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Diffstat (limited to 'common/t-exechelp.c')
| -rw-r--r-- | common/t-exechelp.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/common/t-exechelp.c b/common/t-exechelp.c new file mode 100644 index 0000000..cf967fc --- /dev/null +++ b/common/t-exechelp.c @@ -0,0 +1,188 @@ +/* t-exechelp.c - Module test for exechelp.c + * Copyright (C) 2009 Free Software Foundation, Inc. + * + * This file is part of GnuPG. + * + * GnuPG is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * GnuPG 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 <https://www.gnu.org/licenses/>. + */ + +#include <config.h> +#include <stdio.h> +#include <stdlib.h> +#include <errno.h> +#include <assert.h> +#include <unistd.h> + +#include "util.h" +#include "exechelp.h" + +static int verbose; + + +static void +print_open_fds (int *array) +{ + int n; + + if (!verbose) + return; + + for (n=0; array[n] != -1; n++) + ; + printf ("open file descriptors: %d", n); + putchar (' '); + putchar (' '); + putchar ('('); + for (n=0; array[n] != -1; n++) + printf ("%d%s", array[n], array[n+1] == -1?"":" "); + putchar (')'); + putchar ('\n'); +} + + +static int * +xget_all_open_fds (void) +{ + int *array; + + array = get_all_open_fds (); + if (!array) + { + fprintf (stderr, "%s:%d: get_all_open_fds failed: %s\n", + __FILE__, __LINE__, strerror (errno)); + exit (1); + } + return array; +} + + +/* That is a very crude test. To do a proper test we would need to + fork a test process and best return information by some other means + than file descriptors. */ +static void +test_close_all_fds (void) +{ + int max_fd = get_max_fds (); + int *array; + int fd; + int initial_count, count, n; +#if 0 + char buffer[100]; + + snprintf (buffer, sizeof buffer, "/bin/ls -l /proc/%d/fd", (int)getpid ()); + system (buffer); +#endif + + if (verbose) + printf ("max. file descriptors: %d\n", max_fd); + array = xget_all_open_fds (); + print_open_fds (array); + for (initial_count=n=0; array[n] != -1; n++) + initial_count++; + free (array); + + /* Some dups to get more file descriptors and close one. */ + dup (1); + dup (1); + fd = dup (1); + dup (1); + close (fd); + + array = xget_all_open_fds (); + if (verbose) + print_open_fds (array); + for (count=n=0; array[n] != -1; n++) + count++; + if (count != initial_count+3) + { + fprintf (stderr, "%s:%d: dup or close failed\n", + __FILE__, __LINE__); + exit (1); + } + free (array); + + /* Close the non standard ones. */ + close_all_fds (3, NULL); + + /* Get a list to check whether they are all closed. */ + array = xget_all_open_fds (); + if (verbose) + print_open_fds (array); + for (count=n=0; array[n] != -1; n++) + count++; + if (count > initial_count) + { + fprintf (stderr, "%s:%d: not all files were closed\n", + __FILE__, __LINE__); + exit (1); + } + initial_count = count; + free (array); + + /* Now let's check the realloc we use. We do this and the next + tests only if we are allowed to open enought descriptors. */ + if (get_max_fds () > 32) + { + int except[] = { 20, 23, 24, -1 }; + + for (n=initial_count; n < 31; n++) + dup (1); + array = xget_all_open_fds (); + if (verbose) + print_open_fds (array); + free (array); + for (n=0; n < 5; n++) + { + dup (1); + array = xget_all_open_fds (); + if (verbose) + print_open_fds (array); + free (array); + } + + /* Check whether the except list works. */ + close_all_fds (3, except); + array = xget_all_open_fds (); + if (verbose) + print_open_fds (array); + for (count=n=0; array[n] != -1; n++) + count++; + free (array); + + if (count != initial_count + DIM(except)-1) + { + fprintf (stderr, "%s:%d: close_all_fds failed\n", + __FILE__, __LINE__); + exit (1); + } + } + +} + + +int +main (int argc, char **argv) +{ + if (argc) + { argc--; argv++; } + if (argc && !strcmp (argv[0], "--verbose")) + { + verbose = 1; + argc--; argv++; + } + + test_close_all_fds (); + + return 0; +} |