquashfs.1 b/doc/gensquashfs.1
index 4b739fd..8050dc6 100644
--- a/doc/gensquashfs.1
+++ b/doc/gensquashfs.1
@@ -21,8 +21,9 @@ directory into a SquashFS image. The directory becomes the root of the file
system.
.TP
\fB\-\-compressor\fR, \fB\-c\fR <name>
-Select the compressor to use (defaults to 'xz').
-Run \fBgensquashfs \-\-help\fR to get a list of all available compressors.
+Select the compressor to use.
+Run \fBgensquashfs \-\-help\fR to get a list of all available compressors
+and the default selection.
.TP
\fB\-\-comp\-extra\fR, \fB\-X\fR <options>
A comma seperated list of extra options for the selected compressor. Specify
diff --git a/include/compress.h b/include/compress.h
index c9a4e08..7937646 100644
--- a/include/compress.h
+++ b/include/compress.h
@@ -49,6 +49,12 @@ compressor_t *compressor_create(E_SQFS_COMPRESSOR id, bool compress,
void compressor_print_help(E_SQFS_COMPRESSOR id);
+void compressor_print_available(void);
+
E_SQFS_COMPRESSOR compressor_get_default(void);
+const char *compressor_name_from_id(E_SQFS_COMPRESSOR id);
+
+int compressor_id_from_name(const char *name, E_SQFS_COMPRESSOR *out);
+
#endif /* COMPRESS_H */
diff --git a/lib/comp/compressor.c b/lib/comp/compressor.c
index 6dff416..506df46 100644
--- a/lib/comp/compressor.c
+++ b/lib/comp/compressor.c
@@ -47,6 +47,15 @@ static const compressor_help_fun_t helpfuns[SQFS_COMP_MAX + 1] = {
#endif
};
+static const char *names[] = {
+ [SQFS_COMP_GZIP] = "gzip",
+ [SQFS_COMP_LZMA] = "lzma",
+ [SQFS_COMP_LZO] = "lzo",
+ [SQFS_COMP_XZ] = "xz",
+ [SQFS_COMP_LZ4] = "lz4",
+ [SQFS_COMP_ZSTD] = "zstd",
+};
+
int generic_write_options(int fd, const void *data, size_t size)
{
uint8_t buffer[size + 2];
@@ -129,6 +138,42 @@ void compressor_print_help(E_SQFS_COMPRESSOR id)
helpfuns[id]();
}
+void compressor_print_available(void)
+{
+ size_t i;
+
+ fputs("Available compressors:\n", stdout);
+
+ for (i = 0; i < sizeof(names) / sizeof(names[0]); ++i) {
+ if (compressor_exists(i))
+ printf("\t%s\n", names[i]);
+ }
+
+ printf("\nDefault compressor: %s\n", names[compressor_get_default()]);
+}
+
+const char *compressor_name_from_id(E_SQFS_COMPRESSOR id)
+{
+ if (id < 0 || (size_t)id > sizeof(names) / sizeof(names[0]))
+ return NULL;
+
+ return names[id];
+}
+
+int compressor_id_from_name(const char *name, E_SQFS_COMPRESSOR *out)
+{
+ size_t i;
+
+ for (i = 0; i < sizeof(names) / sizeof(names[0]); ++i) {
+ if (names[i] != NULL && strcmp(names[i], name) == 0) {
+ *out = i;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
E_SQFS_COMPRESSOR compressor_get_default(void)
{
#if defined(WITH_XZ)
diff --git a/mkfs/mkfs.h b/mkfs/mkfs.h
index cea9ebc..4a39eb5 100644
--- a/mkfs/mkfs.h
+++ b/mkfs/mkfs.h
@@ -28,8 +28,8 @@ typedef struct {
unsigned int def_gid;
unsigned int def_mode;
unsigned int def_mtime;
+ E_SQFS_COMPRESSOR compressor;
int outmode;
- int compressor;
int blksz;
int devblksz;
bool quiet;
diff --git a/mkfs/options.c b/mkfs/options.c
index a746ba4..e298a6c 100644
--- a/mkfs/options.c
+++ b/mkfs/options.c
@@ -61,7 +61,6 @@ static const char *help_string =
"\n"
" --compressor, -c <name> Select the compressor to use.\n"
" A list of available compressors is below.\n"
-" Defaults to '%s'.\n"
" --comp-extra, -X <options> A comma seperated list of extra options for\n"
" the selected compressor. Specify 'help' to\n"
" get a list of available options.\n"
@@ -126,15 +125,6 @@ static const char *help_string =
" file /bin/bash 0755 0 0"
"\n\n";
-static const char *compressors[] = {
- [SQFS_COMP_GZIP] = "gzip",
- [SQFS_COMP_LZMA] = "lzma",
- [SQFS_COMP_LZO] = "lzo",
- [SQFS_COMP_XZ] = "xz",
- [SQFS_COMP_LZ4] = "lz4",
- [SQFS_COMP_ZSTD] = "zstd",
-};
-
static long read_number(const char *name, const char *str, long min, long max)
{
long result = strtol(str, NULL, 0);
@@ -217,17 +207,13 @@ void process_command_line(options_t *opt, int argc, char **argv)
switch (i) {
case 'c':
- have_compressor = false;
+ have_compressor = true;
- for (i = SQFS_COMP_MIN; i <= SQFS_COMP_MAX; ++i) {
- if (strcmp(compressors[i], optarg) == 0) {
- if (compressor_exists(i)) {
- have_compressor = true;
- opt->compressor = i;
- break;
- }
- }
- }
+ if (compressor_id_from_name(optarg, &opt->compressor))
+ have_compressor = false;
+
+ if (!compressor_exists(opt->compressor))
+ have_compressor = false;
if (!have_compressor) {
fprintf(stderr, "Unsupported compressor '%s'\n",
@@ -268,16 +254,8 @@ void process_command_line(options_t *opt, int argc, char **argv)
#endif
case 'h':
printf(help_string, __progname,
- compressors[compressor_get_default()],
SQFS_DEFAULT_BLOCK_SIZE, SQFS_DEVBLK_SIZE);
-
- fputs("Available compressors:\n", stdout);
-
- for (i = SQFS_COMP_MIN; i <= SQFS_COMP_MAX; ++i) {
- if (compressor_exists(i))
- printf("\t%s\n", compressors[i]);
- }
-
+ compressor_print_available();
exit(EXIT_SUCCESS);
case 'V':
print_version();