int zconfig_save (zconfig_t *self, const char *filename) { assert (self); int rc = 0; if (streq (filename, "-")) // "-" means write to stdout rc = zconfig_execute (self, s_config_save, stdout); else { FILE *file; file = fopen (filename, "w"); if (file) { rc = zconfig_execute (self, s_config_save, file); fflush (file); fclose (file); // If we saved back to original file, restat it so that // the file does not appear as "changed" if (self->file && streq (filename, zconfig_filename (self))) zfile_restat (self->file); } else rc = -1; // File not writeable } return rc; }
zfile_t * zfile_new (const char *path, const char *name) { zfile_t *self = (zfile_t *) zmalloc (sizeof (zfile_t)); // Format full path to file if (path) { self->fullname = (char *) zmalloc (strlen (path) + strlen (name) + 2); sprintf (self->fullname, "%s/%s", path, name); } else self->fullname = strdup (name); // Resolve symbolic link if possible if (strlen (self->fullname) > 3 && streq (self->fullname + strlen (self->fullname) - 3, ".ln")) { FILE *handle = fopen (self->fullname, "r"); if (handle) { char buffer [256]; if (fgets (buffer, 256, handle)) { // We have the contents of the symbolic link if (buffer [strlen (buffer) - 1] == '\n') buffer [strlen (buffer) - 1] = 0; self->link = strdup (buffer); // Chop ".ln" off name for external use self->fullname [strlen (self->fullname) - 3] = 0; } fclose (handle); } } zfile_restat (self); return self; }
void zfile_close (zfile_t *self) { assert (self); if (self->handle) { fclose (self->handle); zfile_restat (self); } self->handle = 0; }
zfile_t * zfile_tmp (void) { zfile_t *self = NULL; #if defined (__WINDOWS__) // adapted from MSDN: https://msdn.microsoft.com/en-us/library/windows/desktop/aa363875(v=vs.85).aspx DWORD dwRetVal = 0; UINT uRetVal = 0; TCHAR lpTempPathBuffer[MAX_PATH]; TCHAR szTempFileName[MAX_PATH]; // Gets the temp path env string (no guarantee it's a valid path). dwRetVal = GetTempPath(MAX_PATH, // length of the buffer lpTempPathBuffer); // buffer for path if (dwRetVal > MAX_PATH || (dwRetVal == 0)) return NULL; uRetVal = GetTempFileName(lpTempPathBuffer, // directory for tmp files TEXT("CZMQ_ZFILE"), // temp file name prefix 0, // create unique name szTempFileName); // buffer for name if (uRetVal == 0) return NULL; self = (zfile_t *) zmalloc (sizeof (zfile_t)); assert (self); self->fullname = strdup ((char*)szTempFileName); self->handle = fopen (self->fullname, "w"); #else char buffer [PATH_MAX]; strcpy (buffer, "/tmp/czmq_zfile.XXXXXX"); int fd = mkstemp (buffer); if (fd == -1) return NULL; self = (zfile_t *) zmalloc (sizeof (zfile_t)); assert (self); self->fd = fd; self->close_fd = true; self->fullname = strdup (buffer); self->handle = fdopen (self->fd, "w"); #endif if (!self->handle) { if (self->close_fd) close (self->fd); zstr_free (&self->fullname); free (self); return NULL; } self->remove_on_destroy = true; zfile_restat (self); return self; }
void zfile_close (zfile_t *self) { assert (self); if (self->handle) { fclose (self->handle); zfile_restat (self); self->handle = 0; self->eof = false; } }
static bool config_file_has_changed() { bool changed = false; if (config_file_exists) { zfile_restat(config_file); if (config_file_last_modified != zfile_modified(config_file)) { const char *new_digest = zfile_digest(config_file); // printf("[D] old digest: %s\n[D] new digest: %s\n", config_file_digest, new_digest); changed = strcmp(config_file_digest, new_digest) != 0; } } return changed; }
JNIEXPORT void JNICALL Java_org_zeromq_czmq_Zfile__1_1restat (JNIEnv *env, jclass c, jlong self) { zfile_restat ((zfile_t *) (intptr_t) self); }
void zfile_test (bool verbose) { printf (" * zfile: "); // @selftest zfile_t *file = zfile_new (NULL, "bilbo"); assert (streq (zfile_filename (file, "."), "bilbo")); assert (zfile_is_readable (file) == false); zfile_destroy (&file); // Create a test file in some random subdirectory file = zfile_new ("./this/is/a/test", "bilbo"); int rc = zfile_output (file); assert (rc == 0); zchunk_t *chunk = zchunk_new (NULL, 100); zchunk_fill (chunk, 0, 100); // Write 100 bytes at position 1,000,000 in the file rc = zfile_write (file, chunk, 1000000); assert (rc == 0); zchunk_destroy (&chunk); zfile_close (file); assert (zfile_is_readable (file)); assert (zfile_cursize (file) == 1000100); assert (!zfile_is_stable (file)); // Now append one byte to file from outside int handle = open ("./this/is/a/test/bilbo", O_WRONLY | O_TRUNC | O_BINARY, 0); assert (handle >= 0); rc = write (handle, "Hello, World\n", 13); assert (rc == 13); close (handle); assert (zfile_has_changed (file)); zclock_sleep (1001); assert (zfile_has_changed (file)); assert (!zfile_is_stable (file)); zfile_restat (file); assert (zfile_is_stable (file)); assert (streq (zfile_digest (file), "4AB299C8AD6ED14F31923DD94F8B5F5CB89DFB54")); // Check we can read from file rc = zfile_input (file); assert (rc == 0); chunk = zfile_read (file, 1000100, 0); assert (chunk); assert (zchunk_size (chunk) == 13); zchunk_destroy (&chunk); zfile_close (file); // Try some fun with symbolic links zfile_t *link = zfile_new ("./this/is/a/test", "bilbo.ln"); rc = zfile_output (link); assert (rc == 0); fprintf (zfile_handle (link), "./this/is/a/test/bilbo\n"); zfile_destroy (&link); link = zfile_new ("./this/is/a/test", "bilbo.ln"); rc = zfile_input (link); assert (rc == 0); chunk = zfile_read (link, 1000100, 0); assert (chunk); assert (zchunk_size (chunk) == 13); zchunk_destroy (&chunk); zfile_destroy (&link); // Remove file and directory zdir_t *dir = zdir_new ("./this", NULL); assert (zdir_cursize (dir) == 26); zdir_remove (dir, true); assert (zdir_cursize (dir) == 0); zdir_destroy (&dir); // Check we can no longer read from file assert (zfile_is_readable (file)); zfile_restat (file); assert (!zfile_is_readable (file)); rc = zfile_input (file); assert (rc == -1); zfile_destroy (&file); // @end printf ("OK\n"); }
/// // Refresh file properties from disk; this is not done automatically // on access methods, otherwise it is not possible to compare directory // snapshots. void QZfile::restat () { zfile_restat (self); }
void zfile_test (bool verbose) { printf (" * zfile: "); // @selftest const char *SELFTEST_DIR_RW = "src/selftest-rw"; const char *testbasedir = "this"; const char *testsubdir = "is/a/test"; const char *testfile = "bilbo"; const char *testlink = "bilbo.ln"; char *basedirpath = NULL; // subdir in a test, under SELFTEST_DIR_RW char *dirpath = NULL; // subdir in a test, under basedirpath char *filepath = NULL; // pathname to testfile in a test, in dirpath char *linkpath = NULL; // pathname to testlink in a test, in dirpath basedirpath = zsys_sprintf ("%s/%s", SELFTEST_DIR_RW, testbasedir); assert (basedirpath); dirpath = zsys_sprintf ("%s/%s", basedirpath, testsubdir); assert (dirpath); filepath = zsys_sprintf ("%s/%s", dirpath, testfile); assert (filepath); linkpath = zsys_sprintf ("%s/%s", dirpath, testlink); assert (linkpath); // This subtest is specifically for NULL as current directory, so // no SELFTEST_DIR_RW here; testfile should have no slashes inside. // Normally tests clean up in zfile_destroy(), but if a selftest run // dies e.g. on assert(), workspace remains dirty. Better clean it up. if (zfile_exists (testfile) ) { if (verbose) zsys_debug ("zfile_test() has to remove ./%s that should not have been here", testfile); zfile_delete (testfile); } zfile_t *file = zfile_new (NULL, testfile); assert (file); assert (streq (zfile_filename (file, "."), testfile)); assert (zfile_is_readable (file) == false); zfile_destroy (&file); // Create a test file in some random subdirectory if (verbose) zsys_debug ("zfile_test() at timestamp %" PRIi64 ": " "Creating new zfile %s", zclock_time(), filepath ); if (zfile_exists (filepath) ) { if (verbose) zsys_debug ("zfile_test() has to remove %s that should not have been here", filepath); zfile_delete (filepath); } file = zfile_new (dirpath, testfile); assert (file); int rc = zfile_output (file); assert (rc == 0); zchunk_t *chunk = zchunk_new (NULL, 100); assert (chunk); zchunk_fill (chunk, 0, 100); // Write 100 bytes at position 1,000,000 in the file if (verbose) zsys_debug ("zfile_test() at timestamp %" PRIi64 ": " "Writing 100 bytes at position 1,000,000 in the file", zclock_time() ); rc = zfile_write (file, chunk, 1000000); if (verbose) zsys_debug ("zfile_test() at timestamp %" PRIi64 ": " "Wrote 100 bytes at position 1,000,000 in the file, result code %d", zclock_time(), rc ); assert (rc == 0); zchunk_destroy (&chunk); zfile_close (file); assert (zfile_is_readable (file)); assert (zfile_cursize (file) == 1000100); if (verbose) zsys_debug ("zfile_test() at timestamp %" PRIi64 ": " "Testing if file is NOT stable (is younger than 1 sec)", zclock_time() ); assert (!zfile_is_stable (file)); if (verbose) zsys_debug ("zfile_test() at timestamp %" PRIi64 ": " "Passed the lag-dependent tests", zclock_time() ); assert (zfile_digest (file)); // Now truncate file from outside int handle = open (filepath, O_WRONLY | O_TRUNC | O_BINARY, 0); assert (handle >= 0); rc = write (handle, "Hello, World\n", 13); assert (rc == 13); close (handle); assert (zfile_has_changed (file)); #ifdef CZMQ_BUILD_DRAFT_API zclock_sleep ((int)zsys_file_stable_age_msec() + 50); #else zclock_sleep (5050); #endif assert (zfile_has_changed (file)); assert (!zfile_is_stable (file)); zfile_restat (file); assert (zfile_is_stable (file)); assert (streq (zfile_digest (file), "4AB299C8AD6ED14F31923DD94F8B5F5CB89DFB54")); // Check we can read from file rc = zfile_input (file); assert (rc == 0); chunk = zfile_read (file, 1000100, 0); assert (chunk); assert (zchunk_size (chunk) == 13); zchunk_destroy (&chunk); zfile_close (file); // Check we can read lines from file rc = zfile_input (file); assert (rc == 0); const char *line = zfile_readln (file); assert (streq (line, "Hello, World")); line = zfile_readln (file); assert (line == NULL); zfile_close (file); // Try some fun with symbolic links zfile_t *link = zfile_new (dirpath, testlink); assert (link); rc = zfile_output (link); assert (rc == 0); fprintf (zfile_handle (link), "%s\n", filepath); zfile_destroy (&link); link = zfile_new (dirpath, testlink); assert (link); rc = zfile_input (link); assert (rc == 0); chunk = zfile_read (link, 1000100, 0); assert (chunk); assert (zchunk_size (chunk) == 13); zchunk_destroy (&chunk); zfile_destroy (&link); // Remove file and directory zdir_t *dir = zdir_new (basedirpath, NULL); assert (dir); assert (zdir_cursize (dir) == 26); zdir_remove (dir, true); assert (zdir_cursize (dir) == 0); zdir_destroy (&dir); // Check we can no longer read from file assert (zfile_is_readable (file)); zfile_restat (file); assert (!zfile_is_readable (file)); rc = zfile_input (file); assert (rc == -1); zfile_destroy (&file); // This set of tests is done, free the strings for reuse zstr_free (&basedirpath); zstr_free (&dirpath); zstr_free (&filepath); zstr_free (&linkpath); const char *eof_checkfile = "eof_checkfile"; filepath = zsys_sprintf ("%s/%s", SELFTEST_DIR_RW, eof_checkfile); assert (filepath); if (zfile_exists (filepath) ) { if (verbose) zsys_debug ("zfile_test() has to remove %s that should not have been here", filepath); zfile_delete (filepath); } zstr_free (&filepath); file = zfile_new (SELFTEST_DIR_RW, eof_checkfile); assert (file); // 1. Write something first rc = zfile_output (file); assert (rc == 0); chunk = zchunk_new ("123456789", 9); assert (chunk); rc = zfile_write (file, chunk, 0); assert (rc == 0); zchunk_destroy (&chunk); zfile_close (file); assert (zfile_cursize (file) == 9); // 2. Read the written something rc = zfile_input (file); assert (rc != -1); // try to read more bytes than there is in the file chunk = zfile_read (file, 1000, 0); assert (zfile_eof(file)); assert (zchunk_streq (chunk, "123456789")); zchunk_destroy (&chunk); // reading is ok chunk = zfile_read (file, 5, 0); assert (!zfile_eof(file)); assert (zchunk_streq (chunk, "12345")); zchunk_destroy (&chunk); // read from non zero offset until the end chunk = zfile_read (file, 5, 5); assert (zfile_eof(file)); assert (zchunk_streq (chunk, "6789")); zchunk_destroy (&chunk); zfile_remove (file); zfile_close (file); zfile_destroy (&file); #ifdef CZMQ_BUILD_DRAFT_API zfile_t *tempfile = zfile_tmp (); assert (tempfile); assert (zfile_filename (tempfile, NULL)); assert (zsys_file_exists (zfile_filename (tempfile, NULL))); zchunk_t *tchunk = zchunk_new ("HELLO", 6); assert (zfile_write (tempfile, tchunk, 0) == 0); zchunk_destroy (&tchunk); char *filename = strdup (zfile_filename (tempfile, NULL)); zfile_destroy (&tempfile); assert (!zsys_file_exists (filename)); zstr_free (&filename); #endif // CZMQ_BUILD_DRAFT_API #if defined (__WINDOWS__) zsys_shutdown(); #endif // @end printf ("OK\n"); }