mirror of
git://git.gnupg.org/gnupg.git
synced 2025-02-11 18:13:04 +01:00
e33111fcda
* common/exechelp-posix.c (struct terminated_child): New definition. (terminated_children): New variable. (store_result): New function. (get_result): Likewise. (gnupg_wait_process): Store results that were not requested and consider previously stored results. waitpid(2) may return information about terminated children that we did not yet request, and there is no portable way to wait for a specific set of children. As a workaround, we store the results of children for later use. Signed-off-by: Justus Winter <justus@g10code.com>
837 lines
20 KiB
C
837 lines
20 KiB
C
/* exechelp.c - Fork and exec helpers for POSIX
|
||
* Copyright (C) 2004, 2007, 2008, 2009,
|
||
* 2010 Free Software Foundation, Inc.
|
||
*
|
||
* This file is part of GnuPG.
|
||
*
|
||
* This file is free software; you can redistribute it and/or modify
|
||
* it under the terms of either
|
||
*
|
||
* - the GNU Lesser General Public License as published by the Free
|
||
* Software Foundation; either version 3 of the License, or (at
|
||
* your option) any later version.
|
||
*
|
||
* or
|
||
*
|
||
* - the GNU General Public License as published by the Free
|
||
* Software Foundation; either version 2 of the License, or (at
|
||
* your option) any later version.
|
||
*
|
||
* or both in parallel, as here.
|
||
*
|
||
* This file is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
* GNU General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU General Public License
|
||
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
||
*/
|
||
|
||
#include <config.h>
|
||
|
||
#if defined(HAVE_W32_SYSTEM) || defined (HAVE_W32CE_SYSTEM)
|
||
#error This code is only used on POSIX
|
||
#endif
|
||
|
||
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <stdint.h>
|
||
#include <string.h>
|
||
#include <errno.h>
|
||
#include <assert.h>
|
||
#ifdef HAVE_SIGNAL_H
|
||
# include <signal.h>
|
||
#endif
|
||
#include <unistd.h>
|
||
#include <fcntl.h>
|
||
|
||
#ifdef WITHOUT_NPTH /* Give the Makefile a chance to build without Pth. */
|
||
#undef HAVE_NPTH
|
||
#undef USE_NPTH
|
||
#endif
|
||
|
||
#ifdef HAVE_NPTH
|
||
#include <npth.h>
|
||
#endif
|
||
#include <sys/wait.h>
|
||
|
||
#ifdef HAVE_GETRLIMIT
|
||
#include <sys/time.h>
|
||
#include <sys/resource.h>
|
||
#endif /*HAVE_GETRLIMIT*/
|
||
|
||
#ifdef HAVE_STAT
|
||
# include <sys/stat.h>
|
||
#endif
|
||
|
||
#if __linux__
|
||
# include <sys/types.h>
|
||
# include <dirent.h>
|
||
#endif /*__linux__ */
|
||
|
||
#include "util.h"
|
||
#include "i18n.h"
|
||
#include "sysutils.h"
|
||
#include "exechelp.h"
|
||
|
||
|
||
/* Helper */
|
||
static inline gpg_error_t
|
||
my_error_from_syserror (void)
|
||
{
|
||
return gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
|
||
}
|
||
|
||
static inline gpg_error_t
|
||
my_error (int errcode)
|
||
{
|
||
return gpg_err_make (default_errsource, errcode);
|
||
}
|
||
|
||
|
||
/* Return the maximum number of currently allowed open file
|
||
descriptors. Only useful on POSIX systems but returns a value on
|
||
other systems too. */
|
||
int
|
||
get_max_fds (void)
|
||
{
|
||
int max_fds = -1;
|
||
#ifdef HAVE_GETRLIMIT
|
||
struct rlimit rl;
|
||
|
||
/* Under Linux we can figure out the highest used file descriptor by
|
||
* reading /proc/PID/fd. This is in the common cases much fast than
|
||
* for example doing 4096 close calls where almost all of them will
|
||
* fail. On a system with a limit of 4096 files and only 8 files
|
||
* open with the highest number being 10, we speedup close_all_fds
|
||
* from 125ms to 0.4ms including readdir.
|
||
*
|
||
* Another option would be to close the file descriptors as returned
|
||
* from reading that directory - however then we need to snapshot
|
||
* that list before starting to close them. */
|
||
#ifdef __linux__
|
||
{
|
||
DIR *dir = NULL;
|
||
struct dirent *dir_entry;
|
||
const char *s;
|
||
int x;
|
||
|
||
dir = opendir ("/proc/self/fd");
|
||
if (dir)
|
||
{
|
||
while ((dir_entry = readdir (dir)))
|
||
{
|
||
s = dir_entry->d_name;
|
||
if ( *s < '0' || *s > '9')
|
||
continue;
|
||
x = atoi (s);
|
||
if (x > max_fds)
|
||
max_fds = x;
|
||
}
|
||
closedir (dir);
|
||
}
|
||
if (max_fds != -1)
|
||
return max_fds + 1;
|
||
}
|
||
#endif /* __linux__ */
|
||
|
||
|
||
# ifdef RLIMIT_NOFILE
|
||
if (!getrlimit (RLIMIT_NOFILE, &rl))
|
||
max_fds = rl.rlim_max;
|
||
# endif
|
||
|
||
# ifdef RLIMIT_OFILE
|
||
if (max_fds == -1 && !getrlimit (RLIMIT_OFILE, &rl))
|
||
max_fds = rl.rlim_max;
|
||
|
||
# endif
|
||
#endif /*HAVE_GETRLIMIT*/
|
||
|
||
#ifdef _SC_OPEN_MAX
|
||
if (max_fds == -1)
|
||
{
|
||
long int scres = sysconf (_SC_OPEN_MAX);
|
||
if (scres >= 0)
|
||
max_fds = scres;
|
||
}
|
||
#endif
|
||
|
||
#ifdef _POSIX_OPEN_MAX
|
||
if (max_fds == -1)
|
||
max_fds = _POSIX_OPEN_MAX;
|
||
#endif
|
||
|
||
#ifdef OPEN_MAX
|
||
if (max_fds == -1)
|
||
max_fds = OPEN_MAX;
|
||
#endif
|
||
|
||
if (max_fds == -1)
|
||
max_fds = 256; /* Arbitrary limit. */
|
||
|
||
/* AIX returns INT32_MAX instead of a proper value. We assume that
|
||
this is always an error and use an arbitrary limit. */
|
||
#ifdef INT32_MAX
|
||
if (max_fds == INT32_MAX)
|
||
max_fds = 256;
|
||
#endif
|
||
|
||
return max_fds;
|
||
}
|
||
|
||
|
||
/* Close all file descriptors starting with descriptor FIRST. If
|
||
EXCEPT is not NULL, it is expected to be a list of file descriptors
|
||
which shall not be closed. This list shall be sorted in ascending
|
||
order with the end marked by -1. */
|
||
void
|
||
close_all_fds (int first, int *except)
|
||
{
|
||
int max_fd = get_max_fds ();
|
||
int fd, i, except_start;
|
||
|
||
if (except)
|
||
{
|
||
except_start = 0;
|
||
for (fd=first; fd < max_fd; fd++)
|
||
{
|
||
for (i=except_start; except[i] != -1; i++)
|
||
{
|
||
if (except[i] == fd)
|
||
{
|
||
/* If we found the descriptor in the exception list
|
||
we can start the next compare run at the next
|
||
index because the exception list is ordered. */
|
||
except_start = i + 1;
|
||
break;
|
||
}
|
||
}
|
||
if (except[i] == -1)
|
||
close (fd);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
for (fd=first; fd < max_fd; fd++)
|
||
close (fd);
|
||
}
|
||
|
||
gpg_err_set_errno (0);
|
||
}
|
||
|
||
|
||
/* Returns an array with all currently open file descriptors. The end
|
||
of the array is marked by -1. The caller needs to release this
|
||
array using the *standard free* and not with xfree. This allow the
|
||
use of this function right at startup even before libgcrypt has
|
||
been initialized. Returns NULL on error and sets ERRNO
|
||
accordingly. */
|
||
int *
|
||
get_all_open_fds (void)
|
||
{
|
||
int *array;
|
||
size_t narray;
|
||
int fd, max_fd, idx;
|
||
#ifndef HAVE_STAT
|
||
array = calloc (1, sizeof *array);
|
||
if (array)
|
||
array[0] = -1;
|
||
#else /*HAVE_STAT*/
|
||
struct stat statbuf;
|
||
|
||
max_fd = get_max_fds ();
|
||
narray = 32; /* If you change this change also t-exechelp.c. */
|
||
array = calloc (narray, sizeof *array);
|
||
if (!array)
|
||
return NULL;
|
||
|
||
/* Note: The list we return is ordered. */
|
||
for (idx=0, fd=0; fd < max_fd; fd++)
|
||
if (!(fstat (fd, &statbuf) == -1 && errno == EBADF))
|
||
{
|
||
if (idx+1 >= narray)
|
||
{
|
||
int *tmp;
|
||
|
||
narray += (narray < 256)? 32:256;
|
||
tmp = realloc (array, narray * sizeof *array);
|
||
if (!tmp)
|
||
{
|
||
free (array);
|
||
return NULL;
|
||
}
|
||
array = tmp;
|
||
}
|
||
array[idx++] = fd;
|
||
}
|
||
array[idx] = -1;
|
||
#endif /*HAVE_STAT*/
|
||
return array;
|
||
}
|
||
|
||
|
||
/* The exec core used right after the fork. This will never return. */
|
||
static void
|
||
do_exec (const char *pgmname, const char *argv[],
|
||
int fd_in, int fd_out, int fd_err,
|
||
int *except, void (*preexec)(void) )
|
||
{
|
||
char **arg_list;
|
||
int i, j;
|
||
int fds[3];
|
||
|
||
fds[0] = fd_in;
|
||
fds[1] = fd_out;
|
||
fds[2] = fd_err;
|
||
|
||
/* Create the command line argument array. */
|
||
i = 0;
|
||
if (argv)
|
||
while (argv[i])
|
||
i++;
|
||
arg_list = xcalloc (i+2, sizeof *arg_list);
|
||
arg_list[0] = strrchr (pgmname, '/');
|
||
if (arg_list[0])
|
||
arg_list[0]++;
|
||
else
|
||
arg_list[0] = xstrdup (pgmname);
|
||
if (argv)
|
||
for (i=0,j=1; argv[i]; i++, j++)
|
||
arg_list[j] = (char*)argv[i];
|
||
|
||
/* Assign /dev/null to unused FDs. */
|
||
for (i=0; i <= 2; i++)
|
||
{
|
||
if (fds[i] == -1 )
|
||
{
|
||
fds[i] = open ("/dev/null", i? O_WRONLY : O_RDONLY);
|
||
if (fds[i] == -1)
|
||
log_fatal ("failed to open '%s': %s\n",
|
||
"/dev/null", strerror (errno));
|
||
}
|
||
}
|
||
|
||
/* Connect the standard files. */
|
||
for (i=0; i <= 2; i++)
|
||
{
|
||
if (fds[i] != i && dup2 (fds[i], i) == -1)
|
||
log_fatal ("dup2 std%s failed: %s\n",
|
||
i==0?"in":i==1?"out":"err", strerror (errno));
|
||
}
|
||
|
||
/* Close all other files. */
|
||
close_all_fds (3, except);
|
||
|
||
if (preexec)
|
||
preexec ();
|
||
execv (pgmname, arg_list);
|
||
/* No way to print anything, as we have closed all streams. */
|
||
_exit (127);
|
||
}
|
||
|
||
|
||
static gpg_error_t
|
||
do_create_pipe (int filedes[2])
|
||
{
|
||
gpg_error_t err = 0;
|
||
|
||
if (pipe (filedes) == -1)
|
||
{
|
||
err = my_error_from_syserror ();
|
||
filedes[0] = filedes[1] = -1;
|
||
}
|
||
|
||
return err;
|
||
}
|
||
|
||
|
||
static gpg_error_t
|
||
create_pipe_and_estream (int filedes[2], estream_t *r_fp,
|
||
int outbound, int nonblock)
|
||
{
|
||
gpg_error_t err;
|
||
|
||
if (pipe (filedes) == -1)
|
||
{
|
||
err = my_error_from_syserror ();
|
||
log_error (_("error creating a pipe: %s\n"), gpg_strerror (err));
|
||
filedes[0] = filedes[1] = -1;
|
||
*r_fp = NULL;
|
||
return err;
|
||
}
|
||
|
||
if (!outbound)
|
||
*r_fp = es_fdopen (filedes[0], nonblock? "r,nonblock" : "r");
|
||
else
|
||
*r_fp = es_fdopen (filedes[1], nonblock? "w,nonblock" : "w");
|
||
if (!*r_fp)
|
||
{
|
||
err = my_error_from_syserror ();
|
||
log_error (_("error creating a stream for a pipe: %s\n"),
|
||
gpg_strerror (err));
|
||
close (filedes[0]);
|
||
close (filedes[1]);
|
||
filedes[0] = filedes[1] = -1;
|
||
return err;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Portable function to create a pipe. Under Windows the write end is
|
||
inheritable. If R_FP is not NULL, an estream is created for the
|
||
read end and stored at R_FP. */
|
||
gpg_error_t
|
||
gnupg_create_inbound_pipe (int filedes[2], estream_t *r_fp, int nonblock)
|
||
{
|
||
if (r_fp)
|
||
return create_pipe_and_estream (filedes, r_fp, 0, nonblock);
|
||
else
|
||
return do_create_pipe (filedes);
|
||
}
|
||
|
||
|
||
/* Portable function to create a pipe. Under Windows the read end is
|
||
inheritable. If R_FP is not NULL, an estream is created for the
|
||
write end and stored at R_FP. */
|
||
gpg_error_t
|
||
gnupg_create_outbound_pipe (int filedes[2], estream_t *r_fp, int nonblock)
|
||
{
|
||
if (r_fp)
|
||
return create_pipe_and_estream (filedes, r_fp, 1, nonblock);
|
||
else
|
||
return do_create_pipe (filedes);
|
||
}
|
||
|
||
|
||
/* Portable function to create a pipe. Under Windows both ends are
|
||
inheritable. */
|
||
gpg_error_t
|
||
gnupg_create_pipe (int filedes[2])
|
||
{
|
||
return do_create_pipe (filedes);
|
||
}
|
||
|
||
|
||
/* Fork and exec the PGMNAME, see exechelp.h for details. */
|
||
gpg_error_t
|
||
gnupg_spawn_process (const char *pgmname, const char *argv[],
|
||
int *except, void (*preexec)(void), unsigned int flags,
|
||
estream_t *r_infp,
|
||
estream_t *r_outfp,
|
||
estream_t *r_errfp,
|
||
pid_t *pid)
|
||
{
|
||
gpg_error_t err;
|
||
int inpipe[2] = {-1, -1};
|
||
int outpipe[2] = {-1, -1};
|
||
int errpipe[2] = {-1, -1};
|
||
estream_t infp = NULL;
|
||
estream_t outfp = NULL;
|
||
estream_t errfp = NULL;
|
||
int nonblock = !!(flags & GNUPG_SPAWN_NONBLOCK);
|
||
|
||
if (r_infp)
|
||
*r_infp = NULL;
|
||
if (r_outfp)
|
||
*r_outfp = NULL;
|
||
if (r_errfp)
|
||
*r_errfp = NULL;
|
||
*pid = (pid_t)(-1); /* Always required. */
|
||
|
||
if (r_infp)
|
||
{
|
||
err = create_pipe_and_estream (inpipe, &infp, 1, nonblock);
|
||
if (err)
|
||
return err;
|
||
}
|
||
|
||
if (r_outfp)
|
||
{
|
||
err = create_pipe_and_estream (outpipe, &outfp, 0, nonblock);
|
||
if (err)
|
||
{
|
||
if (infp)
|
||
es_fclose (infp);
|
||
else if (inpipe[1] != -1)
|
||
close (inpipe[1]);
|
||
if (inpipe[0] != -1)
|
||
close (inpipe[0]);
|
||
|
||
return err;
|
||
}
|
||
}
|
||
|
||
if (r_errfp)
|
||
{
|
||
err = create_pipe_and_estream (errpipe, &errfp, 0, nonblock);
|
||
if (err)
|
||
{
|
||
if (infp)
|
||
es_fclose (infp);
|
||
else if (inpipe[1] != -1)
|
||
close (inpipe[1]);
|
||
if (inpipe[0] != -1)
|
||
close (inpipe[0]);
|
||
|
||
if (outfp)
|
||
es_fclose (outfp);
|
||
else if (outpipe[0] != -1)
|
||
close (outpipe[0]);
|
||
if (outpipe[1] != -1)
|
||
close (outpipe[1]);
|
||
|
||
return err;
|
||
}
|
||
}
|
||
|
||
|
||
*pid = fork ();
|
||
if (*pid == (pid_t)(-1))
|
||
{
|
||
err = my_error_from_syserror ();
|
||
log_error (_("error forking process: %s\n"), gpg_strerror (err));
|
||
|
||
if (infp)
|
||
es_fclose (infp);
|
||
else if (inpipe[1] != -1)
|
||
close (inpipe[1]);
|
||
if (inpipe[0] != -1)
|
||
close (inpipe[0]);
|
||
|
||
if (outfp)
|
||
es_fclose (outfp);
|
||
else if (outpipe[0] != -1)
|
||
close (outpipe[0]);
|
||
if (outpipe[1] != -1)
|
||
close (outpipe[1]);
|
||
|
||
if (errfp)
|
||
es_fclose (errfp);
|
||
else if (errpipe[0] != -1)
|
||
close (errpipe[0]);
|
||
if (errpipe[1] != -1)
|
||
close (errpipe[1]);
|
||
return err;
|
||
}
|
||
|
||
if (!*pid)
|
||
{
|
||
/* This is the child. */
|
||
gcry_control (GCRYCTL_TERM_SECMEM);
|
||
es_fclose (infp);
|
||
es_fclose (outfp);
|
||
es_fclose (errfp);
|
||
do_exec (pgmname, argv, inpipe[0], outpipe[1], errpipe[1],
|
||
except, preexec);
|
||
/*NOTREACHED*/
|
||
}
|
||
|
||
/* This is the parent. */
|
||
if (inpipe[0] != -1)
|
||
close (inpipe[0]);
|
||
if (outpipe[1] != -1)
|
||
close (outpipe[1]);
|
||
if (errpipe[1] != -1)
|
||
close (errpipe[1]);
|
||
|
||
if (r_infp)
|
||
*r_infp = infp;
|
||
if (r_outfp)
|
||
*r_outfp = outfp;
|
||
if (r_errfp)
|
||
*r_errfp = errfp;
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
/* Simplified version of gnupg_spawn_process. This function forks and
|
||
then execs PGMNAME, while connecting INFD to stdin, OUTFD to stdout
|
||
and ERRFD to stderr (any of them may be -1 to connect them to
|
||
/dev/null). The arguments for the process are expected in the NULL
|
||
terminated array ARGV. The program name itself should not be
|
||
included there. Calling gnupg_wait_process is required.
|
||
|
||
Returns 0 on success or an error code. */
|
||
gpg_error_t
|
||
gnupg_spawn_process_fd (const char *pgmname, const char *argv[],
|
||
int infd, int outfd, int errfd, pid_t *pid)
|
||
{
|
||
gpg_error_t err;
|
||
|
||
*pid = fork ();
|
||
if (*pid == (pid_t)(-1))
|
||
{
|
||
err = my_error_from_syserror ();
|
||
log_error (_("error forking process: %s\n"), strerror (errno));
|
||
return err;
|
||
}
|
||
|
||
if (!*pid)
|
||
{
|
||
gcry_control (GCRYCTL_TERM_SECMEM);
|
||
/* Run child. */
|
||
do_exec (pgmname, argv, infd, outfd, errfd, NULL, NULL);
|
||
/*NOTREACHED*/
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
|
||
/* Waiting for child processes.
|
||
|
||
waitpid(2) may return information about terminated children that we
|
||
did not yet request, and there is no portable way to wait for a
|
||
specific set of children.
|
||
|
||
As a workaround, we store the results of children for later use.
|
||
|
||
XXX: This assumes that PIDs are not reused too quickly. */
|
||
|
||
struct terminated_child
|
||
{
|
||
pid_t pid;
|
||
int exitcode;
|
||
struct terminated_child *next;
|
||
};
|
||
|
||
struct terminated_child *terminated_children;
|
||
|
||
|
||
static gpg_error_t
|
||
store_result (pid_t pid, int exitcode)
|
||
{
|
||
struct terminated_child *c;
|
||
|
||
c = xmalloc (sizeof *c);
|
||
if (c == NULL)
|
||
return gpg_err_code_from_syserror ();
|
||
|
||
c->pid = pid;
|
||
c->exitcode = exitcode;
|
||
c->next = terminated_children;
|
||
terminated_children = c;
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
static int
|
||
get_result (pid_t pid, int *r_exitcode)
|
||
{
|
||
struct terminated_child *c, **prevp;
|
||
|
||
for (prevp = &terminated_children, c = terminated_children;
|
||
c;
|
||
prevp = &c->next, c = c->next)
|
||
if (c->pid == pid)
|
||
{
|
||
*prevp = c->next;
|
||
*r_exitcode = c->exitcode;
|
||
xfree (c);
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* See exechelp.h for a description. */
|
||
gpg_error_t
|
||
gnupg_wait_process (const char *pgmname, pid_t pid, int hang, int *r_exitcode)
|
||
{
|
||
return gnupg_wait_processes (&pgmname, &pid, 1, hang, r_exitcode);
|
||
}
|
||
|
||
/* See exechelp.h for a description. */
|
||
gpg_error_t
|
||
gnupg_wait_processes (const char **pgmnames, pid_t *pids, size_t count,
|
||
int hang, int *r_exitcodes)
|
||
{
|
||
gpg_err_code_t ec = 0;
|
||
size_t i, left;
|
||
int *dummy = NULL;
|
||
|
||
if (r_exitcodes == NULL)
|
||
dummy = r_exitcodes = xmalloc (sizeof *r_exitcodes * count);
|
||
|
||
for (i = 0, left = count; i < count; i++)
|
||
{
|
||
int status = -1;
|
||
|
||
if (pids[i] == (pid_t)(-1))
|
||
return my_error (GPG_ERR_INV_VALUE);
|
||
|
||
/* See if there was a previously stored result for this pid. */
|
||
if (get_result (pids[i], &status))
|
||
left -= 1;
|
||
|
||
r_exitcodes[i] = status;
|
||
}
|
||
|
||
while (left > 0)
|
||
{
|
||
pid_t pid;
|
||
int status;
|
||
|
||
#ifdef USE_NPTH
|
||
pid = npth_waitpid (-1, &status, hang ? 0 : WNOHANG);
|
||
#else
|
||
while ((pid = waitpid (-1, &status, hang ? 0 : WNOHANG)) == (pid_t)(-1)
|
||
&& errno == EINTR);
|
||
#endif
|
||
|
||
if (pid == (pid_t)(-1))
|
||
{
|
||
ec = gpg_err_code_from_errno (errno);
|
||
log_error (_("waiting for processes to terminate failed: %s\n"),
|
||
strerror (errno));
|
||
break;
|
||
}
|
||
else if (!pid)
|
||
{
|
||
ec = GPG_ERR_TIMEOUT; /* Still running. */
|
||
break;
|
||
}
|
||
else
|
||
{
|
||
for (i = 0; i < count; i++)
|
||
if (pid == pids[i])
|
||
break;
|
||
|
||
if (i == count)
|
||
{
|
||
/* No match, store this result. */
|
||
ec = store_result (pid, status);
|
||
if (ec)
|
||
break;
|
||
continue;
|
||
}
|
||
|
||
/* Process PIDS[i] died. */
|
||
if (r_exitcodes[i] != (pid_t) -1)
|
||
{
|
||
log_error ("PID %d was reused", pid);
|
||
ec = GPG_ERR_GENERAL;
|
||
break;
|
||
}
|
||
|
||
left -= 1;
|
||
r_exitcodes[i] = status;
|
||
}
|
||
}
|
||
|
||
if (ec == 0)
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
if (WIFEXITED (r_exitcodes[i]) && WEXITSTATUS (r_exitcodes[i]) == 127)
|
||
{
|
||
log_error (_("error running '%s': probably not installed\n"),
|
||
pgmnames[i]);
|
||
ec = GPG_ERR_CONFIGURATION;
|
||
}
|
||
else if (WIFEXITED (r_exitcodes[i]) && WEXITSTATUS (r_exitcodes[i]))
|
||
{
|
||
if (dummy)
|
||
log_error (_("error running '%s': exit status %d\n"),
|
||
pgmnames[i], WEXITSTATUS (r_exitcodes[i]));
|
||
else
|
||
r_exitcodes[i] = WEXITSTATUS (r_exitcodes[i]);
|
||
ec = GPG_ERR_GENERAL;
|
||
}
|
||
else if (!WIFEXITED (r_exitcodes[i]))
|
||
{
|
||
log_error (_("error running '%s': terminated\n"), pgmnames[i]);
|
||
ec = GPG_ERR_GENERAL;
|
||
}
|
||
}
|
||
|
||
xfree (dummy);
|
||
return gpg_err_make (GPG_ERR_SOURCE_DEFAULT, ec);
|
||
}
|
||
|
||
|
||
|
||
void
|
||
gnupg_release_process (pid_t pid)
|
||
{
|
||
(void)pid;
|
||
}
|
||
|
||
|
||
/* Spawn a new process and immediately detach from it. The name of
|
||
the program to exec is PGMNAME and its arguments are in ARGV (the
|
||
programname is automatically passed as first argument).
|
||
Environment strings in ENVP are set. An error is returned if
|
||
pgmname is not executable; to make this work it is necessary to
|
||
provide an absolute file name. All standard file descriptors are
|
||
connected to /dev/null. */
|
||
gpg_error_t
|
||
gnupg_spawn_process_detached (const char *pgmname, const char *argv[],
|
||
const char *envp[] )
|
||
{
|
||
pid_t pid;
|
||
int i;
|
||
|
||
if (getuid() != geteuid())
|
||
return my_error (GPG_ERR_BUG);
|
||
|
||
if (access (pgmname, X_OK))
|
||
return my_error_from_syserror ();
|
||
|
||
pid = fork ();
|
||
if (pid == (pid_t)(-1))
|
||
{
|
||
log_error (_("error forking process: %s\n"), strerror (errno));
|
||
return my_error_from_syserror ();
|
||
}
|
||
if (!pid)
|
||
{
|
||
pid_t pid2;
|
||
|
||
gcry_control (GCRYCTL_TERM_SECMEM);
|
||
if (setsid() == -1 || chdir ("/"))
|
||
_exit (1);
|
||
|
||
pid2 = fork (); /* Double fork to let init take over the new child. */
|
||
if (pid2 == (pid_t)(-1))
|
||
_exit (1);
|
||
if (pid2)
|
||
_exit (0); /* Let the parent exit immediately. */
|
||
|
||
if (envp)
|
||
for (i=0; envp[i]; i++)
|
||
putenv (xstrdup (envp[i]));
|
||
|
||
do_exec (pgmname, argv, -1, -1, -1, NULL, NULL);
|
||
|
||
/*NOTREACHED*/
|
||
}
|
||
|
||
if (waitpid (pid, NULL, 0) == -1)
|
||
log_error ("waitpid failed in gnupg_spawn_process_detached: %s",
|
||
strerror (errno));
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Kill a process; that is send an appropriate signal to the process.
|
||
gnupg_wait_process must be called to actually remove the process
|
||
from the system. An invalid PID is ignored. */
|
||
void
|
||
gnupg_kill_process (pid_t pid)
|
||
{
|
||
if (pid != (pid_t)(-1))
|
||
{
|
||
kill (pid, SIGTERM);
|
||
}
|
||
}
|