archive_write_open_filename.c [plain text]
#include "archive_platform.h"
__FBSDID("$FreeBSD: src/lib/libarchive/archive_write_open_filename.c,v 1.20 2008/02/19 05:46:58 kientzle Exp $");
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "archive.h"
#ifndef O_BINARY
#define O_BINARY 0
#endif
struct write_file_data {
int fd;
char filename[1];
};
static int file_close(struct archive *, void *);
static int file_open(struct archive *, void *);
static ssize_t file_write(struct archive *, void *, const void *buff, size_t);
int
archive_write_open_file(struct archive *a, const char *filename)
{
return (archive_write_open_filename(a, filename));
}
int
archive_write_open_filename(struct archive *a, const char *filename)
{
struct write_file_data *mine;
if (filename == NULL || filename[0] == '\0') {
mine = (struct write_file_data *)malloc(sizeof(*mine));
if (mine == NULL) {
archive_set_error(a, ENOMEM, "No memory");
return (ARCHIVE_FATAL);
}
mine->filename[0] = '\0';
} else {
mine = (struct write_file_data *)malloc(sizeof(*mine) + strlen(filename));
if (mine == NULL) {
archive_set_error(a, ENOMEM, "No memory");
return (ARCHIVE_FATAL);
}
strcpy(mine->filename, filename);
}
mine->fd = -1;
return (archive_write_open(a, mine,
file_open, file_write, file_close));
}
static int
file_open(struct archive *a, void *client_data)
{
int flags;
struct write_file_data *mine;
struct stat st;
mine = (struct write_file_data *)client_data;
flags = O_WRONLY | O_CREAT | O_TRUNC | O_BINARY;
if (mine->filename[0] != '\0') {
mine->fd = open(mine->filename, flags, 0666);
if (mine->fd < 0) {
archive_set_error(a, errno, "Failed to open '%s'",
mine->filename);
return (ARCHIVE_FATAL);
}
} else {
mine->fd = 1;
if (archive_write_get_bytes_in_last_block(a) < 0)
archive_write_set_bytes_in_last_block(a, 0);
}
if (fstat(mine->fd, &st) != 0) {
archive_set_error(a, errno, "Couldn't stat '%s'",
mine->filename);
return (ARCHIVE_FATAL);
}
if (archive_write_get_bytes_in_last_block(a) < 0) {
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode) ||
S_ISFIFO(st.st_mode))
archive_write_set_bytes_in_last_block(a, 0);
else
archive_write_set_bytes_in_last_block(a, 1);
}
if (S_ISREG(st.st_mode))
archive_write_set_skip_file(a, st.st_dev, st.st_ino);
return (ARCHIVE_OK);
}
static ssize_t
file_write(struct archive *a, void *client_data, const void *buff, size_t length)
{
struct write_file_data *mine;
ssize_t bytesWritten;
mine = (struct write_file_data *)client_data;
bytesWritten = write(mine->fd, buff, length);
if (bytesWritten <= 0) {
archive_set_error(a, errno, "Write error");
return (-1);
}
return (bytesWritten);
}
static int
file_close(struct archive *a, void *client_data)
{
struct write_file_data *mine = (struct write_file_data *)client_data;
(void)a;
if (mine->filename[0] != '\0')
close(mine->fd);
free(mine);
return (ARCHIVE_OK);
}