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strings.Split(s, sep) returns a slice of a single element containing s if sep is not found in s. This is true even if s is empty. As a result, every call to flagFromEnvOrFile results in an attempt to open a file with empty name. This is seen from strace as [pid 3287620] openat(AT_FDCWD, "", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 3287620] openat(AT_FDCWD, "", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) ... To fix, check if the string is empty before calling ReadFile. This also fixes cases where filePath is non-empty but has extra commas. Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com> (cherry picked from commit 3df9a3c) Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
meatballhat
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Apr 22, 2022
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and again as @urfave/cli hopefully 🤞🏼
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What type of PR is this?
What this PR does / why we need it:
strings.Split(s, sep)returns a slice of a single element containing sif sep is not found in s. This is true even if s is empty.
As a result, every call to flagFromEnvOrFile results in an attempt to
open a file with empty name. This is seen from strace as
To fix, check if the string is empty before calling ReadFile.
This also fixes cases where filePath is non-empty but has extra commas.
Which issue(s) this PR fixes:
none
Special notes for your reviewer:
This is a backport of #1336 to v1 branch.
Testing
Due to the obvious nature of the fix, no additional testing is required.
Release Notes