mirror of
https://github.com/alsa-project/alsa-utils
synced 2024-12-31 21:09:46 +01:00
alsactl: Improved command line argument handling...
Improve command line argument handling for future extensions. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela
parent
cc5c3357cf
commit
067f4f3256
3 changed files with 141 additions and 65 deletions
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@ -46,66 +46,102 @@ int use_syslog = 0;
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char *command;
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char *statefile = NULL;
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#define TITLE 0x0100
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#define HEADER 0x0200
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#define FILEARG 0x0400
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#define ENVARG 0x0800
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#define INTARG 0x1000
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#define EMPCMD 0x2000
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#define CARDCMD 0x4000
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#define KILLCMD 0x8000
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struct arg {
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int sarg;
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char *larg;
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char *comment;
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};
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static struct arg args[] = {
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{ TITLE, NULL, "Usage: alsactl <options> command" },
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{ HEADER, NULL, "global options:" },
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{ 'h', "help", "this help" },
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{ 'd', "debug", "debug mode" },
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{ 'v', "version", "print version of this program" },
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{ HEADER, NULL, "Available state options:" },
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{ FILEARG | 'f', "file", "configuration file (default " SYS_ASOUNDRC ")" },
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{ 'l', "lock", "use file locking to serialize concurrent access" },
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{ 'F', "force", "try to restore the matching controls as much as possible" },
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{ 0, NULL, " (default mode)" },
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{ 'g', "ignore", "ignore 'No soundcards found' error" },
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{ 'P', "pedantic", "do not restore mismatching controls (old default)" },
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{ 'I', "no-init-fallback", "" },
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{ 0, NULL, "don't initialize even if restore fails" },
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{ FILEARG | 'r', "runstate", "save restore and init state to this file (only errors)" },
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{ 0, NULL, " default settings is 'no file set'" },
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{ 'R', "remove", "remove runstate file at first, otherwise append errors" },
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{ INTARG | 'p', "period", "store period in seconds for the daemon command" },
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{ FILEARG | 'e', "pid-file", "pathname for the process id (daemon mode)" },
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{ HEADER, NULL, "Available init options:" },
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{ ENVARG | 'E', "env", "set environment variable for init phase (NAME=VALUE)" },
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{ FILEARG | 'i', "initfile", "main configuation file for init phase" },
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{ 0, NULL, " (default " DATADIR "/init/00main)" },
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{ 'b', "background", "run daemon in background" },
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{ 's', "syslog", "use syslog for messages" },
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{ HEADER, NULL, "Available commands:" },
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{ CARDCMD, "store", "save current driver setup for one or each soundcards" },
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{ EMPCMD, NULL, " to configuration file" },
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{ CARDCMD, "restore", "load current driver setup for one or each soundcards" },
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{ EMPCMD, NULL, " from configuration file" },
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{ CARDCMD, "nrestore", "like restore, but notify the daemon to rescan soundcards" },
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{ CARDCMD, "init", "initialize driver to a default state" },
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{ CARDCMD, "daemon", "store state periodically for one or each soundcards" },
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{ CARDCMD, "rdaemon", "like daemon but do the state restore at first" },
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{ KILLCMD, "kill", "notify daemon to quit, rescan or save_and_quit" },
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{ 0, NULL, NULL }
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};
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static void help(void)
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{
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printf("Usage: alsactl <options> command\n");
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printf("\nAvailable global options:\n");
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printf(" -h,--help this help\n");
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printf(" -d,--debug debug mode\n");
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printf(" -v,--version print version of this program\n");
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printf("\nAvailable state options:\n");
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printf(" -f,--file # configuration file (default " SYS_ASOUNDRC ")\n");
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printf(" -l,--lock use file locking to serialize concurrent access\n");
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printf(" -F,--force try to restore the matching controls as much as possible\n");
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printf(" (default mode)\n");
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printf(" -g,--ignore ignore 'No soundcards found' error\n");
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printf(" -P,--pedantic do not restore mismatching controls (old default)\n");
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printf(" -I,--no-init-fallback\n"
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" don't initialize even if restore fails\n");
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printf(" -r,--runstate # save restore and init state to this file (only errors)\n");
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printf(" default settings is 'no file set'\n");
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printf(" -R,--remove remove runstate file at first, otherwise append errors\n");
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printf(" -p,--period store period in seconds for the daemon command\n");
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printf(" -e,--pid-file pathname for the process id (daemon mode)\n");
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printf("\nAvailable init options:\n");
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printf(" -E,--env #=# set environment variable for init phase (NAME=VALUE)\n");
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printf(" -i,--initfile # main configuation file for init phase (default " DATADIR "/init/00main)\n");
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printf("\n");
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printf("\nAvailable commands:\n");
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printf(" store <card #> save current driver setup for one or each soundcards\n");
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printf(" to configuration file\n");
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printf(" restore <card #> load current driver setup for one or each soundcards\n");
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printf(" from configuration file\n");
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printf(" nrestore <card #> like restore, but notify the daemon to rescan soundcards\n");
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printf(" init <card #> initialize driver to a default state\n");
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printf(" daemon <card #> store state periodically for one or each soundcards\n");
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printf(" rdaemon <card #> like daemon but do the state restore at first\n");
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printf(" kill <cmd> notify daemon to quit, rescan or save_and_quit\n");
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struct arg *n = args, *a;
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char *larg, sa[4], buf[32];
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int sarg;
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sa[0] = '-';
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sa[2] = ',';
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sa[3] = '\0';
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while (n->comment) {
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a = n;
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n++;
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sarg = a->sarg;
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if (sarg & (HEADER|TITLE)) {
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printf("%s%s\n", (sarg & HEADER) != 0 ? "\n" : "",
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a->comment);
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continue;
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}
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buf[0] = '\0';
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larg = a->larg;
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if (sarg & (EMPCMD|CARDCMD|KILLCMD)) {
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if (sarg & CARDCMD)
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strcat(buf, "<card>");
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else if (sarg & KILLCMD)
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strcat(buf, "<cmd>");
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printf(" %-8s %-6s %s\n", larg ? larg : "",
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buf, a->comment);
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continue;
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}
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sa[1] = a->sarg;
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sprintf(buf, "%s%s%s", sa[1] ? sa : "",
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larg ? "--" : "", larg ? larg : "");
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if (sarg & ENVARG)
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strcat(buf, " #=#");
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else if (sarg & (FILEARG|INTARG))
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strcat(buf, " #");
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printf(" %-15s %s\n", buf, a->comment);
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}
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}
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int main(int argc, char *argv[])
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{
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static const struct option long_option[] =
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{
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{"help", 0, NULL, 'h'},
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{"file", 1, NULL, 'f'},
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{"lock", 0, NULL, 'l'},
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{"env", 1, NULL, 'E'},
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{"initfile", 1, NULL, 'i'},
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{"no-init-fallback", 0, NULL, 'I'},
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{"force", 0, NULL, 'F'},
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{"ignore", 0, NULL, 'g'},
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{"pedantic", 0, NULL, 'P'},
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{"runstate", 0, NULL, 'r'},
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{"remove", 0, NULL, 'R'},
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{"period", 1, NULL, 'p'},
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{"pid-file", 1, NULL, 'e'},
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{"background", 0, NULL, 'b'},
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{"syslog", 0, NULL, 's'},
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{"debug", 0, NULL, 'd'},
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{"version", 0, NULL, 'v'},
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{NULL, 0, NULL, 0},
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};
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static const char *const devfiles[] = {
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"/dev/snd/controlC",
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"/dev/snd/pcmC",
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@ -123,18 +159,48 @@ int main(int argc, char *argv[])
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int init_fallback = 1; /* new default behavior */
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int period = 5*60;
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int background = 0;
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int res;
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struct arg *a;
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struct option *o;
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int i, j, k, res;
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struct option *long_option;
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char *short_option;
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long_option = calloc(ARRAY_SIZE(args), sizeof(struct option));
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if (long_option == NULL)
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exit(EXIT_FAILURE);
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short_option = malloc(128);
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if (short_option == NULL) {
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free(long_option);
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exit(EXIT_FAILURE);
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}
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for (i = j = k = 0; i < ARRAY_SIZE(args); i++) {
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a = &args[i];
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if ((a->sarg & 0xff) == 0)
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continue;
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o = &long_option[j];
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o->name = args->larg;
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o->has_arg = (a->sarg & (ENVARG|FILEARG|INTARG)) != 0;
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o->flag = NULL;
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o->val = a->sarg & 0xff;
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j++;
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short_option[k++] = o->val;
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if (o->has_arg)
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short_option[k++] = ':';
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}
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short_option[k] = '\0';
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command = argv[0];
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printf("short_option = '%s'\n", short_option);
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while (1) {
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int c;
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if ((c = getopt_long(argc, argv, "hdvf:lFgE:i:IPr:Rp:e:bs", long_option, NULL)) < 0)
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if ((c = getopt_long(argc, argv, short_option, long_option,
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NULL)) < 0)
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break;
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switch (c) {
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case 'h':
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help();
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return EXIT_SUCCESS;
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res = EXIT_SUCCESS;
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goto out;
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case 'f':
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cfgfile = optarg;
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break;
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@ -150,7 +216,8 @@ int main(int argc, char *argv[])
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case 'E':
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if (putenv(optarg)) {
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fprintf(stderr, "environment string '%s' is wrong\n", optarg);
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return EXIT_FAILURE;
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res = EXIT_FAILURE;
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goto out;
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}
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break;
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case 'i':
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@ -189,19 +256,24 @@ int main(int argc, char *argv[])
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break;
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case 'v':
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printf("alsactl version " SND_UTIL_VERSION_STR "\n");
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return EXIT_SUCCESS;
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res = EXIT_SUCCESS;
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goto out;
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case '?': // error msg already printed
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help();
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return EXIT_FAILURE;
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break;
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res = EXIT_FAILURE;
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goto out;
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default: // should never happen
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fprintf(stderr,
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"Invalid option '%c' (%d) not handled??\n", c, c);
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}
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}
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free(short_option);
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free(long_option);
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long_option = NULL;
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if (argc - optind <= 0) {
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fprintf(stderr, "alsactl: Specify command...\n");
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return 0;
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res = 0;
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goto out;
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}
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cardname = argc - optind > 1 ? argv[optind + 1] : NULL;
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@ -261,4 +333,9 @@ int main(int argc, char *argv[])
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closelog();
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}
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return res < 0 ? -res : 0;
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out:
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free(short_option);
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free(long_option);
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return res;
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}
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@ -52,3 +52,5 @@ static inline int hextodigit(int c)
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return -1;
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return c;
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}
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#define ARRAY_SIZE(a) (sizeof (a) / sizeof (a)[0])
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@ -31,9 +31,6 @@
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#include "alsactl.h"
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#define ARRAY_SIZE(a) (sizeof (a) / sizeof (a)[0])
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static char *id_str(snd_ctl_elem_id_t *id)
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{
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static char str[128];
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