diff options
Diffstat (limited to 'src/cmd/vendor/golang.org/x/sys/unix/syscall_linux.go')
-rw-r--r-- | src/cmd/vendor/golang.org/x/sys/unix/syscall_linux.go | 62 |
1 files changed, 58 insertions, 4 deletions
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/syscall_linux.go b/src/cmd/vendor/golang.org/x/sys/unix/syscall_linux.go index 4bc5baf77d..5f28f8fded 100644 --- a/src/cmd/vendor/golang.org/x/sys/unix/syscall_linux.go +++ b/src/cmd/vendor/golang.org/x/sys/unix/syscall_linux.go @@ -14,6 +14,7 @@ package unix import ( "encoding/binary" "syscall" + "time" "unsafe" ) @@ -131,8 +132,10 @@ func Pipe2(p []int, flags int) error { } var pp [2]_C_int err := pipe2(&pp, flags) - p[0] = int(pp[0]) - p[1] = int(pp[1]) + if err == nil { + p[0] = int(pp[0]) + p[1] = int(pp[1]) + } return err } @@ -247,6 +250,13 @@ func Getwd() (wd string, err error) { if n < 1 || n > len(buf) || buf[n-1] != 0 { return "", EINVAL } + // In some cases, Linux can return a path that starts with the + // "(unreachable)" prefix, which can potentially be a valid relative + // path. To work around that, return ENOENT if path is not absolute. + if buf[0] != '/' { + return "", ENOENT + } + return string(buf[0 : n-1]), nil } @@ -2312,11 +2322,56 @@ type RemoteIovec struct { //sys shmdt(addr uintptr) (err error) //sys shmget(key int, size int, flag int) (id int, err error) +//sys getitimer(which int, currValue *Itimerval) (err error) +//sys setitimer(which int, newValue *Itimerval, oldValue *Itimerval) (err error) + +// MakeItimerval creates an Itimerval from interval and value durations. +func MakeItimerval(interval, value time.Duration) Itimerval { + return Itimerval{ + Interval: NsecToTimeval(interval.Nanoseconds()), + Value: NsecToTimeval(value.Nanoseconds()), + } +} + +// A value which may be passed to the which parameter for Getitimer and +// Setitimer. +type ItimerWhich int + +// Possible which values for Getitimer and Setitimer. +const ( + ItimerReal ItimerWhich = ITIMER_REAL + ItimerVirtual ItimerWhich = ITIMER_VIRTUAL + ItimerProf ItimerWhich = ITIMER_PROF +) + +// Getitimer wraps getitimer(2) to return the current value of the timer +// specified by which. +func Getitimer(which ItimerWhich) (Itimerval, error) { + var it Itimerval + if err := getitimer(int(which), &it); err != nil { + return Itimerval{}, err + } + + return it, nil +} + +// Setitimer wraps setitimer(2) to arm or disarm the timer specified by which. +// It returns the previous value of the timer. +// +// If the Itimerval argument is the zero value, the timer will be disarmed. +func Setitimer(which ItimerWhich, it Itimerval) (Itimerval, error) { + var prev Itimerval + if err := setitimer(int(which), &it, &prev); err != nil { + return Itimerval{}, err + } + + return prev, nil +} + /* * Unimplemented */ // AfsSyscall -// Alarm // ArchPrctl // Brk // ClockNanosleep @@ -2332,7 +2387,6 @@ type RemoteIovec struct { // GetMempolicy // GetRobustList // GetThreadArea -// Getitimer // Getpmsg // IoCancel // IoDestroy |