* GNU General Public License for more details.
*/
+#define _GNU_SOURCE
#include <libubox/avl.h>
#include <libubox/avl-cmp.h>
#include "utils.h"
+#include <regex.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+
+#include "../log.h"
+
+#ifndef O_PATH
+#define O_PATH 010000000
+#endif
void
__blobmsg_list_init(struct blobmsg_list *list, int offset, int len, blobmsg_list_cmp cmp)
return true;
}
+
+char *get_active_console(char *out, int len)
+{
+ char line[CMDLINE_SIZE + 1];
+ int fd = open("/sys/class/tty/console/active", O_RDONLY);
+ ssize_t r = read(fd, line, sizeof(line) - 1);
+
+ close(fd);
+
+ if (r <= 0)
+ return NULL;
+
+ /* The active file is terminated by a newline which we need to strip */
+ char *newline = strtok(line, "\n");
+
+ if (newline != NULL) {
+ strncpy(out, newline, len);
+ return out;
+ }
+
+ return NULL;
+}
+
+char* get_cmdline_val(const char* name, char* out, int len)
+{
+ char line[CMDLINE_SIZE + 1], *c, *sptr;
+ int fd = open("/proc/cmdline", O_RDONLY);
+ ssize_t r = read(fd, line, sizeof(line) - 1);
+ close(fd);
+
+ if (r <= 0)
+ return NULL;
+
+ line[r] = 0;
+
+ for (c = strtok_r(line, " \t\n", &sptr); c;
+ c = strtok_r(NULL, " \t\n", &sptr)) {
+ char *sep = strchr(c, '=');
+ if (sep == NULL)
+ continue;
+
+ ssize_t klen = sep - c;
+ if (strncmp(name, c, klen) || name[klen] != 0)
+ continue;
+
+ strncpy(out, &sep[1], len);
+ out[len-1] = 0;
+ return out;
+ }
+
+ return NULL;
+}
+
+int patch_fd(const char *device, int fd, int flags)
+{
+ int dfd, nfd;
+
+ if (device == NULL)
+ device = "/dev/null";
+
+ if (*device != '/') {
+ dfd = open("/dev", O_PATH|O_DIRECTORY);
+
+ if (dfd < 0)
+ return -1;
+
+ nfd = openat(dfd, device, flags);
+
+ close(dfd);
+ } else {
+ nfd = open(device, flags);
+ }
+
+ if (nfd < 0 && strcmp(device, "/dev/null"))
+ nfd = open("/dev/null", flags);
+
+ if (nfd < 0)
+ return -1;
+
+ fd = dup2(nfd, fd);
+
+ if (nfd > STDERR_FILENO)
+ close(nfd);
+
+ return (fd < 0) ? -1 : 0;
+}
+
+int patch_stdio(const char *device)
+{
+ int fd, rv = 0;
+ const char *fdname[3] = { "stdin", "stdout", "stderr" };
+
+ for (fd = STDIN_FILENO; fd <= STDERR_FILENO; fd++) {
+ if (patch_fd(device, fd, fd ? O_WRONLY : O_RDONLY)) {
+ ERROR("Failed to redirect %s to %s: %m\n",
+ fdname[fd], device);
+ rv = -1;
+ }
+ }
+
+ return rv;
+}