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Viewing changes to plugins.d/usplash.c

  • Committer: Teddy Hogeborn
  • Date: 2009-09-08 06:28:20 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090908062820-xgkdkrnvuze9vc72
* debian/mandos-client.README.Debian: Improved wording and formatting.
                                      Updated location of nfsroot.txt.
* debian/mandos.README.Debian: Improved wording and formatting.

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plugins.d/usplash.c
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 * along with this program.  If not, see
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 * <http://www.gnu.org/licenses/>.
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 * 
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 * Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
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 * <https://www.fukt.bsnet.se/~teddy/>.
 
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 * Contact the authors at <mandos@fukt.bsnet.se>.
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 */
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#define _GNU_SOURCE             /* asprintf() */
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                                   dirent */
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#include <stddef.h>             /* NULL */
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#include <string.h>             /* strlen(), memcmp() */
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#include <stdio.h>              /* asprintf(), perror(), sscanf() */
 
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#include <stdio.h>              /* asprintf(), perror() */
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#include <unistd.h>             /* close(), write(), readlink(),
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                                   read(), STDOUT_FILENO, sleep(),
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                                   fork(), setuid(), geteuid(),
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                                   EXIT_SUCCESS, malloc(), _exit() */
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#include <stdlib.h>             /* getenv() */
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#include <dirent.h>             /* opendir(), readdir(), closedir() */
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#include <inttypes.h>           /* intmax_t, SCNdMAX */
 
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#include <inttypes.h>           /* intmax_t, strtoimax() */
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#include <sys/stat.h>           /* struct stat, lstat(), S_ISLNK */
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sig_atomic_t interrupted_by_signal = 0;
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   */
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  int ret;
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  int fifo_fd;
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  do{
 
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  do {
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    fifo_fd = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
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    if(fifo_fd == -1 and (errno != EINTR or interrupted_by_signal)){
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      return false;
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    }
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  }while(fifo_fd == -1);
 
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  } while(fifo_fd == -1);
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  const char *cmd_line;
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  size_t cmd_line_len;
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  if(arg == NULL){
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    cmd_line = cmd;
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    cmd_line_len = strlen(cmd);
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  }else{
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    do{
 
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  } else {
 
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    do {
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      ret = asprintf(&cmd_line_alloc, "%s %s", cmd, arg);
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      if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
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        int e = errno;
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        errno = e;
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        return false;
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      }
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    }while(ret == -1);
 
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    } while(ret == -1);
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    cmd_line = cmd_line_alloc;
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    cmd_line_len = (size_t)ret + 1;
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  }
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    written += (size_t)sret;
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  }
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  free(cmd_line_alloc);
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  do{
 
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  do {
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    ret = close(fifo_fd);
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    if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
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      return false;
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    }
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  }while(ret == -1);
 
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  } while(ret == -1);
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  if(interrupted_by_signal){
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    return false;
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  }
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      pid_t pid;
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      {
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        intmax_t tmpmax;
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        int numchars;
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        ret = sscanf(proc_ent->d_name, "%" SCNdMAX "%n", &tmpmax,
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                     &numchars);
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        if(ret < 1 or tmpmax != (pid_t)tmpmax
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           or proc_ent->d_name[numchars] != '\0'){
 
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        char *tmp;
 
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        errno = 0;
 
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        tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
 
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        if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
 
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           or tmpmax != (pid_t)tmpmax){
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          /* Not a process */
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          continue;
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        }
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          size_t cmdline_allocated = 0;
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          char *tmp;
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          const size_t blocksize = 1024;
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          do{
 
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          do {
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            if(cmdline_len + blocksize > cmdline_allocated){
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              tmp = realloc(cmdline, cmdline_allocated + blocksize);
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              if(tmp == NULL){
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    /* Open FIFO */
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    int fifo_fd;
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    do{
 
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    do {
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      fifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
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      if(fifo_fd == -1){
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        if(errno != EINTR){
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          break;
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        }
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      }
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    }while(fifo_fd == -1);
 
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    } while(fifo_fd == -1);
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    if(interrupted_by_signal or an_error_occured){
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      break;                    /* Big */
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    }
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    /* Read from FIFO */
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    size_t buf_allocated = 0;
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    const size_t blocksize = 1024;
389
 
    do{
 
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    do {
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      if(buf_len + blocksize > buf_allocated){
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        char *tmp = realloc(buf, buf_allocated + blocksize);
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        if(tmp == NULL){
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        buf = tmp;
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        buf_allocated += blocksize;
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      }
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      do{
 
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      do {
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        sret = read(fifo_fd, buf + buf_len, buf_allocated - buf_len);
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        if(sret == -1){
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          if(errno != EINTR){
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            break;
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          }
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        }
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      }while(sret == -1);
 
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      } while(sret == -1);
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      if(interrupted_by_signal or an_error_occured){
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        break;
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      }
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      buf_len += (size_t)sret;
418
 
    }while(sret != 0);
 
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    } while(sret != 0);
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    close(fifo_fd);
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    if(interrupted_by_signal or an_error_occured){
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      break;                    /* Big */
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    /* Print password to stdout */
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    size_t written = 0;
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    while(written < buf_len){
436
 
      do{
 
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      do {
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        sret = write(STDOUT_FILENO, buf + written, buf_len - written);
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        if(sret == -1){
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          if(errno != EINTR){
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            break;
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          }
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        }
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      }while(sret == -1);
 
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      } while(sret == -1);
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      if(interrupted_by_signal or an_error_occured){
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        break;
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      }