#include <sys/cdefs.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include <errno.h>
#include <fstab.h>
#include <err.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "ext.h"
#include "fsutil.h"
static const char *dev = NULL;
static int hot = 0;
extern char *__progname;
static void vmsg __P((int, const char *, va_list));
void
setcdevname(const char *cd)
{
dev = cd;
}
const char *
cdevname()
{
return dev;
}
int
hotroot()
{
return hot;
}
void
#if __STDC__
errexit(const char *fmt, ...)
#else
errexit(va_alist)
va_dcl
#endif
{
va_list ap;
#if __STDC__
va_start(ap, fmt);
#else
const char *fmt;
va_start(ap);
fmt = va_arg(ap, const char *);
#endif
(void) vfprintf(stderr, fmt, ap);
va_end(ap);
exit(8);
}
static void
vmsg(fatal, fmt, ap)
int fatal;
const char *fmt;
va_list ap;
{
if (!fatal && preen)
(void) printf("%s: ", dev);
if (!quiet)
(void) vprintf(fmt, ap);
if (fatal && preen)
(void) printf("\n");
if (fatal && preen) {
(void) printf(
"%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n",
dev, __progname);
exit(8);
}
}
void
#if __STDC__
pfatal(const char *fmt, ...)
#else
pfatal(va_alist)
va_dcl
#endif
{
va_list ap;
#if __STDC__
va_start(ap, fmt);
#else
const char *fmt;
va_start(ap);
fmt = va_arg(ap, const char *);
#endif
vmsg(1, fmt, ap);
va_end(ap);
}
void
#if __STDC__
pwarn(const char *fmt, ...)
#else
pwarn(va_alist)
va_dcl
#endif
{
va_list ap;
#if __STDC__
va_start(ap, fmt);
#else
const char *fmt;
va_start(ap);
fmt = va_arg(ap, const char *);
#endif
vmsg(0, fmt, ap);
va_end(ap);
}
#ifdef __APPLE__
__private_extern__
#endif
void
perr(s)
const char *s;
{
pfatal("%s (%s)\n", s, strerror(errno));
}
#ifdef __APPLE__
__private_extern__
#endif
void
#if __STDC__
panic(const char *fmt, ...)
#else
panic(va_alist)
va_dcl
#endif
{
va_list ap;
#if __STDC__
va_start(ap, fmt);
#else
const char *fmt;
va_start(ap);
fmt = va_arg(ap, const char *);
#endif
vmsg(1, fmt, ap);
va_end(ap);
exit(8);
}
const char *
unrawname(name)
const char *name;
{
static char unrawbuf[32];
const char *dp;
struct stat stb;
if ((dp = strrchr(name, '/')) == 0)
return (name);
if (stat(name, &stb) < 0)
return (name);
if (!S_ISCHR(stb.st_mode))
return (name);
if (dp[1] != 'r')
return (name);
(void)snprintf(unrawbuf, 32, "%.*s/%s", (int)(dp - name), name, dp + 2);
return (unrawbuf);
}
const char *
rawname(name)
const char *name;
{
static char rawbuf[32];
const char *dp;
if ((dp = strrchr(name, '/')) == 0)
return (0);
(void)snprintf(rawbuf, 32, "%.*s/r%s", (int)(dp - name), name, dp + 1);
return (rawbuf);
}
const char *
blockcheck(origname)
const char *origname;
{
struct stat stslash, stblock, stchar;
const char *newname, *raw;
struct fstab *fsp;
int retried = 0;
hot = 0;
if (stat("/", &stslash) < 0) {
perr("/");
printf("Can't stat root\n");
return (origname);
}
newname = origname;
retry:
if (stat(newname, &stblock) < 0) {
perr(newname);
printf("Can't stat %s\n", newname);
return (origname);
}
if (S_ISBLK(stblock.st_mode)) {
if (stslash.st_dev == stblock.st_rdev)
hot++;
raw = rawname(newname);
if (stat(raw, &stchar) < 0) {
perr(raw);
printf("Can't stat %s\n", raw);
return (origname);
}
if (S_ISCHR(stchar.st_mode)) {
return (raw);
} else {
printf("%s is not a character device\n", raw);
return (origname);
}
} else if (S_ISCHR(stblock.st_mode) && !retried) {
newname = unrawname(newname);
retried++;
goto retry;
} else if ((fsp = getfsfile(newname)) != 0 && !retried) {
newname = fsp->fs_spec;
retried++;
goto retry;
}
return (origname);
}
void *
emalloc(s)
size_t s;
{
void *p;
p = malloc(s);
if (p == NULL)
err(1, "malloc failed");
return (p);
}
void *
erealloc(p, s)
void *p;
size_t s;
{
void *q;
q = realloc(p, s);
if (q == NULL)
err(1, "realloc failed");
return (q);
}
char *
estrdup(s)
const char *s;
{
char *p;
p = strdup(s);
if (p == NULL)
err(1, "strdup failed");
return (p);
}