[#absl-DisableFlagfileAndEnvParsing]
= xref:absl.adoc[absl]::DisableFlagfileAndEnvParsing
:relfileprefix: ../
:mrdocs:

Disables the processing of flags that load values from secondary sources, specifically `‐‐flagfile`, `‐‐fromenv`, and `‐‐tryfromenv`. When disabled, occurrences of these flags on the command line are skipped without opening files or inspecting environment variables, and a warning is printed to stderr. Direct command‐line flags passed via argv are still parsed normally.

== Synopsis

Declared in `<absl/flags/parse.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
DisableFlagfileAndEnvParsing();
----

== Description

This is primarily intended as a security precaution for privileged or setuid processes parsing untrusted command lines prior to dropping privileges.

Should only be called in `main()` before calling `absl::ParseCommandLine()` or `absl::ParseAbseilFlagsOnly()`.


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