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Diffstat (limited to 'rtems/mkrootfs.c')
| -rw-r--r-- | rtems/mkrootfs.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/rtems/mkrootfs.c b/rtems/mkrootfs.c new file mode 100644 index 0000000..9414eae --- /dev/null +++ b/rtems/mkrootfs.c @@ -0,0 +1,248 @@ +#include <machine/rtems-bsd-kernel-space.h> + +/* + ------------------------------------------------------------------------ + + Copyright Cybertec Pty Ltd, 2000 + All rights reserved Cybertec Pty Ltd, 2000 + + COPYRIGHT (c) 1989-1998. + On-Line Applications Research Corporation (OAR). + + The license and distribution terms for this file may be + found in the file LICENSE in this distribution or at + + http://www.rtems.org/license/LICENSE. + + This software with is provided ``as is'' and with NO WARRANTY. + + ------------------------------------------------------------------------ + + Set of helpers when creating a root file system. The root filesystem + in RTEMS is the In Memory Filesystem (IMFS). We could copy an exiting + filesystem to here, how-ever a number of files can have target + specific initialisation info which we need to write. + + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <errno.h> +#include <stdio.h> +#include <string.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <fcntl.h> +#include <unistd.h> +#include <sys/socket.h> +#include <netinet/in.h> + +#include <rtems/mkrootfs.h> +#include <rtems/libio.h> +#include <rtems/endian.h> + +/* + * A table a list of names and their modes. + */ + +typedef struct rtems_rootfs_dir_table +{ + const char *name; + mode_t mode; +} rtems_rootfs_dir_table; + +/* + * Table of directorys to make. + */ + +static const rtems_rootfs_dir_table default_directories[] = +{ + { "/bin", S_IFDIR | S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH }, + { "/etc", S_IFDIR | S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH }, + { "/dev", S_IFDIR | S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH }, + { "/usr/bin", S_IFDIR | S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH } +}; + +#define MKFILE_MODE (S_IRUSR | S_IWUSR | S_IWGRP | S_IRGRP | S_IROTH) +#define MKDIR_MODE (S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) + +/* + * Create enough files to support the networking stack. + * Points to a table of strings. + */ + +int +rtems_rootfs_file_append (const char *file, + mode_t omode, + const int line_cnt, + const char **lines) +{ + struct stat sb; + int fd; + int i; + + /* + * See is a file exists. If it does not, create the + * file and the path to the file. + */ + + fd = -1; + + if (stat(file, &sb)) + { + if (errno == ENOENT) + { + /* + * Get the path to the file if one exists and create the + * path. If it exists nothing happens. + */ + + size_t i = strlen (file); + + while (i) + { + if (file[i] == '/') + { + char path[128]; + + if (i >= sizeof path) + { + printf ("root fs, path too long `%s'\n", file); + return -1; + } + + strncpy (path, file, i); + path[i] = '\0'; + + if (rtems_mkdir (path, MKDIR_MODE)) + return -1; + break; + } + i--; + } + + if ((fd = open (file, O_CREAT | O_APPEND | O_WRONLY, omode)) < 0) + { + printf ("root fs, cannot create file `%s' : %s\n", + file, strerror (errno)); + return -1; + } + } + } + + if (fd < 0) + { + if ((fd = open (file, O_APPEND | O_WRONLY)) < 0) + { + printf ("root fs, cannot open file `%s' : %s\n", + file, strerror (errno)); + return -1; + } + } + + for (i = 0; i < line_cnt; i++) + { + size_t len = strlen (lines[i]); + + if (len) + { + if (write (fd, lines[i], strlen (lines[i])) < 0) + { + close (fd); + printf ("root fs, cannot write to `%s' : %s\n", + file, strerror (errno)); + return -1; + } + } + } + + return close (fd); +} + +/* + * Write hosts record. + */ + +int +rtems_rootfs_append_host_rec (in_addr_t cip, + const char *cname, + const char *dname) +{ + char buf[128]; + char *bufp = buf; + const char *bufl[1]; + struct in_addr ip; + + ip.s_addr = cip; + + if (cname && strlen (cname)) + { + char addrbuf[INET_ADDRSTRLEN]; + + snprintf (bufp, sizeof (buf), "%s\t\t%s", inet_ntoa_r (ip, addrbuf), cname); + bufp += strlen (buf); + + if (dname && strlen (dname)) + { + snprintf (bufp, sizeof (buf), "\t\t%s.%s", cname, dname); + bufp += strlen (buf); + } + + strcat (buf, "\n"); + + bufl[0] = buf; + + if (rtems_rootfs_file_append ("/etc/hosts", MKFILE_MODE, 1, bufl) < 0) + return -1; + } + else + { + printf ("rootfs hosts rec append, no cname supplied\n"); + return -1; + } + + return 0; +} + +/* + * Create a root file system. + */ + +int +rtems_create_root_fs (void) +{ + const char *lines[1]; + size_t i; + + /* + * Create the directories. + */ + + for (i = 0; + i < (sizeof (default_directories) / sizeof (rtems_rootfs_dir_table)); + i++) + if (rtems_mkdir (default_directories[i].name, + default_directories[i].mode)) + return -1; + + /* + * The TCP/IP stack likes this one. If DNS does not work + * use the host file. + */ + + lines[0] = "hosts,bind\n"; + + if (rtems_rootfs_file_append ("/etc/host.conf", MKFILE_MODE, 1, lines)) + return -1; + + /* + * Create a `/etc/hosts' file. + */ + + if (rtems_rootfs_append_host_rec (htonl (0x7f000001), "localhost", "localdomain")) + return -1; + + return 0; +} |