#endif
#include "sfile.h"
#include "sformat.h"
+#include <sys/mman.h>
typedef struct BuildContext BuildContext;
typedef struct Instruction Instruction;
static Instruction *
build_instructions (const char *contents,
+ gsize length,
SFormat *format,
int *n_instructions,
GError **err)
parse_context = g_markup_parse_context_new (&parser, 0, &build, NULL);
- if (!g_markup_parse_context_parse (parse_context, contents, -1, err))
+ if (!g_markup_parse_context_parse (parse_context, contents, length, err))
{
free_instructions ((Instruction *)build.instructions->data, build.instructions->len);
return NULL;
gchar *contents;
gsize length;
SFileInput *input;
-
- if (!g_file_get_contents (filename, &contents, &length, err))
- return NULL;
+ GMappedFile *file;
+
+ file = g_mapped_file_new (filename, FALSE, err);
+ if (!file)
+ return NULL;
+
+ contents = g_mapped_file_get_contents (file);
+ length = g_mapped_file_get_length (file);
+
+ madvise (contents, length, MADV_SEQUENTIAL);
input = g_new (SFileInput, 1);
- input->instructions = build_instructions (contents, format, &input->n_instructions, err);
+ input->instructions = build_instructions (contents, length, format, &input->n_instructions, err);
if (!input->instructions)
{
g_free (input);
- g_free (contents);
+ g_mapped_file_free (file);
return NULL;
}
-
- g_free (contents);
+
+ g_mapped_file_free (file);
input->current_instruction = input->instructions;
input->instructions_by_location = g_hash_table_new (g_direct_hash, g_direct_equal);
g_string_append_c (output, '\n');
}
-static gboolean
-file_replace (const gchar *filename,
- const gchar *contents,
- gssize length,
- GError **error);
-
#if 0
static void
disaster (int status)
g_free (compressed);
#endif
- retval = file_replace (filename, output->str, - 1, err);
+ retval = g_file_set_contents (filename, output->str, output->len, err);
g_string_free (output, TRUE);
g_hash_table_destroy (sfile->objects);
g_free (sfile);
}
-
-
-
-
-
-
-
-
-
-
-
-
-
-/* A copy of g_file_replace() because I don't want to depend on
- * GLib HEAD
- */
-#include <errno.h>
-#include <sys/wait.h>
-#include <glib/gstdio.h>
-#include <unistd.h>
-
-static gboolean
-rename_file (const char *old_name,
- const char *new_name,
- GError **err)
-{
- errno = 0;
- if (g_rename (old_name, new_name) == -1)
- {
- int save_errno = errno;
- gchar *display_old_name = g_filename_display_name (old_name);
- gchar *display_new_name = g_filename_display_name (new_name);
-
- g_set_error (err,
- G_FILE_ERROR,
- g_file_error_from_errno (save_errno),
- "Failed to rename file '%s' to '%s': g_rename() failed: %s",
- display_old_name,
- display_new_name,
- g_strerror (save_errno));
-
- g_free (display_old_name);
- g_free (display_new_name);
-
- return FALSE;
- }
-
- return TRUE;
-}
-
-static gboolean
-set_umask_permissions (int fd,
- GError **err)
-{
-#ifdef G_OS_WIN32
-
- return TRUE;
-
-#else
-
- /* All of this function is just to work around the fact that
- * there is no way to get the umask without changing it.
- *
- * We can't just change-and-reset the umask because that would
- * lead to a race condition if another thread tried to change
- * the umask in between the getting and the setting of the umask.
- * So we have to do the whole thing in a child process.
- */
-
- pid_t pid = fork ();
-
- if (pid == -1)
- {
- g_set_error (err,
- G_FILE_ERROR,
- g_file_error_from_errno (errno),
- "Could not change file mode: fork() failed: %s",
- g_strerror (errno));
-
- return FALSE;
- }
- else if (pid == 0)
- {
- /* child */
- mode_t mask = umask (0666);
-
- errno = 0;
- if (fchmod (fd, 0666 & ~mask) == -1)
- _exit (errno);
- else
- _exit (0);
-
- return TRUE; /* To quiet gcc */
- }
- else
- {
- /* parent */
- int status;
-
- waitpid (pid, &status, 0);
-
- if (WIFEXITED (status))
- {
- int chmod_errno = WEXITSTATUS (status);
-
- if (chmod_errno == 0)
- {
- return TRUE;
- }
- else
- {
- g_set_error (err,
- G_FILE_ERROR,
- g_file_error_from_errno (chmod_errno),
- "Could not change file mode: chmod() failed: %s",
- g_strerror (chmod_errno));
-
- return FALSE;
- }
- }
- else if (WIFSIGNALED (status))
- {
- g_set_error (err,
- G_FILE_ERROR,
- G_FILE_ERROR_FAILED,
- "Could not change file mode: Child terminated by signal: %s",
- g_strsignal (WTERMSIG (status)));
-
- return FALSE;
- }
- else
- {
- /* This shouldn't happen */
- g_set_error (err,
- G_FILE_ERROR,
- G_FILE_ERROR_FAILED,
- "Could not change file mode: Child terminated abnormally");
- return FALSE;
- }
- }
-#endif
-}
-
-static gchar *
-write_to_temp_file (const gchar *contents,
- gssize length,
- const gchar *template,
- GError **err)
-{
- gchar *tmp_name;
- gchar *display_name;
- gchar *retval;
- FILE *file;
- gint fd;
- int save_errno;
-
- retval = NULL;
-
- tmp_name = g_strdup_printf ("%s.XXXXXX", template);
-
- errno = 0;
- fd = g_mkstemp (tmp_name);
- save_errno = errno;
- display_name = g_filename_display_name (tmp_name);
-
- if (fd == -1)
- {
- g_set_error (err,
- G_FILE_ERROR,
- g_file_error_from_errno (save_errno),
- "Failed to create file '%s': %s",
- display_name, g_strerror (save_errno));
-
- goto out;
- }
-
- if (!set_umask_permissions (fd, err))
- {
- close (fd);
- g_unlink (tmp_name);
-
- goto out;
- }
-
- errno = 0;
- file = fdopen (fd, "wb");
- if (!file)
- {
- g_set_error (err,
- G_FILE_ERROR,
- g_file_error_from_errno (errno),
- "Failed to open file '%s' for writing: fdopen() failed: %s",
- display_name,
- g_strerror (errno));
-
- close (fd);
- g_unlink (tmp_name);
-
- goto out;
- }
-
- if (length > 0)
- {
- size_t n_written;
-
- errno = 0;
-
- n_written = fwrite (contents, 1, length, file);
-
- if (n_written < length)
- {
- g_set_error (err,
- G_FILE_ERROR,
- g_file_error_from_errno (errno),
- "Failed to write file '%s': fwrite() failed: %s",
- display_name,
- g_strerror (errno));
-
- fclose (file);
- g_unlink (tmp_name);
-
- goto out;
- }
- }
-
- errno = 0;
- if (fclose (file) == EOF)
- {
- g_set_error (err,
- G_FILE_ERROR,
- g_file_error_from_errno (errno),
- "Failed to close file '%s': fclose() failed: %s",
- display_name,
- g_strerror (errno));
-
- g_unlink (tmp_name);
-
- goto out;
- }
-
- retval = g_strdup (tmp_name);
-
-out:
- g_free (tmp_name);
- g_free (display_name);
-
- return retval;
-}
-
-static gboolean
-file_replace (const gchar *filename,
- const gchar *contents,
- gssize length,
- GError **error)
-{
- gchar *tmp_filename;
- gboolean retval;
- GError *rename_error = NULL;
-
- g_return_val_if_fail (filename != NULL, FALSE);
- g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
- g_return_val_if_fail (contents != NULL || length == 0, FALSE);
- g_return_val_if_fail (length >= -1, FALSE);
-
- if (length == -1)
- length = strlen (contents);
-
- tmp_filename = write_to_temp_file (contents, length, filename, error);
-
- if (!tmp_filename)
- {
- retval = FALSE;
- goto out;
- }
-
- if (!rename_file (tmp_filename, filename, &rename_error))
- {
-#ifndef G_OS_WIN32
-
- g_unlink (tmp_filename);
- g_propagate_error (error, rename_error);
- retval = FALSE;
- goto out;
-
-#else /* G_OS_WIN32 */
-
- /* Renaming failed, but on Windows this may just mean
- * the file already exists. So if the target file
- * exists, try deleting it and do the rename again.
- */
- if (!g_file_test (filename, G_FILE_TEST_EXISTS))
- {
- g_unlink (tmp_filename);
- g_propagate_error (error, rename_error);
- retval = FALSE;
- goto out;
- }
-
- g_error_free (rename_error);
-
- if (g_unlink (filename) == -1)
- {
- gchar *display_filename = g_filename_display_name (filename);
-
- g_set_error (error,
- G_FILE_ERROR,
- g_file_error_from_errno (errno),
- "Existing file '%s' could not be removed: g_unlink() failed: %s",
- display_filename,
- g_strerror (errno));
-
- g_free (display_filename);
- g_unlink (tmp_filename);
- retval = FALSE;
- goto out;
- }
-
- if (!rename_file (tmp_filename, filename, error))
- {
- g_unlink (tmp_filename);
- retval = FALSE;
- goto out;
- }
-
-#endif
- }
-
- retval = TRUE;
-
-out:
- g_free (tmp_filename);
- return retval;
-}
-
projects / platform / upstream / sysprof.git / commitdiff