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  • Committer: Teddy Hogeborn
  • Date: 2014-08-09 23:37:07 UTC
  • mto: (237.7.304 trunk)
  • mto: This revision was merged to the branch mainline in revision 323.
  • Revision ID: teddy@recompile.se-20140809233707-6c5qyievp78lnzf1
askpass-fifo: Lower privileges after opening FIFO.

* plugins.d/askpass-fifo.c (main): Lower privileges after opening FIFO.

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plugins.d/askpass-fifo.c
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 */
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#define _GNU_SOURCE             /* TEMP_FAILURE_RETRY() */
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#include <sys/types.h>          /* ssize_t */
 
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#include <sys/types.h>          /* uid_t, gid_t, ssize_t */
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#include <sys/stat.h>           /* mkfifo(), S_IRUSR, S_IWUSR */
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#include <iso646.h>             /* and */
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#include <errno.h>              /* errno, EACCES, ENOTDIR, ELOOP,
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#include <string.h>             /* strerror() */
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#include <stdarg.h>             /* va_list, va_start(), ... */
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uid_t uid = 65534;
 
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gid_t gid = 65534;
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/* Function to use when printing errors */
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__attribute__((format (gnu_printf, 3, 4)))
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  int ret = 0;
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  ssize_t sret;
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  uid = getuid();
 
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  gid = getgid();
 
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  /* Create FIFO */
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  const char passfifo[] = "/lib/cryptsetup/passfifo";
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  ret = mkfifo(passfifo, S_IRUSR | S_IWUSR);
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    }
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  }
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  /* Lower group privileges  */
 
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  if(setgid(gid) == -1){
 
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    error_plus(0, errno, "setgid");
 
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  }
 
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  /* Lower user privileges */
 
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  if(setuid(uid) == -1){
 
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    error_plus(0, errno, "setuid");
 
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  }
 
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  /* Read from FIFO */
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  char *buf = NULL;
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  size_t buf_len = 0;