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cmd/cgo: error in example #5095

tebeka opened this issue Mar 21, 2013 · 3 comments


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commented Mar 21, 2013

The docs at say:

Any C function that returns a value may be called in a multiple assignment context to
retrieve both the return value and the C errno variable as an error. For example:

n, err := C.atoi("abc")


This has two errors:
1. Need to wrap "abc" in C.CString
2. atoi does not set errno (at least on Linux), strtol does

I suggest to change the example to
    // Will generate error since base 100 is too large
    n, err := C.strtol(C.CString("10"), nil, 100)

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commented Mar 21, 2013

Comment 1:

sure, feel free to mail a CL.

Labels changed: added priority-later, go1.1, removed priority-triage.

Status changed to Accepted.


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Contributor Author

commented Mar 21, 2013


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commented Mar 23, 2013

Comment 3:

Fixed by

Status changed to Fixed.

@tebeka tebeka added fixed labels Mar 23, 2013

@rsc rsc added this to the Go1.1 milestone Apr 14, 2015

@rsc rsc removed the go1.1 label Apr 14, 2015

@golang golang locked and limited conversation to collaborators Jun 24, 2016

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