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minix3/usr.sbin/mkproto/mkproto.c

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/* mkproto - make an mkfs prototype Author: Andrew Cagney */
/* Submitted by: cagney@chook.ua.oz (Andrew Cagney - aka Noid) */
#include <sys/types.h>
#include <sys/stat.h>
#include <minix/minlib.h>
#include <limits.h>
#include <dirent.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <assert.h>
#include <err.h>
/* The default values for the prototype file */
#define DEF_UID 2 /* bin */
#define DEF_GID 1 /* daemon group */
#define DEF_PROT 0555 /* a=re */
#define DEF_BLOCKS 360
#define DEF_INODES 63
#define DEF_INDENTSTR "\t"
#ifndef major
#define major(x) ( (x>>8) & 0377)
#define minor(x) (x & 0377)
#endif
/* Globals. */
int count, origlen, tabs;
int gid, uid, prot, same_uid, same_gid, same_prot, blocks, inodes;
int block_given, inode_given, dprot;
char *indentstr;
char *proto_file, *top;
FILE *outfile;
extern int optind;
extern char *optarg;
int main(int argc, char **argv);
void descend(char *dirname);
void display_attrib(const char *name, struct stat *st);
void usage(char *binname);
void open_outfile(void);
/* Returned by minix_readdir */
#define ME_MAXNAME 256
struct me_dirent {
char d_name[ME_MAXNAME];
};
struct me_dirent *minix_readdir(DIR *, int *n);
void minix_free_readdir(struct me_dirent *md, int n);
/* Compare dirent objects for order */
static int cmp_dirent(const void *d1, const void *d2)
{
struct me_dirent *dp1 = (struct me_dirent *) d1,
*dp2 = (struct me_dirent *) d2;
return strcmp(dp1->d_name, dp2->d_name);
}
/* Return array of me_dirents. */
struct me_dirent *minix_readdir(DIR *dirp, int *n)
{
struct dirent *rdp;
struct me_dirent *dp;
struct me_dirent *dirents = NULL;
int reserved_dirents = 0;
int entries = 0;
while((rdp = readdir(dirp)) != NULL) {
if(entries >= reserved_dirents) {
struct me_dirent *newdirents;
int newreserved = (2*(reserved_dirents+1));
if(!(newdirents = realloc(dirents, newreserved *
sizeof(*dirents)))) {
free(dirents);
return NULL;
}
dirents = newdirents;
reserved_dirents = newreserved;
}
assert(entries < reserved_dirents);
assert(strlen(rdp->d_name) < sizeof(dp->d_name));
dp = &dirents[entries];
memset(dp, 0, sizeof(*dp));
strcpy(dp->d_name, rdp->d_name);
entries++;
}
/* Assume directories contain at least "." and "..", and
* therefore the array exists.
*/
assert(entries > 0);
assert(dirents);
/* normalize (sort) them */
qsort(dirents, entries, sizeof(*dp), cmp_dirent);
/* Return no. of entries. */
*n = entries;
return dirents;
}
void minix_free_readdir(struct me_dirent *md, int n)
{
free(md);
}
int main(argc, argv)
int argc;
char *argv[];
{
char *dir = __UNCONST("");
struct stat st;
int op;
gid = DEF_GID;
uid = DEF_UID;
prot = DEF_PROT;
blocks = DEF_BLOCKS;
inodes = DEF_INODES;
indentstr = __UNCONST(DEF_INDENTSTR);
inode_given = 0;
block_given = 0;
top = 0;
same_uid = 0;
same_gid = 0;
same_prot = 0;
while ((op = getopt(argc, argv, "b:g:i:p:t:u:d:s")) != EOF) {
switch (op) {
case 'b':
blocks = atoi(optarg);
block_given = 1;
break;
case 'g':
gid = atoi(optarg);
if (gid == 0) usage(argv[0]);
same_gid = 0;
break;
case 'i':
inodes = atoi(optarg);
inode_given = 1;
break;
case 'p':
sscanf(optarg, "%o", &prot);
if (prot == 0) usage(argv[0]);
same_prot = 0;
break;
case 's':
same_prot = 1;
same_uid = 1;
same_gid = 1;
break;
case 't': top = optarg; break;
case 'u':
uid = atoi(optarg);
if (uid == 0) usage(argv[0]);
same_uid = 0;
break;
case 'd': indentstr = optarg; break;
default: /* Illegal options */
usage(argv[0]);
}
}
if (optind >= argc) {
usage(argv[0]);
} else {
dir = argv[optind];
optind++;
proto_file = argv[optind];
}
if (!top) top = dir;
open_outfile();
if (block_given && !inode_given) inodes = (blocks / 3) + 8;
if (!block_given && inode_given) usage(argv[0]);
count = 1;
tabs = 0;
origlen = strlen(dir);
/* Check that it really is a directory */
stat(dir, &st);
if ((st.st_mode & S_IFMT) != S_IFDIR) {
fprintf(stderr, "mkproto: %s must be a directory\n", dir);
usage(argv[0]);
}
fprintf(outfile, "boot\n%d %d\n", blocks, inodes);
display_attrib("", &st);
fprintf(outfile, "\n");
descend(dir);
fprintf(outfile, "$\n");
return(0);
}
/* Output the prototype spec for this directory. */
void descend(dirname)
char *dirname;
{
struct me_dirent *dirents;
DIR *dirp;
char *name, *temp, *tempend;
int i;
struct stat st;
mode_t mode;
int entries = 0, orig_entries;
struct me_dirent *dp;
dirp = opendir(dirname);
if (dirp == NULL) {
fprintf(stderr, "unable to open directory %s\n", dirname);
return;
}
tabs++;
temp = (char *) malloc(sizeof(char) * strlen(dirname) +1 + PATH_MAX);
strcpy(temp, dirname);
strcat(temp, "/");
tempend = &temp[strlen(temp)];
/* read all directory entries */
if(!(dirents = minix_readdir(dirp, &entries)))
errx(1, "minix_readdir failed");
orig_entries = entries;
closedir(dirp);
for (dp = dirents; entries > 0; dp++, entries--) {
name = dp->d_name;
count++;
strcpy(tempend, name);
if (lstat(temp, &st) == -1) {
fprintf(stderr, "cant get status of '%s' \n", temp);
continue;
}
if (name[0] == '.' && (name[1] == 0 ||
(name[1] == '.' && name[2] == 0)))
continue;
display_attrib(name, &st);
mode = st.st_mode & S_IFMT;
if (mode == S_IFDIR) {
fprintf(outfile, "\n");
descend(temp);
for (i = 0; i < tabs; i++) {
fprintf(outfile, "%s", indentstr);
}
fprintf(outfile, "$\n");
continue;
}
if (mode == S_IFBLK || mode == S_IFCHR) {
fprintf(outfile, " %d %d\n", major(st.st_rdev), minor(st.st_rdev));
continue;
}
if (mode == S_IFREG) {
i = origlen;
fprintf(outfile, "%s%s", indentstr, top);
while (temp[i] != '\0') {
fputc(temp[i], outfile);
i++;
}
fprintf(outfile, "\n");
continue;
}
if (mode == S_IFLNK) {
char linkcontent[PATH_MAX];
memset(linkcontent, 0, sizeof(linkcontent));
if(readlink(temp, linkcontent, sizeof(linkcontent)) < 0) {
perror("readlink");
exit(1);
}
fprintf(outfile, "%s%s\n", indentstr, linkcontent);
continue;
}
fprintf(outfile, " /dev/null");
fprintf(stderr,"File\n\t%s\n has an invalid mode, made empty.\n",temp);
}
free(temp);
minix_free_readdir(dirents, orig_entries);
tabs--;
}
void display_attrib(name, st)
const char *name;
struct stat *st;
{
/* Output the specification for a single file */
int i;
if (same_uid) uid = st->st_uid;
if (same_gid) gid = st->st_gid;
if (same_prot)
prot = st->st_mode & 0777; /***** This one is a bit shady *****/
for (i = 0; i < tabs; i++) fprintf(outfile, "%s", indentstr);
fprintf(outfile, "%s%s%c%c%c%03o %d %d",
name,
*name == '\0' ? "" : indentstr, /* stop the tab for a null name */
(st->st_mode & S_IFMT) == S_IFDIR ? 'd' :
(st->st_mode & S_IFMT) == S_IFCHR ? 'c' :
(st->st_mode & S_IFMT) == S_IFBLK ? 'b' :
(st->st_mode & S_IFMT) == S_IFLNK ? 's' :
'-', /* file type */
(st->st_mode & S_ISUID) ? 'u' : '-', /* set uid */
(st->st_mode & S_ISGID) ? 'g' : '-', /* set gid */
prot,
uid,
gid);
}
void usage(binname)
char *binname;
{
fprintf(stderr, "Usage: %s [options] source_directory [prototype_file]\n", binname);
fprintf(stderr, "options:\n");
fprintf(stderr, " -b n\t\t file system size is n blocks (default %d)\n", DEF_BLOCKS);
fprintf(stderr, " -d STRING\t define the indentation characters (default %s)\n", "(none)");
fprintf(stderr, " -g n\t\t use n as the gid on all files (default %d)\n", DEF_GID);
fprintf(stderr, " -i n\t\t file system gets n i-nodes (default %d)\n", DEF_INODES);
fprintf(stderr, " -p nnn\t use nnn (octal) as mode on all files (default %o)\n", DEF_PROT);
fprintf(stderr, " -s \t\t use the same uid, gid and mode as originals have\n");
fprintf(stderr, " -t ROOT\t inital path prefix for each entry\n");
fprintf(stderr, " -u n\t\t use nnn as the uid on all files (default %d)\n", DEF_UID);
exit(1);
}
void open_outfile()
{
if (proto_file == NULL)
outfile = stdout;
else if ((outfile = fopen(proto_file, "w")) == NULL)
fprintf(stderr, "Cannot create %s\n ", proto_file);
}
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