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notifyme's Issues

Capture stdout from running process

Capture stdout from running process and send two type of notifications, a pool of this stdout and when is finished.

This example capture stdout from pt-online-schema-change

strace -p24240 -s64 -e trace=write 2>&1 | grep Copying

Error about OOM

Trace:

fatal error: runtime: out of memory

runtime stack:
runtime.throw(0x693472, 0x16)
        /usr/local/go/src/runtime/panic.go:616 +0x81
runtime.sysMap(0xc440200000, 0x20000000, 0x0, 0x810d98)
        /usr/local/go/src/runtime/mem_linux.go:216 +0x20a
runtime.(*mheap).sysAlloc(0x7f7d60, 0x20000000, 0x0)
        /usr/local/go/src/runtime/malloc.go:470 +0xd4
runtime.(*mheap).grow(0x7f7d60, 0x10000, 0x0)
        /usr/local/go/src/runtime/mheap.go:907 +0x60
runtime.(*mheap).allocSpanLocked(0x7f7d60, 0x10000, 0x810da8, 0xc420001980)
        /usr/local/go/src/runtime/mheap.go:820 +0x301
runtime.(*mheap).alloc_m(0x7f7d60, 0x10000, 0xffffffffffff0101, 0xc420107f10)
        /usr/local/go/src/runtime/mheap.go:686 +0x118
runtime.(*mheap).alloc.func1()
        /usr/local/go/src/runtime/mheap.go:753 +0x4d
runtime.(*mheap).alloc(0x7f7d60, 0x10000, 0xc420010101, 0x43189f)
        /usr/local/go/src/runtime/mheap.go:752 +0x8a
runtime.largeAlloc(0x1ffffe00, 0x7fb930e10101, 0x431001)
        /usr/local/go/src/runtime/malloc.go:826 +0x94
runtime.mallocgc.func1()
        /usr/local/go/src/runtime/malloc.go:721 +0x46
runtime.systemstack(0x0)
        /usr/local/go/src/runtime/asm_amd64.s:409 +0x79
runtime.mstart()
        /usr/local/go/src/runtime/proc.go:1175

goroutine 8 [running]:
runtime.systemstack_switch()
        /usr/local/go/src/runtime/asm_amd64.s:363 fp=0xc42004aca0 sp=0xc42004ac98 pc=0x451ef0
runtime.mallocgc(0x1ffffe00, 0x62e080, 0xc440121501, 0xc42004ad78)
        /usr/local/go/src/runtime/malloc.go:720 +0x8a2 fp=0xc42004ad40 sp=0xc42004aca0 pc=0x40faf2
runtime.makeslice(0x62e080, 0x1ffffe00, 0x1ffffe00, 0x4a61ba, 0xc42000c058, 0xc4401215c1)
        /usr/local/go/src/runtime/slice.go:61 +0x77 fp=0xc42004ad70 sp=0xc42004ad40 pc=0x43e707
bytes.makeSlice(0x1ffffe00, 0x0, 0x0, 0x0)
        /usr/local/go/src/bytes/buffer.go:230 +0x6d fp=0xc42004adb0 sp=0xc42004ad70 pc=0x4668cd
bytes.(*Buffer).grow(0xc420112000, 0x200, 0xe83f)
        /usr/local/go/src/bytes/buffer.go:144 +0x151 fp=0xc42004ae00 sp=0xc42004adb0 pc=0x466281
bytes.(*Buffer).ReadFrom(0xc420112000, 0x6bf860, 0xc42000c058, 0x7fb930e18030, 0xc420112000, 0x1)
        /usr/local/go/src/bytes/buffer.go:204 +0x48 fp=0xc42004ae70 sp=0xc42004ae00 pc=0x4666e8
io.copyBuffer(0x6bf3c0, 0xc420112000, 0x6bf860, 0xc42000c058, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
        /usr/local/go/src/io/io.go:386 +0x31a fp=0xc42004aee0 sp=0xc42004ae70 pc=0x45e0fa
io.Copy(0x6bf3c0, 0xc420112000, 0x6bf860, 0xc42000c058, 0x0, 0x0, 0x0)
        /usr/local/go/src/io/io.go:362 +0x5a fp=0xc42004af40 sp=0xc42004aee0 pc=0x45dd9a
os/exec.(*Cmd).writerDescriptor.func1(0x0, 0x0)
        /usr/local/go/src/os/exec/exec.go:275 +0x4d fp=0xc42004afa0 sp=0xc42004af40 pc=0x600fbd
os/exec.(*Cmd).Start.func1(0xc4200a49a0, 0xc4200d6280)
        /usr/local/go/src/os/exec/exec.go:396 +0x27 fp=0xc42004afd0 sp=0xc42004afa0 pc=0x601037
runtime.goexit()
        /usr/local/go/src/runtime/asm_amd64.s:2361 +0x1 fp=0xc42004afd8 sp=0xc42004afd0 pc=0x4548c1
created by os/exec.(*Cmd).Start
        /usr/local/go/src/os/exec/exec.go:395 +0x5df

goroutine 1 [syscall]:
syscall.Syscall6(0xf7, 0x1, 0x78d6, 0xc420045a48, 0x1000004, 0x0, 0x0, 0x0, 0xc420034400, 0x0)
        /usr/local/go/src/syscall/asm_linux_amd64.s:44 +0x5
os.(*Process).blockUntilWaitable(0xc4200144e0, 0x0, 0x0, 0x3)
        /usr/local/go/src/os/wait_waitid.go:31 +0x98
os.(*Process).wait(0xc4200144e0, 0xc42005ecf0, 0xc4200a4a78, 0xc4200a4a78)
        /usr/local/go/src/os/exec_unix.go:22 +0x3c
os.(*Process).Wait(0xc4200144e0, 0x6a19b0, 0x6a19b8, 0x6a19a8)
        /usr/local/go/src/os/exec.go:123 +0x2b
os/exec.(*Cmd).Wait(0xc4200a49a0, 0x0, 0x0)
        /usr/local/go/src/os/exec/exec.go:461 +0x5c
os/exec.(*Cmd).Run(0xc4200a49a0, 0xc42006c230, 0x2)
        /usr/local/go/src/os/exec/exec.go:305 +0x5c
os/exec.(*Cmd).Output(0xc4200a49a0, 0x4, 0xc420045cc0, 0x2, 0x2, 0xc4200a49a0)
        /usr/local/go/src/os/exec/exec.go:500 +0xf5
main.exec_command(0xc420108090, 0x81, 0xc420045eb8, 0x1, 0x1)
        /Users/swapbyt3s/go/src/github.com/swapbyt3s/notifyme/main.go:107 +0x97
main.main()
        /Users/swapbyt3s/go/src/github.com/swapbyt3s/notifyme/main.go:61 +0x2be

goroutine 5 [syscall]:
os/signal.signal_recv(0x0)
        /usr/local/go/src/runtime/sigqueue.go:139 +0xa6
os/signal.loop()
        /usr/local/go/src/os/signal/signal_unix.go:22 +0x22
created by os/signal.init.0
        /usr/local/go/src/os/signal/signal_unix.go:28 +0x41

goroutine 6 [select, locked to thread]:
runtime.gopark(0x6a1d40, 0x0, 0x68ef37, 0x6, 0x18, 0x1)
        /usr/local/go/src/runtime/proc.go:291 +0x11a
runtime.selectgo(0xc420032750, 0xc42001c1e0)
        /usr/local/go/src/runtime/select.go:392 +0xe50
runtime.ensureSigM.func1()
        /usr/local/go/src/runtime/signal_unix.go:549 +0x1f4
runtime.goexit()
        /usr/local/go/src/runtime/asm_amd64.s:2361 +0x1

goroutine 7 [chan receive]:
main.wait_for_interrupt.func1(0xc420054120)
        /Users/swapbyt3s/go/src/github.com/swapbyt3s/notifyme/main.go:95 +0x38
created by main.wait_for_interrupt
        /Users/swapbyt3s/go/src/github.com/swapbyt3s/notifyme/main.go:94 +0xed

goroutine 9 [IO wait]:
internal/poll.runtime_pollWait(0x7fb930e17d60, 0x72, 0xc420033d58)
        /usr/local/go/src/runtime/netpoll.go:173 +0x57
internal/poll.(*pollDesc).wait(0xc42006c388, 0x72, 0xffffffffffffff01, 0x6c0160, 0x7bc190)
        /usr/local/go/src/internal/poll/fd_poll_runtime.go:85 +0x9b
internal/poll.(*pollDesc).waitRead(0xc42006c388, 0xc420114001, 0x8000, 0x8000)
        /usr/local/go/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc42006c370, 0xc420114000, 0x8000, 0x8000, 0x0, 0x0, 0x0)
        /usr/local/go/src/internal/poll/fd_unix.go:157 +0x17d
os.(*File).read(0xc42000c070, 0xc420114000, 0x8000, 0x8000, 0x0, 0x0, 0x0)
        /usr/local/go/src/os/file_unix.go:226 +0x4e
os.(*File).Read(0xc42000c070, 0xc420114000, 0x8000, 0x8000, 0x5f, 0x0, 0x0)
        /usr/local/go/src/os/file.go:107 +0x6a
io.copyBuffer(0x6bf940, 0xc42006c230, 0x6bf860, 0xc42000c070, 0xc420114000, 0x8000, 0x8000, 0x0, 0x0, 0x0)
        /usr/local/go/src/io/io.go:400 +0x164
io.Copy(0x6bf940, 0xc42006c230, 0x6bf860, 0xc42000c070, 0x0, 0x0, 0x0)
        /usr/local/go/src/io/io.go:362 +0x5a
os/exec.(*Cmd).writerDescriptor.func1(0x0, 0x0)
        /usr/local/go/src/os/exec/exec.go:275 +0x4d
os/exec.(*Cmd).Start.func1(0xc4200a49a0, 0xc4200d62c0)
        /usr/local/go/src/os/exec/exec.go:396 +0x27
created by os/exec.(*Cmd).Start
        /usr/local/go/src/os/exec/exec.go:395 +0x5df

Daemonize process

The idea is to not use tmux or screen tools to leave in backgroud this process.

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