#include "qemu/host-utils.h"
#include <math.h>
-#include "qemu-common.h"
-#include "qemu/sockets.h"
-#include "qemu/iov.h"
-#include "net/net.h"
+#ifdef __FreeBSD__
+#include <sys/sysctl.h>
+#include <sys/user.h>
+#endif
+
+#ifdef __NetBSD__
+#include <sys/sysctl.h>
+#endif
+
+#ifdef __HAIKU__
+#include <kernel/image.h>
+#endif
+
+#ifdef __APPLE__
+#include <mach-o/dyld.h>
+#endif
+
+#ifdef G_OS_WIN32
+#include <pathcch.h>
+#include <wchar.h>
+#endif
+
#include "qemu/ctype.h"
#include "qemu/cutils.h"
#include "qemu/error-report.h"
return t;
}
-/*
- * Make sure data goes on disk, but if possible do not bother to
- * write out the inode just for timestamp updates.
- *
- * Unfortunately even in 2009 many operating systems do not support
- * fdatasync and have to fall back to fsync.
- */
-int qemu_fdatasync(int fd)
-{
-#ifdef CONFIG_FDATASYNC
- return fdatasync(fd);
-#else
- return fsync(fd);
-#endif
-}
-
-/**
- * Sync changes made to the memory mapped file back to the backing
- * storage. For POSIX compliant systems this will fallback
- * to regular msync call. Otherwise it will trigger whole file sync
- * (including the metadata case there is no support to skip that otherwise)
- *
- * @addr - start of the memory area to be synced
- * @length - length of the are to be synced
- * @fd - file descriptor for the file to be synced
- * (mandatory only for POSIX non-compliant systems)
- */
-int qemu_msync(void *addr, size_t length, int fd)
-{
-#ifdef CONFIG_POSIX
- size_t align_mask = ~(qemu_real_host_page_size - 1);
-
- /**
- * There are no strict reqs as per the length of mapping
- * to be synced. Still the length needs to follow the address
- * alignment changes. Additionally - round the size to the multiple
- * of PAGE_SIZE
- */
- length += ((uintptr_t)addr & (qemu_real_host_page_size - 1));
- length = (length + ~align_mask) & align_mask;
-
- addr = (void *)((uintptr_t)addr & align_mask);
-
- return msync(addr, length, MS_SYNC);
-#else /* CONFIG_POSIX */
- /**
- * Perform the sync based on the file descriptor
- * The sync range will most probably be wider than the one
- * requested - but it will still get the job done
- */
- return qemu_fdatasync(fd);
-#endif /* CONFIG_POSIX */
-}
-
-#ifndef _WIN32
-/* Sets a specific flag */
-int fcntl_setfl(int fd, int flag)
-{
- int flags;
-
- flags = fcntl(fd, F_GETFL);
- if (flags == -1)
- return -errno;
-
- if (fcntl(fd, F_SETFL, flags | flag) == -1)
- return -errno;
-
- return 0;
-}
-#endif
-
static int64_t suffix_mul(char suffix, int64_t unit)
{
switch (qemu_toupper(suffix)) {
* - 12345 - decimal, scale determined by @default_suffix and @unit
* - 12345{bBkKmMgGtTpPeE} - decimal, scale determined by suffix and @unit
* - 12345.678{kKmMgGtTpPeE} - decimal, scale determined by suffix, and
- * fractional portion is truncated to byte
+ * fractional portion is truncated to byte, either side of . may be empty
* - 0x7fEE - hexadecimal, unit determined by @default_suffix
*
- * The following cause a deprecation warning, and may be removed in the future
- * - 0xabc{kKmMgGtTpP} - hex with scaling suffix
- *
* The following are intentionally not supported
- * - octal, such as 08
- * - fractional hex, such as 0x1.8
- * - floating point exponents, such as 1e3
+ * - hex with scaling suffix, such as 0x20M or 0x1p3 (both fail with
+ * -EINVAL), while 0x1b is 27 (not 1 with byte scale)
+ * - octal, such as 08 (parsed as decimal instead)
+ * - binary, such as 0b1000 (parsed as 0b with trailing garbage "1000")
+ * - fractional hex, such as 0x1.8 (parsed as 0 with trailing garbage "x1.8")
+ * - negative values, including -0 (fail with -ERANGE)
+ * - floating point exponents, such as 1e3 (parsed as 1e with trailing
+ * garbage "3") or 0x1p3 (rejected as hex with scaling suffix)
+ * - non-finite values, such as inf or NaN (fail with -EINVAL)
*
* The end pointer will be returned in *end, if not NULL. If there is
* no fraction, the input can be decimal or hexadecimal; if there is a
- * fraction, then the input must be decimal and there must be a suffix
- * (possibly by @default_suffix) larger than Byte, and the fractional
- * portion may suffer from precision loss or rounding. The input must
- * be positive.
+ * non-zero fraction, then the input must be decimal and there must be
+ * a suffix (possibly by @default_suffix) larger than Byte, and the
+ * fractional portion may suffer from precision loss or rounding. The
+ * input must be positive.
*
* Return -ERANGE on overflow (with *@end advanced), and -EINVAL on
- * other error (with *@end left unchanged).
+ * other error (with *@end at @nptr). Unlike strtoull, *@result is
+ * set to 0 on all errors, as returning UINT64_MAX on overflow is less
+ * likely to be usable as a size.
*/
static int do_strtosz(const char *nptr, const char **end,
const char default_suffix, int64_t unit,
uint64_t *result)
{
int retval;
- const char *endptr, *f;
+ const char *endptr;
unsigned char c;
- bool hex = false;
- uint64_t val, valf = 0;
+ uint64_t val = 0, valf = 0;
int64_t mul;
/* Parse integral portion as decimal. */
- retval = qemu_strtou64(nptr, &endptr, 10, &val);
- if (retval) {
- goto out;
- }
- if (memchr(nptr, '-', endptr - nptr) != NULL) {
- endptr = nptr;
- retval = -EINVAL;
+ retval = parse_uint(nptr, &endptr, 10, &val);
+ if (retval == -ERANGE || !nptr) {
goto out;
}
- if (val == 0 && (*endptr == 'x' || *endptr == 'X')) {
- /* Input looks like hex, reparse, and insist on no fraction. */
+ if (retval == 0 && val == 0 && (*endptr == 'x' || *endptr == 'X')) {
+ /* Input looks like hex; reparse, and insist on no fraction or suffix. */
retval = qemu_strtou64(nptr, &endptr, 16, &val);
if (retval) {
goto out;
}
- if (*endptr == '.') {
+ if (*endptr == '.' || suffix_mul(*endptr, unit) > 0) {
endptr = nptr;
retval = -EINVAL;
goto out;
}
- hex = true;
- } else if (*endptr == '.') {
+ } else if (*endptr == '.' || (endptr == nptr && strchr(nptr, '.'))) {
/*
* Input looks like a fraction. Make sure even 1.k works
- * without fractional digits. If we see an exponent, treat
- * the entire input as invalid instead.
+ * without fractional digits. strtod tries to treat 'e' as an
+ * exponent, but we want to treat it as a scaling suffix;
+ * doing this requires modifying a copy of the fraction.
*/
- double fraction;
+ double fraction = 0.0;
- f = endptr;
- retval = qemu_strtod_finite(f, &endptr, &fraction);
- if (retval) {
+ if (retval == 0 && *endptr == '.' && !isdigit(endptr[1])) {
+ /* If we got here, we parsed at least one digit already. */
endptr++;
- } else if (memchr(f, 'e', endptr - f) || memchr(f, 'E', endptr - f)) {
- endptr = nptr;
- retval = -EINVAL;
- goto out;
} else {
- /* Extract into a 64-bit fixed-point fraction. */
+ char *e;
+ const char *tail;
+ g_autofree char *copy = g_strdup(endptr);
+
+ e = strchr(copy, 'e');
+ if (e) {
+ *e = '\0';
+ }
+ e = strchr(copy, 'E');
+ if (e) {
+ *e = '\0';
+ }
+ /*
+ * If this is a floating point, we are guaranteed that '.'
+ * appears before any possible digits in copy. If it is
+ * not a floating point, strtod will fail. Either way,
+ * there is now no exponent in copy, so if it parses, we
+ * know 0.0 <= abs(result) <= 1.0 (after rounding), and
+ * ERANGE is only possible on underflow which is okay.
+ */
+ retval = qemu_strtod_finite(copy, &tail, &fraction);
+ endptr += tail - copy;
+ if (signbit(fraction)) {
+ retval = -ERANGE;
+ goto out;
+ }
+ }
+
+ /* Extract into a 64-bit fixed-point fraction. */
+ if (fraction == 1.0) {
+ if (val == UINT64_MAX) {
+ retval = -ERANGE;
+ goto out;
+ }
+ val++;
+ } else if (retval == -ERANGE) {
+ /* See comments above about underflow */
+ valf = 1;
+ retval = 0;
+ } else {
+ /* We want non-zero valf for any non-zero fraction */
valf = (uint64_t)(fraction * 0x1p64);
+ if (valf == 0 && fraction > 0.0) {
+ valf = 1;
+ }
}
}
+ if (retval) {
+ goto out;
+ }
c = *endptr;
mul = suffix_mul(c, unit);
if (mul > 0) {
- if (hex) {
- warn_report("Using a multiplier suffix on hex numbers "
- "is deprecated: %s", nptr);
- }
endptr++;
} else {
mul = suffix_mul(default_suffix, unit);
}
}
- *result = val;
retval = 0;
out:
if (end) {
*end = endptr;
- } else if (*endptr) {
+ } else if (nptr && *endptr) {
retval = -EINVAL;
}
+ if (retval == 0) {
+ *result = val;
+ } else {
+ *result = 0;
+ if (end && retval == -EINVAL) {
+ *end = nptr;
+ }
+ }
return retval;
}
* Helper function for error checking after strtol() and the like
*/
static int check_strtox_error(const char *nptr, char *ep,
- const char **endptr, int libc_errno)
+ const char **endptr, bool check_zero,
+ int libc_errno)
{
assert(ep >= nptr);
+
+ /* Windows has a bug in that it fails to parse 0 from "0x" in base 16 */
+ if (check_zero && ep == nptr && libc_errno == 0) {
+ char *tmp;
+
+ errno = 0;
+ if (strtol(nptr, &tmp, 10) == 0 && errno == 0 &&
+ (*tmp == 'x' || *tmp == 'X')) {
+ ep = tmp;
+ }
+ }
+
if (endptr) {
*endptr = ep;
}
*
* @nptr may be null, and no conversion is performed then.
*
- * If no conversion is performed, store @nptr in *@endptr and return
- * -EINVAL.
+ * If no conversion is performed, store @nptr in *@endptr, 0 in
+ * @result, and return -EINVAL.
*
* If @endptr is null, and the string isn't fully converted, return
- * -EINVAL. This is the case when the pointer that would be stored in
- * a non-null @endptr points to a character other than '\0'.
+ * -EINVAL with @result set to the parsed value. This is the case
+ * when the pointer that would be stored in a non-null @endptr points
+ * to a character other than '\0'.
*
* If the conversion overflows @result, store INT_MAX in @result,
* and return -ERANGE.
* and return -ERANGE.
*
* Else store the converted value in @result, and return zero.
+ *
+ * This matches the behavior of strtol() on 32-bit platforms, even on
+ * platforms where long is 64-bits.
*/
int qemu_strtoi(const char *nptr, const char **endptr, int base,
int *result)
assert((unsigned) base <= 36 && base != 1);
if (!nptr) {
+ *result = 0;
if (endptr) {
*endptr = nptr;
}
} else {
*result = lresult;
}
- return check_strtox_error(nptr, ep, endptr, errno);
+ return check_strtox_error(nptr, ep, endptr, lresult == 0, errno);
}
/**
*
* @nptr may be null, and no conversion is performed then.
*
- * If no conversion is performed, store @nptr in *@endptr and return
- * -EINVAL.
+ * If no conversion is performed, store @nptr in *@endptr, 0 in
+ * @result, and return -EINVAL.
*
* If @endptr is null, and the string isn't fully converted, return
- * -EINVAL. This is the case when the pointer that would be stored in
- * a non-null @endptr points to a character other than '\0'.
+ * -EINVAL with @result set to the parsed value. This is the case
+ * when the pointer that would be stored in a non-null @endptr points
+ * to a character other than '\0'.
*
* If the conversion overflows @result, store UINT_MAX in @result,
* and return -ERANGE.
*
* Note that a number with a leading minus sign gets converted without
* the minus sign, checked for overflow (see above), then negated (in
- * @result's type). This is exactly how strtoul() works.
+ * @result's type). This matches the behavior of strtoul() on 32-bit
+ * platforms, even on platforms where long is 64-bits.
*/
int qemu_strtoui(const char *nptr, const char **endptr, int base,
unsigned int *result)
{
char *ep;
- long long lresult;
+ unsigned long long lresult;
+ bool neg;
assert((unsigned) base <= 36 && base != 1);
if (!nptr) {
+ *result = 0;
if (endptr) {
*endptr = nptr;
}
if (errno == ERANGE) {
*result = -1;
} else {
+ /*
+ * Note that platforms with 32-bit strtoul only accept input
+ * in the range [-4294967295, 4294967295]; but we used 64-bit
+ * strtoull which wraps -18446744073709551615 to 1 instead of
+ * declaring overflow. So we must check if '-' was parsed,
+ * and if so, undo the negation before doing our bounds check.
+ */
+ neg = memchr(nptr, '-', ep - nptr) != NULL;
+ if (neg) {
+ lresult = -lresult;
+ }
if (lresult > UINT_MAX) {
*result = UINT_MAX;
errno = ERANGE;
- } else if (lresult < INT_MIN) {
- *result = UINT_MAX;
- errno = ERANGE;
} else {
- *result = lresult;
+ *result = neg ? -lresult : lresult;
}
}
- return check_strtox_error(nptr, ep, endptr, errno);
+ return check_strtox_error(nptr, ep, endptr, lresult == 0, errno);
}
/**
*
* @nptr may be null, and no conversion is performed then.
*
- * If no conversion is performed, store @nptr in *@endptr and return
- * -EINVAL.
+ * If no conversion is performed, store @nptr in *@endptr, 0 in
+ * @result, and return -EINVAL.
*
* If @endptr is null, and the string isn't fully converted, return
- * -EINVAL. This is the case when the pointer that would be stored in
- * a non-null @endptr points to a character other than '\0'.
+ * -EINVAL with @result set to the parsed value. This is the case
+ * when the pointer that would be stored in a non-null @endptr points
+ * to a character other than '\0'.
*
* If the conversion overflows @result, store LONG_MAX in @result,
* and return -ERANGE.
assert((unsigned) base <= 36 && base != 1);
if (!nptr) {
+ *result = 0;
if (endptr) {
*endptr = nptr;
}
errno = 0;
*result = strtol(nptr, &ep, base);
- return check_strtox_error(nptr, ep, endptr, errno);
+ return check_strtox_error(nptr, ep, endptr, *result == 0, errno);
}
/**
*
* @nptr may be null, and no conversion is performed then.
*
- * If no conversion is performed, store @nptr in *@endptr and return
- * -EINVAL.
+ * If no conversion is performed, store @nptr in *@endptr, 0 in
+ * @result, and return -EINVAL.
*
* If @endptr is null, and the string isn't fully converted, return
- * -EINVAL. This is the case when the pointer that would be stored in
- * a non-null @endptr points to a character other than '\0'.
+ * -EINVAL with @result set to the parsed value. This is the case
+ * when the pointer that would be stored in a non-null @endptr points
+ * to a character other than '\0'.
*
* If the conversion overflows @result, store ULONG_MAX in @result,
* and return -ERANGE.
assert((unsigned) base <= 36 && base != 1);
if (!nptr) {
+ *result = 0;
if (endptr) {
*endptr = nptr;
}
if (errno == ERANGE) {
*result = -1;
}
- return check_strtox_error(nptr, ep, endptr, errno);
+ return check_strtox_error(nptr, ep, endptr, *result == 0, errno);
}
/**
assert((unsigned) base <= 36 && base != 1);
if (!nptr) {
+ *result = 0;
if (endptr) {
*endptr = nptr;
}
QEMU_BUILD_BUG_ON(sizeof(int64_t) != sizeof(long long));
errno = 0;
*result = strtoll(nptr, &ep, base);
- return check_strtox_error(nptr, ep, endptr, errno);
+ return check_strtox_error(nptr, ep, endptr, *result == 0, errno);
}
/**
* Convert string @nptr to an uint64_t.
*
* Works like qemu_strtoul(), except it stores UINT64_MAX on overflow.
+ * (If you want to prohibit negative numbers that wrap around to
+ * positive, use parse_uint()).
*/
int qemu_strtou64(const char *nptr, const char **endptr, int base,
uint64_t *result)
assert((unsigned) base <= 36 && base != 1);
if (!nptr) {
+ *result = 0;
if (endptr) {
*endptr = nptr;
}
if (errno == ERANGE) {
*result = -1;
}
- return check_strtox_error(nptr, ep, endptr, errno);
+ return check_strtox_error(nptr, ep, endptr, *result == 0, errno);
}
/**
*
* @nptr may be null, and no conversion is performed then.
*
- * If no conversion is performed, store @nptr in *@endptr and return
- * -EINVAL.
+ * If no conversion is performed, store @nptr in *@endptr, +0.0 in
+ * @result, and return -EINVAL.
*
* If @endptr is null, and the string isn't fully converted, return
- * -EINVAL. This is the case when the pointer that would be stored in
- * a non-null @endptr points to a character other than '\0'.
+ * -EINVAL with @result set to the parsed value. This is the case
+ * when the pointer that would be stored in a non-null @endptr points
+ * to a character other than '\0'.
*
* If the conversion overflows, store +/-HUGE_VAL in @result, depending
* on the sign, and return -ERANGE.
char *ep;
if (!nptr) {
+ *result = 0.0;
if (endptr) {
*endptr = nptr;
}
errno = 0;
*result = strtod(nptr, &ep);
- return check_strtox_error(nptr, ep, endptr, errno);
+ return check_strtox_error(nptr, ep, endptr, false, errno);
}
/**
* Convert string @nptr to a finite double.
*
- * Works like qemu_strtod(), except that "NaN" and "inf" are rejected
- * with -EINVAL and no conversion is performed.
+ * Works like qemu_strtod(), except that "NaN", "inf", and strings
+ * that cause ERANGE overflow errors are rejected with -EINVAL as if
+ * no conversion is performed, storing 0.0 into @result regardless of
+ * any sign. -ERANGE failures for underflow still preserve the parsed
+ * sign.
*/
int qemu_strtod_finite(const char *nptr, const char **endptr, double *result)
{
- double tmp;
+ const char *tmp;
int ret;
- ret = qemu_strtod(nptr, endptr, &tmp);
- if (!ret && !isfinite(tmp)) {
+ ret = qemu_strtod(nptr, &tmp, result);
+ if (!isfinite(*result)) {
if (endptr) {
*endptr = nptr;
}
+ *result = 0.0;
+ ret = -EINVAL;
+ } else if (endptr) {
+ *endptr = tmp;
+ } else if (*tmp) {
ret = -EINVAL;
- }
-
- if (ret != -EINVAL) {
- *result = tmp;
}
return ret;
}
* parse_uint:
*
* @s: String to parse
- * @value: Destination for parsed integer value
* @endptr: Destination for pointer to first character not consumed
* @base: integer base, between 2 and 36 inclusive, or 0
+ * @value: Destination for parsed integer value
*
* Parse unsigned integer
*
* Parsed syntax is like strtoull()'s: arbitrary whitespace, a single optional
* '+' or '-', an optional "0x" if @base is 0 or 16, one or more digits.
*
- * If @s is null, or @base is invalid, or @s doesn't start with an
- * integer in the syntax above, set *@value to 0, *@endptr to @s, and
- * return -EINVAL.
+ * If @s is null, or @s doesn't start with an integer in the syntax
+ * above, set *@value to 0, *@endptr to @s, and return -EINVAL.
*
* Set *@endptr to point right beyond the parsed integer (even if the integer
* overflows or is negative, all digits will be parsed and *@endptr will
- * point right beyond them).
+ * point right beyond them). If @endptr is %NULL, any trailing character
+ * instead causes a result of -EINVAL with *@value of 0.
*
* If the integer is negative, set *@value to 0, and return -ERANGE.
+ * (If you want to allow negative numbers that wrap around within
+ * bounds, use qemu_strtou64()).
*
* If the integer overflows unsigned long long, set *@value to
* ULLONG_MAX, and return -ERANGE.
*
* Else, set *@value to the parsed integer, and return 0.
*/
-int parse_uint(const char *s, unsigned long long *value, char **endptr,
- int base)
+int parse_uint(const char *s, const char **endptr, int base, uint64_t *value)
{
int r = 0;
char *endp = (char *)s;
out:
*value = val;
- *endptr = endp;
+ if (endptr) {
+ *endptr = endp;
+ } else if (s && *endp) {
+ r = -EINVAL;
+ *value = 0;
+ }
return r;
}
* parse_uint_full:
*
* @s: String to parse
- * @value: Destination for parsed integer value
* @base: integer base, between 2 and 36 inclusive, or 0
+ * @value: Destination for parsed integer value
*
- * Parse unsigned integer from entire string
+ * Parse unsigned integer from entire string, rejecting any trailing slop.
*
- * Have the same behavior of parse_uint(), but with an additional check
- * for additional data after the parsed number. If extra characters are present
- * after the parsed number, the function will return -EINVAL, and *@v will
- * be set to 0.
+ * Shorthand for parse_uint(s, NULL, base, value).
*/
-int parse_uint_full(const char *s, unsigned long long *value, int base)
+int parse_uint_full(const char *s, int base, uint64_t *value)
{
- char *endp;
- int r;
-
- r = parse_uint(s, value, &endp, base);
- if (r < 0) {
- return r;
- }
- if (*endp) {
- *value = 0;
- return -EINVAL;
- }
-
- return 0;
+ return parse_uint(s, NULL, base, value);
}
int qemu_parse_fd(const char *param)
return debug;
}
-/*
- * Helper to print ethernet mac address
- */
-const char *qemu_ether_ntoa(const MACAddr *mac)
+const char *si_prefix(unsigned int exp10)
{
- static char ret[18];
+ static const char *prefixes[] = {
+ "a", "f", "p", "n", "u", "m", "", "K", "M", "G", "T", "P", "E"
+ };
- snprintf(ret, sizeof(ret), "%02x:%02x:%02x:%02x:%02x:%02x",
- mac->a[0], mac->a[1], mac->a[2], mac->a[3], mac->a[4], mac->a[5]);
+ exp10 += 18;
+ assert(exp10 % 3 == 0 && exp10 / 3 < ARRAY_SIZE(prefixes));
+ return prefixes[exp10 / 3];
+}
- return ret;
+const char *iec_binary_prefix(unsigned int exp2)
+{
+ static const char *prefixes[] = { "", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei" };
+
+ assert(exp2 % 10 == 0 && exp2 / 10 < ARRAY_SIZE(prefixes));
+ return prefixes[exp2 / 10];
}
/*
*/
char *size_to_str(uint64_t val)
{
- static const char *suffixes[] = { "", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei" };
uint64_t div;
int i;
* (see e41b509d68afb1f for more info)
*/
frexp(val / (1000.0 / 1024.0), &i);
- i = (i - 1) / 10;
- div = 1ULL << (i * 10);
+ i = (i - 1) / 10 * 10;
+ div = 1ULL << i;
- return g_strdup_printf("%0.3g %sB", (double)val / div, suffixes[i]);
+ return g_strdup_printf("%0.3g %sB", (double)val / div, iec_binary_prefix(i));
}
char *freq_to_str(uint64_t freq_hz)
{
- static const char *const suffixes[] = { "", "K", "M", "G", "T", "P", "E" };
double freq = freq_hz;
- size_t idx = 0;
+ size_t exp10 = 0;
while (freq >= 1000.0) {
freq /= 1000.0;
- idx++;
+ exp10 += 3;
}
- assert(idx < ARRAY_SIZE(suffixes));
- return g_strdup_printf("%0.3g %sHz", freq, suffixes[idx]);
+ return g_strdup_printf("%0.3g %sHz", freq, si_prefix(exp10));
}
int qemu_pstrcmp0(const char **str1, const char **str2)
static inline bool starts_with_prefix(const char *dir)
{
size_t prefix_len = strlen(CONFIG_PREFIX);
+ /*
+ * dir[prefix_len] is only accessed if the length of dir is
+ * >= prefix_len, so no out of bounds access is possible.
+ */
+#pragma GCC diagnostic push
+#if !defined(__clang__) || __has_warning("-Warray-bounds=")
+#pragma GCC diagnostic ignored "-Warray-bounds="
+#endif
return !memcmp(dir, CONFIG_PREFIX, prefix_len) &&
(!dir[prefix_len] || G_IS_DIR_SEPARATOR(dir[prefix_len]));
+#pragma GCC diagnostic pop
}
/* Return the next path component in dir, and store its length in *p_len. */
return dir;
}
+static const char *exec_dir;
+
+void qemu_init_exec_dir(const char *argv0)
+{
+#ifdef G_OS_WIN32
+ char *p;
+ char buf[MAX_PATH];
+ DWORD len;
+
+ if (exec_dir) {
+ return;
+ }
+
+ len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
+ if (len == 0) {
+ return;
+ }
+
+ buf[len] = 0;
+ p = buf + len - 1;
+ while (p != buf && *p != '\\') {
+ p--;
+ }
+ *p = 0;
+ if (access(buf, R_OK) == 0) {
+ exec_dir = g_strdup(buf);
+ } else {
+ exec_dir = CONFIG_BINDIR;
+ }
+#else
+ char *p = NULL;
+ char buf[PATH_MAX];
+
+ if (exec_dir) {
+ return;
+ }
+
+#if defined(__linux__)
+ {
+ int len;
+ len = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
+ if (len > 0) {
+ buf[len] = 0;
+ p = buf;
+ }
+ }
+#elif defined(__FreeBSD__) \
+ || (defined(__NetBSD__) && defined(KERN_PROC_PATHNAME))
+ {
+#if defined(__FreeBSD__)
+ static int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
+#else
+ static int mib[4] = {CTL_KERN, KERN_PROC_ARGS, -1, KERN_PROC_PATHNAME};
+#endif
+ size_t len = sizeof(buf) - 1;
+
+ *buf = '\0';
+ if (!sysctl(mib, ARRAY_SIZE(mib), buf, &len, NULL, 0) &&
+ *buf) {
+ buf[sizeof(buf) - 1] = '\0';
+ p = buf;
+ }
+ }
+#elif defined(__APPLE__)
+ {
+ char fpath[PATH_MAX];
+ uint32_t len = sizeof(fpath);
+ if (_NSGetExecutablePath(fpath, &len) == 0) {
+ p = realpath(fpath, buf);
+ if (!p) {
+ return;
+ }
+ }
+ }
+#elif defined(__HAIKU__)
+ {
+ image_info ii;
+ int32_t c = 0;
+
+ *buf = '\0';
+ while (get_next_image_info(0, &c, &ii) == B_OK) {
+ if (ii.type == B_APP_IMAGE) {
+ strncpy(buf, ii.name, sizeof(buf));
+ buf[sizeof(buf) - 1] = 0;
+ p = buf;
+ break;
+ }
+ }
+ }
+#endif
+ /* If we don't have any way of figuring out the actual executable
+ location then try argv[0]. */
+ if (!p && argv0) {
+ p = realpath(argv0, buf);
+ }
+ if (p) {
+ exec_dir = g_path_get_dirname(p);
+ } else {
+ exec_dir = CONFIG_BINDIR;
+ }
+#endif
+}
+
+const char *qemu_get_exec_dir(void)
+{
+ return exec_dir;
+}
+
char *get_relocated_path(const char *dir)
{
size_t prefix_len = strlen(CONFIG_PREFIX);
const char *bindir = CONFIG_BINDIR;
- const char *exec_dir = qemu_get_exec_dir();
GString *result;
int len_dir, len_bindir;
/* Fail if qemu_init_exec_dir was not called. */
assert(exec_dir[0]);
- if (!starts_with_prefix(dir) || !starts_with_prefix(bindir)) {
- return g_strdup(dir);
- }
result = g_string_new(exec_dir);
+ g_string_append(result, "/qemu-bundle");
+ if (access(result->str, R_OK) == 0) {
+#ifdef G_OS_WIN32
+ const char *src = dir;
+ size_t size = mbsrtowcs(NULL, &src, 0, &(mbstate_t){0}) + 1;
+ PWSTR wdir = g_new(WCHAR, size);
+ mbsrtowcs(wdir, &src, size, &(mbstate_t){0});
+
+ PCWSTR wdir_skipped_root;
+ if (PathCchSkipRoot(wdir, &wdir_skipped_root) == S_OK) {
+ size = wcsrtombs(NULL, &wdir_skipped_root, 0, &(mbstate_t){0});
+ char *cursor = result->str + result->len;
+ g_string_set_size(result, result->len + size);
+ wcsrtombs(cursor, &wdir_skipped_root, size + 1, &(mbstate_t){0});
+ } else {
+ g_string_append(result, dir);
+ }
- /* Advance over common components. */
- len_dir = len_bindir = prefix_len;
- do {
- dir += len_dir;
- bindir += len_bindir;
- dir = next_component(dir, &len_dir);
- bindir = next_component(bindir, &len_bindir);
- } while (len_dir && len_dir == len_bindir && !memcmp(dir, bindir, len_dir));
-
- /* Ascend from bindir to the common prefix with dir. */
- while (len_bindir) {
- bindir += len_bindir;
- g_string_append(result, "/..");
- bindir = next_component(bindir, &len_bindir);
+ g_free(wdir);
+#else
+ g_string_append(result, dir);
+#endif
+ goto out;
}
- if (*dir) {
- assert(G_IS_DIR_SEPARATOR(dir[-1]));
- g_string_append(result, dir - 1);
+ if (IS_ENABLED(CONFIG_RELOCATABLE) &&
+ starts_with_prefix(dir) && starts_with_prefix(bindir)) {
+ g_string_assign(result, exec_dir);
+
+ /* Advance over common components. */
+ len_dir = len_bindir = prefix_len;
+ do {
+ dir += len_dir;
+ bindir += len_bindir;
+ dir = next_component(dir, &len_dir);
+ bindir = next_component(bindir, &len_bindir);
+ } while (len_dir && len_dir == len_bindir && !memcmp(dir, bindir, len_dir));
+
+ /* Ascend from bindir to the common prefix with dir. */
+ while (len_bindir) {
+ bindir += len_bindir;
+ g_string_append(result, "/..");
+ bindir = next_component(bindir, &len_bindir);
+ }
+
+ if (*dir) {
+ assert(G_IS_DIR_SEPARATOR(dir[-1]));
+ g_string_append(result, dir - 1);
+ }
+ goto out;
}
- return result->str;
+
+ g_string_assign(result, dir);
+out:
+ return g_string_free(result, false);
}
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