mirror of https://github.com/ceph/go-ceph
53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
/*
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Package errutil provides common functions for dealing with error conditions for
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all ceph api wrappers.
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*/
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package errutil
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/* force XSI-complaint strerror_r() */
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// #define _POSIX_C_SOURCE 200112L
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// #undef _GNU_SOURCE
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// #include <stdlib.h>
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// #include <errno.h>
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// #include <string.h>
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import "C"
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import (
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"fmt"
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"unsafe"
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)
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// FormatErrno returns the absolute value of the errno as well as a string
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// describing the errno. The string will be empty is the errno is not known.
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func FormatErrno(errno int) (int, string) {
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buf := make([]byte, 1024)
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// strerror expects errno >= 0
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if errno < 0 {
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errno = -errno
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}
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ret := C.strerror_r(
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C.int(errno),
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(*C.char)(unsafe.Pointer(&buf[0])),
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C.size_t(len(buf)))
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if ret != 0 {
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return errno, ""
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}
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return errno, C.GoString((*C.char)(unsafe.Pointer(&buf[0])))
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}
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// FormatErrorCode returns a string that describes the supplied error source
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// and error code as a string. Suitable to use in Error() methods. If the
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// error code maps to an errno the string will contain a description of the
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// error. Otherwise the string will only indicate the source and value if the
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// value does not map to a known errno.
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func FormatErrorCode(source string, errValue int) string {
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_, s := FormatErrno(errValue)
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if s == "" {
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return fmt.Sprintf("%s: ret=%d", source, errValue)
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}
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return fmt.Sprintf("%s: ret=%d, %s", source, errValue, s)
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}
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