ctrl/ctrl.c at main · 0x1eef/ctrl · GitHub

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#include "ctrl.h"
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>

static int OPEN_FLAGS = O_PATH | O_CLOEXEC | O_NOFOLLOW;

static int
set_feature(hbsdctrl_ctx_t*, const char*, const char*, int);

int
enable_feature(hbsdctrl_ctx_t* ctx, const char* name, const char* path)
{
    return set_feature(ctx, name, path, 1);
}

int
disable_feature(hbsdctrl_ctx_t* ctx, const char* name, const char* path)
{
    return set_feature(ctx, name, path, 2);
}

int
sysdef_feature(hbsdctrl_ctx_t* ctx, const char* name, const char* path)
{
    return set_feature(ctx, name, path, -1);
}

int
feature_status(hbsdctrl_ctx_t* ctx,
               const char* name,
               const char* path,
               char** status)
{
    hbsdctrl_feature_t* feature;
    hbsdctrl_feature_state_t state;
    int res = 0, fd = -1;

    errno = 0;
    if (ctx == NULL) {
        res = -1;
        goto done;
    }
    if ((fd = open(path, OPEN_FLAGS)) == -1) {
        res = -1;
        goto done;
    }
    if ((feature = hbsdctrl_ctx_find_feature_by_name(ctx, name)) == NULL) {
        res = -1;
        goto done;
    }
    if (feature->hf_get(ctx, feature, &fd, &state) == RES_FAIL) {
        res = -1;
        goto done;
    } else {
        errno = 0;
    }
    *status = (char*)hbsdctrl_feature_state_to_string(&state);
    goto done;
done:
    if (fd != -1)
        close(fd);
    if (errno != 0)
        return errno;
    return res;
}

static int
set_feature(hbsdctrl_ctx_t* ctx, const char* name, const char* path, int state)
{
    hbsdctrl_feature_t* feature;
    int res = 0, fd = -1;

    errno = 0;
    if (ctx == NULL) {
        res = -1;
        goto done;
    }
    if ((feature = hbsdctrl_ctx_find_feature_by_name(ctx, name)) == NULL) {
        res = -1;
        goto done;
    }
    if ((fd = open(path, OPEN_FLAGS)) == -1) {
        res = -1;
        goto done;
    }
    if (state == -1) {
        if (feature->hf_unapply(ctx, feature, &fd, NULL) == RES_FAIL) {
            res = -1;
            goto done;
        } else {
            errno = 0;
        }
    } else {
        if (feature->hf_apply(ctx, feature, &fd, &state) == RES_FAIL) {
            res = -1;
            goto done;
        }
    }
    goto done;
done:
    if (fd != -1)
        close(fd);
    if (errno != 0)
        return errno;
    return res;
}