#include "util.h"
#include <errno.h>
#include <limits.h>
+#include <pthread.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
/* --version option output. */
static char *program_version;
+/* Buffer used by ovs_strerror(). */
+DEFINE_PER_THREAD_DATA(struct { char s[128]; }, strerror_buffer, { "" });
+
void
ovs_assert_failure(const char *where, const char *function,
const char *condition)
const char *
ovs_retval_to_string(int retval)
{
- static char unknown[48];
+ return (!retval ? ""
+ : retval == EOF ? "End of file"
+ : ovs_strerror(retval));
+}
- if (!retval) {
- return "";
- }
- if (retval > 0) {
- return strerror(retval);
- }
- if (retval == EOF) {
- return "End of file";
+const char *
+ovs_strerror(int error)
+{
+ enum { BUFSIZE = sizeof strerror_buffer_get()->s };
+ int save_errno;
+ char *buffer;
+ char *s;
+
+ save_errno = errno;
+ buffer = strerror_buffer_get()->s;
+
+#if STRERROR_R_CHAR_P
+ /* GNU style strerror_r() might return an immutable static string, or it
+ * might write and return 'buffer', but in either case we can pass the
+ * returned string directly to the caller. */
+ s = strerror_r(error, buffer, BUFSIZE);
+#else /* strerror_r() returns an int. */
+ s = buffer;
+ if (strerror_r(error, buffer, BUFSIZE)) {
+ /* strerror_r() is only allowed to fail on ERANGE (because the buffer
+ * is too short). We don't check the actual failure reason because
+ * POSIX requires strerror_r() to return the error but old glibc
+ * (before 2.13) returns -1 and sets errno. */
+ snprintf(buffer, BUFSIZE, "Unknown error %d", error);
}
- snprintf(unknown, sizeof unknown, "***unknown return value: %d***", retval);
- return unknown;
+#endif
+
+ errno = save_errno;
+
+ return s;
}
/* Sets global "program_name" and "program_version" variables. Should
void ovs_error_valist(int err_no, const char *format, va_list)
PRINTF_FORMAT(2, 0);
const char *ovs_retval_to_string(int);
+const char *ovs_strerror(int);
void ovs_hex_dump(FILE *, const void *, size_t, uintptr_t offset, bool ascii);
bool str_to_int(const char *, int base, int *);