mirror of https://github.com/libAthena/athena.git
322 lines
8.8 KiB
C
322 lines
8.8 KiB
C
#if defined(GEKKO) || defined(__SWITCH__)
|
|
#include "athena/gekko_support.h"
|
|
#define SYMLOOP_MAX 8
|
|
#include <sys/stat.h>
|
|
#include <sys/param.h>
|
|
#include <stddef.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <stdarg.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <limits.h>
|
|
|
|
/* A slightly modified copy of this file exists in libexec/ld.so */
|
|
|
|
/*
|
|
* char *realpath(const char *path, char resolved[PATH_MAX]);
|
|
*
|
|
* Find the real name of path, by removing all ".", ".." and symlink
|
|
* components. Returns (resolved) on success, or (NULL) on failure,
|
|
* in which case the path which caused trouble is left in (resolved).
|
|
*/
|
|
char *realpath(const char *path, char *resolved) {
|
|
struct stat sb;
|
|
char *p, *q, *s;
|
|
size_t left_len, resolved_len;
|
|
unsigned symlinks;
|
|
int serrno, slen, mem_allocated;
|
|
char left[PATH_MAX], next_token[PATH_MAX], symlink[PATH_MAX];
|
|
|
|
if (path[0] == '\0') {
|
|
errno = ENOENT;
|
|
return (NULL);
|
|
}
|
|
|
|
serrno = errno;
|
|
|
|
if (resolved == NULL) {
|
|
resolved = malloc(PATH_MAX);
|
|
if (resolved == NULL) return (NULL);
|
|
mem_allocated = 1;
|
|
} else
|
|
mem_allocated = 0;
|
|
|
|
symlinks = 0;
|
|
if (path[0] == '/') {
|
|
resolved[0] = '/';
|
|
resolved[1] = '\0';
|
|
if (path[1] == '\0') return (resolved);
|
|
resolved_len = 1;
|
|
left_len = strlcpy(left, path + 1, sizeof(left));
|
|
} else {
|
|
if (getcwd(resolved, PATH_MAX) == NULL) {
|
|
if (mem_allocated)
|
|
free(resolved);
|
|
else
|
|
strlcpy(resolved, ".", PATH_MAX);
|
|
return (NULL);
|
|
}
|
|
resolved_len = strlen(resolved);
|
|
left_len = strlcpy(left, path, sizeof(left));
|
|
}
|
|
if (left_len >= sizeof(left) || resolved_len >= PATH_MAX) {
|
|
errno = ENAMETOOLONG;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Iterate over path components in `left'.
|
|
*/
|
|
while (left_len != 0) {
|
|
/*
|
|
* Extract the next path component and adjust `left'
|
|
* and its length.
|
|
*/
|
|
p = strchr(left, '/');
|
|
s = p ? p : left + left_len;
|
|
if (s - left >= sizeof(next_token)) {
|
|
errno = ENAMETOOLONG;
|
|
goto err;
|
|
}
|
|
memcpy(next_token, left, s - left);
|
|
next_token[s - left] = '\0';
|
|
left_len -= s - left;
|
|
if (p != NULL) memmove(left, s + 1, left_len + 1);
|
|
if (resolved[resolved_len - 1] != '/') {
|
|
if (resolved_len + 1 >= PATH_MAX) {
|
|
errno = ENAMETOOLONG;
|
|
goto err;
|
|
}
|
|
resolved[resolved_len++] = '/';
|
|
resolved[resolved_len] = '\0';
|
|
}
|
|
if (next_token[0] == '\0')
|
|
continue;
|
|
else if (strcmp(next_token, ".") == 0)
|
|
continue;
|
|
else if (strcmp(next_token, "..") == 0) {
|
|
/*
|
|
* Strip the last path component except when we have
|
|
* single "/"
|
|
*/
|
|
if (resolved_len > 1) {
|
|
resolved[resolved_len - 1] = '\0';
|
|
q = strrchr(resolved, '/') + 1;
|
|
*q = '\0';
|
|
resolved_len = q - resolved;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Append the next path component and lstat() it. If
|
|
* lstat() fails we still can return successfully if
|
|
* there are no more path components left.
|
|
*/
|
|
resolved_len = strlcat(resolved, next_token, PATH_MAX);
|
|
if (resolved_len >= PATH_MAX) {
|
|
errno = ENAMETOOLONG;
|
|
goto err;
|
|
}
|
|
if (lstat(resolved, &sb) != 0) {
|
|
if (errno == ENOENT && p == NULL) {
|
|
errno = serrno;
|
|
return (resolved);
|
|
}
|
|
goto err;
|
|
}
|
|
if (S_ISLNK(sb.st_mode)) {
|
|
if (symlinks++ > SYMLOOP_MAX) {
|
|
errno = ELOOP;
|
|
goto err;
|
|
}
|
|
slen = readlink(resolved, symlink, sizeof(symlink) - 1);
|
|
if (slen < 0) goto err;
|
|
symlink[slen] = '\0';
|
|
if (symlink[0] == '/') {
|
|
resolved[1] = 0;
|
|
resolved_len = 1;
|
|
} else if (resolved_len > 1) {
|
|
/* Strip the last path component. */
|
|
resolved[resolved_len - 1] = '\0';
|
|
q = strrchr(resolved, '/') + 1;
|
|
*q = '\0';
|
|
resolved_len = q - resolved;
|
|
}
|
|
|
|
/*
|
|
* If there are any path components left, then
|
|
* append them to symlink. The result is placed
|
|
* in `left'.
|
|
*/
|
|
if (p != NULL) {
|
|
if (symlink[slen - 1] != '/') {
|
|
if (slen + 1 >= sizeof(symlink)) {
|
|
errno = ENAMETOOLONG;
|
|
goto err;
|
|
}
|
|
symlink[slen] = '/';
|
|
symlink[slen + 1] = 0;
|
|
}
|
|
left_len = strlcat(symlink, left, sizeof(symlink));
|
|
if (left_len >= sizeof(left)) {
|
|
errno = ENAMETOOLONG;
|
|
goto err;
|
|
}
|
|
}
|
|
left_len = strlcpy(left, symlink, sizeof(left));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Remove trailing slash except when the resolved pathname
|
|
* is a single "/".
|
|
*/
|
|
if (resolved_len > 1 && resolved[resolved_len - 1] == '/')
|
|
resolved[resolved_len - 1] = '\0';
|
|
return (resolved);
|
|
|
|
err:
|
|
if (mem_allocated) free(resolved);
|
|
return (NULL);
|
|
}
|
|
|
|
static int int_vasprintf(result, format, args) char **result;
|
|
const char *format;
|
|
va_list *args;
|
|
{
|
|
const char *p = format;
|
|
/* Add one to make sure that it is never zero, which might cause malloc
|
|
to return NULL. */
|
|
int total_width = strlen(format) + 1;
|
|
va_list ap;
|
|
|
|
memcpy((void *)&ap, (void *)args, sizeof(va_list));
|
|
|
|
while (*p != '\0') {
|
|
if (*p++ == '%') {
|
|
while (strchr("-+ #0", *p)) ++p;
|
|
if (*p == '*') {
|
|
++p;
|
|
total_width += abs(va_arg(ap, int));
|
|
} else
|
|
total_width += strtoul(p, (char **)&p, 10);
|
|
if (*p == '.') {
|
|
++p;
|
|
if (*p == '*') {
|
|
++p;
|
|
total_width += abs(va_arg(ap, int));
|
|
} else
|
|
total_width += strtoul(p, (char **)&p, 10);
|
|
}
|
|
while (strchr("hlL", *p)) ++p;
|
|
/* Should be big enough for any format specifier except %s and floats. */
|
|
total_width += 30;
|
|
switch (*p) {
|
|
case 'd':
|
|
case 'i':
|
|
case 'o':
|
|
case 'u':
|
|
case 'x':
|
|
case 'X':
|
|
case 'c':
|
|
(void)va_arg(ap, int);
|
|
break;
|
|
case 'f':
|
|
case 'e':
|
|
case 'E':
|
|
case 'g':
|
|
case 'G':
|
|
(void)va_arg(ap, double);
|
|
/* Since an ieee double can have an exponent of 307, we'll
|
|
make the buffer wide enough to cover the gross case. */
|
|
total_width += 307;
|
|
break;
|
|
case 's':
|
|
total_width += strlen(va_arg(ap, char *));
|
|
break;
|
|
case 'p':
|
|
case 'n':
|
|
(void)va_arg(ap, char *);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#ifdef TEST
|
|
global_total_width = total_width;
|
|
#endif
|
|
*result = malloc(total_width);
|
|
if (*result != NULL)
|
|
return vsprintf(*result, format, *args);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
int vasprintf(result, format, args) char **result;
|
|
const char *format;
|
|
#if defined(_BSD_VA_LIST_) && defined(__FreeBSD__)
|
|
_BSD_VA_LIST_ args;
|
|
#else
|
|
va_list args;
|
|
#endif
|
|
{ return int_vasprintf(result, format, &args); }
|
|
|
|
int vsnprintf(char *s, size_t n, const char *format, va_list ap) {
|
|
char *buf = 0;
|
|
int result = vasprintf(&buf, format, ap);
|
|
|
|
if (!buf) return -1;
|
|
if (result < 0) {
|
|
free(buf);
|
|
return -1;
|
|
}
|
|
|
|
result = strlen(buf);
|
|
if (n > 0) {
|
|
if ((long)n > result)
|
|
memcpy(s, buf, result + 1);
|
|
else {
|
|
memcpy(s, buf, n - 1);
|
|
s[n - 1] = 0;
|
|
}
|
|
}
|
|
free(buf);
|
|
return result;
|
|
}
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#include <stdio.h>
|
|
#include <stdarg.h>
|
|
/*
|
|
* PUBLIC: #ifndef HAVE_SNPRINTF
|
|
* PUBLIC: int snprintf __P((char *, size_t, const char *, ...));
|
|
* PUBLIC: #endif
|
|
*/
|
|
int
|
|
snprintf(char *str, size_t n, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
int rval;
|
|
va_start(ap, fmt);
|
|
rval = vsprintf(str, fmt, ap);
|
|
va_end(ap);
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Convert a string to a quad integer.
|
|
*/
|
|
long long strtoq(const char *nptr, char **endptr, int base) {
|
|
return strtoll(nptr, endptr, base);
|
|
}
|
|
|
|
/*
|
|
* Convert a string to an unsigned quad integer.
|
|
*/
|
|
unsigned long long strtouq(const char *nptr, char **endptr, int base) {
|
|
return strtoull(nptr, endptr, base);
|
|
}
|