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#include "envctl.h"
#include "core.h"
struct EnvCtl *envctl_init() {
struct EnvCtl *result;
result = calloc(1, sizeof(*result));
if (!result) {
return NULL;
}
result->num_alloc = STASIS_ENVCTL_DEFAULT_ALLOC;
result->item = calloc(result->num_alloc + 1, sizeof(result->item));
if (!result->item) {
guard_free(result);
return NULL;
}
return result;
}
static int callback_builtin_nop(const void *a, const void *b) {
return STASIS_ENVCTL_RET_SUCCESS;
}
int envctl_register(struct EnvCtl **envctl, unsigned flags, envctl_except_fn *callback, const char *name) {
if ((*envctl)->num_used == (*envctl)->num_alloc) {
(*envctl)->num_alloc += STASIS_ENVCTL_DEFAULT_ALLOC;
struct EnvCtl_Item **tmp = realloc((*envctl)->item, (*envctl)->num_alloc + 1 * sizeof((*envctl)->item));
if (!tmp) {
return 1;
} else {
(*envctl)->item = tmp;
}
}
struct EnvCtl_Item **item = (*envctl)->item;
item[(*envctl)->num_used] = calloc(1, sizeof(*item[0]));
if (!item[(*envctl)->num_used]) {
return 1;
}
if (!callback) {
callback = &callback_builtin_nop;
}
item[(*envctl)->num_used]->callback = callback;
item[(*envctl)->num_used]->name = name;
item[(*envctl)->num_used]->flags = flags;
(*envctl)->num_used++;
return 0;
}
size_t envctl_get_index(const struct EnvCtl *envctl, const char *name) {
for (size_t i = 0; i < envctl->num_used; i++) {
if (!strcmp(envctl->item[i]->name, name)) {
// pack state flag, outer (struct) index and inner (name) index
return 1L << 63L | i;
}
}
return 0;
}
void envctl_decode_index(size_t in_i, size_t *state, size_t *out_i, size_t *name_i) {
*state = ((in_i >> 63L) & 1);
*out_i = in_i & 0xffffffffL;
}
unsigned envctl_check_required(unsigned flags) {
return flags & STASIS_ENVCTL_REQUIRED;
}
unsigned envctl_check_redact(unsigned flags) {
return flags & STASIS_ENVCTL_REDACT;
}
int envctl_check_present(const struct EnvCtl_Item *item, const char *name) {
return ((!strcmp(item->name, name)) && getenv(name)) ? 1 : 0;
}
unsigned envctl_get_flags(const struct EnvCtl *envctl, const char *name) {
size_t poll_index = envctl_get_index(envctl, name);
size_t id = 0;
size_t name_id = 0;
size_t state = 0;
envctl_decode_index(poll_index, &state, &id, &name_id);
if (!state) {
return 0;
} else {
fprintf(stderr, "managed environment variable: %s\n", name);
}
return envctl->item[id]->flags;
}
void envctl_do_required(const struct EnvCtl *envctl, int verbose) {
for (size_t i = 0; i < envctl->num_used; i++) {
struct EnvCtl_Item *item = envctl->item[i];
const char *name = item->name;
envctl_except_fn *callback = item->callback;
if (verbose) {
msg(STASIS_MSG_L2, "Verifying %s\n", name);
}
int code = callback((const void *) item, (const void *) name);
if (code == STASIS_ENVCTL_RET_IGNORE || code == STASIS_ENVCTL_RET_SUCCESS) {
continue;
} else if (code == STASIS_ENVCTL_RET_FAIL) {
fprintf(stderr, "\n%s must be set. Exiting.\n", name);
exit(1);
} else {
fprintf(stderr, "\nan unknown envctl callback code occurred: %d\n", code);
exit(1);
}
}
}
void envctl_free(struct EnvCtl **envctl) {
if (!envctl) {
return;
}
for (size_t i = 0; i < (*envctl)->num_used; i++) {
guard_free((*envctl)->item[i]);
}
guard_free((*envctl)->item);
guard_free(*envctl);
}
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