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conf: load function (hook) - add OR support

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While I was trying to work on XDG_CONFIG_HOME support, I though
that it may be nice to support OR for the file specification.

But then I found that we can already do this via the refer hook.

I commit this change anyway, because the snd_config_hook_load()
function is more clean now.

The OR is implemented with three | characters like:

  "~/.asoundrc|||~/.asoundrc2|||/opt/some/other/path"

(first file found wins)

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2020-06-04 17:28:25 +02:00
parent 4882da2c3e
commit 1fa7d670f8
1 changed files with 78 additions and 67 deletions
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143
src/conf.c
View file

@ -3819,6 +3819,63 @@ static int config_file_open(snd_config_t *root, const char *filename)
return err;
}
static int config_file_load(snd_config_t *root, const char *fn, int errors)
{
struct stat st;
struct dirent **namelist;
int err, n;
if (!errors && access(fn, R_OK) < 0)
return 1;
if (stat(fn, &st) < 0) {
SNDERR("cannot stat file/directory %s", fn);
return 1;
}
if (!S_ISDIR(st.st_mode))
return config_file_open(root, fn);
#ifndef DOC_HIDDEN
#if defined(_GNU_SOURCE) && !defined(__NetBSD__) && !defined(__FreeBSD__) && !defined(__sun) && !defined(ANDROID)
#define SORTFUNC versionsort
#else
#define SORTFUNC alphasort
#endif
#endif
n = scandir(fn, &namelist, config_filename_filter, SORTFUNC);
if (n > 0) {
int j;
err = 0;
for (j = 0; j < n; ++j) {
if (err >= 0) {
int sl = strlen(fn) + strlen(namelist[j]->d_name) + 2;
char *filename = malloc(sl);
snprintf(filename, sl, "%s/%s", fn, namelist[j]->d_name);
filename[sl-1] = '\0';
err = config_file_open(root, filename);
free(filename);
}
free(namelist[j]);
}
free(namelist);
if (err < 0)
return err;
}
return 0;
}
static int config_file_load_user(snd_config_t *root, const char *fn, int errors)
{
char *fn2;
int err;
err = snd_user_file(fn, &fn2);
if (err < 0)
return config_file_load(root, fn, errors);
err = config_file_load(root, fn2, errors);
free(fn2);
return err;
}
/**
* \brief Loads and parses the given configurations files.
* \param[in] root Handle to the root configuration node.
@ -3835,8 +3892,7 @@ int snd_config_hook_load(snd_config_t *root, snd_config_t *config, snd_config_t
{
snd_config_t *n;
snd_config_iterator_t i, next;
struct finfo *fi = NULL;
int err, idx = 0, fi_count = 0, errors = 1, hit;
int err, idx = 0, errors = 1, hit;
assert(root && dst);
if ((err = snd_config_search(config, "errors", &n)) >= 0) {
@ -3863,20 +3919,6 @@ int snd_config_hook_load(snd_config_t *root, snd_config_t *config, snd_config_t
SNDERR("Invalid type for field filenames");
goto _err;
}
snd_config_for_each(i, next, n) {
snd_config_t *c = snd_config_iterator_entry(i);
const char *str;
if ((err = snd_config_get_string(c, &str)) < 0) {
SNDERR("Field %s is not a string", c->id);
goto _err;
}
fi_count++;
}
fi = calloc(fi_count, sizeof(*fi));
if (fi == NULL) {
err = -ENOMEM;
goto _err;
}
do {
hit = 0;
snd_config_for_each(i, next, n) {
@ -3890,67 +3932,36 @@ int snd_config_hook_load(snd_config_t *root, snd_config_t *config, snd_config_t
goto _err;
}
if (i == idx) {
char *name;
char *name, *name2, *remain;
if ((err = snd_config_get_ascii(n, &name)) < 0)
goto _err;
if ((err = snd_user_file(name, &fi[idx].name)) < 0)
fi[idx].name = name;
else
name2 = name;
remain = strstr(name, "|||");
while (1) {
if (remain) {
*remain = '\0';
remain += 3;
}
printf("name2 = '%s', remain = '%s'\n", name2, remain);
err = config_file_load_user(root, name2, errors);
if (err < 0)
goto _err;
if (err == 0) /* first hit wins */
break;
if (!remain)
break;
name2 = remain;
remain = strstr(remain, "|||");
}
free(name);
idx++;
hit = 1;
}
}
} while (hit);
for (idx = 0; idx < fi_count; idx++) {
struct stat st;
if (!errors && access(fi[idx].name, R_OK) < 0)
continue;
if (stat(fi[idx].name, &st) < 0) {
SNDERR("cannot stat file/directory %s", fi[idx].name);
continue;
}
if (S_ISDIR(st.st_mode)) {
struct dirent **namelist;
int n;
#ifndef DOC_HIDDEN
#if defined(_GNU_SOURCE) && !defined(__NetBSD__) && !defined(__FreeBSD__) && !defined(__sun) && !defined(ANDROID)
#define SORTFUNC versionsort
#else
#define SORTFUNC alphasort
#endif
#endif
n = scandir(fi[idx].name, &namelist, config_filename_filter, SORTFUNC);
if (n > 0) {
int j;
err = 0;
for (j = 0; j < n; ++j) {
if (err >= 0) {
int sl = strlen(fi[idx].name) + strlen(namelist[j]->d_name) + 2;
char *filename = malloc(sl);
snprintf(filename, sl, "%s/%s", fi[idx].name, namelist[j]->d_name);
filename[sl-1] = '\0';
err = config_file_open(root, filename);
free(filename);
}
free(namelist[j]);
}
free(namelist);
if (err < 0)
goto _err;
}
} else if ((err = config_file_open(root, fi[idx].name)) < 0)
goto _err;
}
*dst = NULL;
err = 0;
_err:
if (fi)
for (idx = 0; idx < fi_count; idx++)
free(fi[idx].name);
free(fi);
snd_config_delete(n);
return err;
}