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Try to make sure that the standard descriptors are connected when calling
gpgsm.
This commit is contained in:
Werner Koch
parent
e09e3fa4ea
commit
033a2c0bc9
@ -1,3 +1,7 @@
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2007-12-03 Werner Koch <wk@g10code.com>
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* sysutils.c (gnupg_reopen_std): New. Taken from ../g10/gpg.c.
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2007-11-27 Werner Koch <wk@g10code.com>
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* Makefile.am (CLEANFILES): New.
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@ -48,6 +48,7 @@
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#ifdef HAVE_PTH
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# include <pth.h>
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#endif
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#include <fcntl.h>
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#include "util.h"
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#include "i18n.h"
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@ -119,7 +120,7 @@ enable_core_dumps (void)
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return 1;
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limit.rlim_cur = limit.rlim_max;
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setrlimit (RLIMIT_CORE, &limit);
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return 1; /* We always return true because trhis function is
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return 1; /* We always return true because this function is
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merely a debugging aid. */
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# endif
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return 1;
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@ -397,3 +398,76 @@ gnupg_tmpfile (void)
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return tmpfile ();
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#endif /*!HAVE_W32_SYSTEM*/
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}
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/* Make sure that the standard file descriptors are opened. Obviously
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some folks close them before an exec and the next file we open will
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get one of them assigned and thus any output (i.e. diagnostics) end
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up in that file (e.g. the trustdb). Not actually a gpg problem as
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this will hapen with almost all utilities when called in a wrong
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way. However we try to minimize the damage here and raise
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awareness of the problem.
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Must be called before we open any files! */
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void
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gnupg_reopen_std (const char *pgmname)
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{
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#if defined(HAVE_STAT) && !defined(HAVE_W32_SYSTEM)
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struct stat statbuf;
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int did_stdin = 0;
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int did_stdout = 0;
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int did_stderr = 0;
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FILE *complain;
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if (fstat (STDIN_FILENO, &statbuf) == -1 && errno ==EBADF)
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{
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if (open ("/dev/null",O_RDONLY) == STDIN_FILENO)
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did_stdin = 1;
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else
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did_stdin = 2;
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}
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if (fstat (STDOUT_FILENO, &statbuf) == -1 && errno == EBADF)
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{
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if (open ("/dev/null",O_WRONLY) == STDOUT_FILENO)
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did_stdout = 1;
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else
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did_stdout = 2;
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}
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if (fstat (STDERR_FILENO, &statbuf)==-1 && errno==EBADF)
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{
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if (open ("/dev/null", O_WRONLY) == STDERR_FILENO)
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did_stderr = 1;
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else
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did_stderr = 2;
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}
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/* It's hard to log this sort of thing since the filehandle we would
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complain to may be closed... */
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if (!did_stderr)
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complain = stderr;
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else if (!did_stdout)
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complain = stdout;
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else
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complain = NULL;
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if (complain)
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{
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if (did_stdin == 1)
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fprintf (complain, "%s: WARNING: standard input reopened\n", pgmname);
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if (did_stdout == 1)
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fprintf (complain, "%s: WARNING: standard output reopened\n", pgmname);
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if (did_stderr == 1)
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fprintf (complain, "%s: WARNING: standard error reopened\n", pgmname);
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if (did_stdin == 2 || did_stdout == 2 || did_stderr == 2)
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fprintf(complain,"%s: fatal: unable to reopen standard input,"
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" output, or error\n", pgmname);
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}
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if (did_stdin == 2 || did_stdout == 2 || did_stderr == 2)
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exit (3);
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#endif /* HAVE_STAT && !HAVE_W32_SYSTEM */
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}
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@ -46,6 +46,7 @@ void gnupg_sleep (unsigned int seconds);
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int translate_sys2libc_fd (gnupg_fd_t fd, int for_write);
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int translate_sys2libc_fd_int (int fd, int for_write);
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FILE *gnupg_tmpfile (void);
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void gnupg_reopen_std (const char *pgmname);
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#ifdef HAVE_W32_SYSTEM
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@ -1,3 +1,10 @@
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2007-12-03 Werner Koch <wk@g10code.com>
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* gpg.c (reopen_std): Moved to ../common and renamed to
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gnupg_reopen_std.
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* gpg.c: Remove second inclusion of fcntl.h.
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2007-11-19 Werner Koch <wk@g10code.com>
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* keyedit.c (keyedit_menu): String grammar fix.
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75
g10/gpg.c
75
g10/gpg.c
@ -26,9 +26,6 @@
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#include <ctype.h>
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#include <unistd.h>
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#include <assert.h>
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#ifdef HAVE_DOSISH_SYSTEM
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#include <fcntl.h> /* for setmode() */
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#endif
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#ifdef HAVE_STAT
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#include <sys/stat.h> /* for stat() */
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#endif
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@ -1687,76 +1684,6 @@ parse_trust_model(const char *model)
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}
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/* Make sure that the standard file descriptors are opened. Obviously
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some folks close them before an exec and the next file we open will
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get one of them assigned and thus any output (i.e. diagnostics) end
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up in that file (e.g. the trustdb). Not actually a gpg problem as
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this will hapenn with almost all utilities when called in a wrong
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way. However we try to minimize the damage here and raise
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awareness of the problem.
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Must be called before we open any files! */
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static void
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reopen_std(void)
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{
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#if defined(HAVE_STAT) && !defined(HAVE_W32_SYSTEM)
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struct stat statbuf;
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int did_stdin=0,did_stdout=0,did_stderr=0;
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FILE *complain;
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if(fstat(STDIN_FILENO,&statbuf)==-1 && errno==EBADF)
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{
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if(open("/dev/null",O_RDONLY)==STDIN_FILENO)
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did_stdin=1;
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else
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did_stdin=2;
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}
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if(fstat(STDOUT_FILENO,&statbuf)==-1 && errno==EBADF)
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{
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if(open("/dev/null",O_WRONLY)==STDOUT_FILENO)
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did_stdout=1;
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else
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did_stdout=2;
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}
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if(fstat(STDERR_FILENO,&statbuf)==-1 && errno==EBADF)
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{
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if(open("/dev/null",O_WRONLY)==STDERR_FILENO)
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did_stderr=1;
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else
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did_stderr=2;
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}
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/* It's hard to log this sort of thing since the filehandle we would
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complain to may be closed... */
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if(did_stderr==0)
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complain=stderr;
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else if(did_stdout==0)
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complain=stdout;
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else
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complain=NULL;
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if(complain)
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{
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if(did_stdin==1)
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fprintf(complain,"gpg: WARNING: standard input reopened\n");
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if(did_stdout==1)
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fprintf(complain,"gpg: WARNING: standard output reopened\n");
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if(did_stderr==1)
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fprintf(complain,"gpg: WARNING: standard error reopened\n");
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if(did_stdin==2 || did_stdout==2 || did_stderr==2)
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fprintf(complain,"gpg: fatal: unable to reopen standard input,"
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" output, or error\n");
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}
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if(did_stdin==2 || did_stdout==2 || did_stderr==2)
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exit(3);
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#endif /* HAVE_STAT && !HAVE_W32_SYSTEM */
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}
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/* Pack an s2k iteration count into the form specified in 2440. If
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we're in between valid values, round up. */
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static unsigned char
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@ -1855,7 +1782,7 @@ main (int argc, char **argv )
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/* Please note that we may running SUID(ROOT), so be very CAREFUL
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when adding any stuff between here and the call to
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secmem_init() somewhere after the option parsing. */
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reopen_std ();
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gnupg_reopen_std ("gpg");
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trap_unaligned ();
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gnupg_rl_initialize ();
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set_strusage (my_strusage);
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@ -1,3 +1,7 @@
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2007-12-03 Werner Koch <wk@g10code.com>
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* gpgsm.c (main): All gnupg_reopen_std.
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h2007-11-22 Werner Koch <wk@g10code.com>
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* server.c (cmd_getauditlog): New.
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@ -851,6 +851,7 @@ main ( int argc, char **argv)
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/*mtrace();*/
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gnupg_reopen_std ("gpgsm");
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/* trap_unaligned ();*/
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gnupg_rl_initialize ();
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set_strusage (my_strusage);
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