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2019-11-26Changed the group listing to run unprivileged when possible.Tiago Natel1-0/+16
Now the nxt_user_groups_get() function uses getgrouplist(3) when available (except MacOS, see below). For some platforms, getgrouplist() supports a method of probing how much groups the user has but the behavior is not consistent. The method used here consists of optimistically trying to get up to min(256, NGROUPS_MAX) groups; only if ngroups returned exceeds the original value, we do a second call. This method can block main's process if LDAP/NDIS+ is in use. MacOS has getgrouplist(3) but it's buggy. It doesn't update ngroups if the value passed is smaller than the number of groups the user has. Some projects (like Go stdlib) call getgrouplist() in a loop, increasing ngroups until it exceeds the number of groups user belongs to or fail when a limit is reached. For performance reasons, this is to be avoided and MacOS is handled in the fallback implementation. The fallback implementation is the old Unit approach. It saves main's user groups (getgroups(2)) and then calls initgroups(3) to load application's groups in main, then does a second getgroups(2) to store the gids and restore main's groups in the end. Because of initgroups(3)' call to setgroups(2), this method requires root capabilities. In the case of OSX, which has small NGROUPS_MAX by default (16), it's not possible to restore main's groups if it's large; if so, this method fallbacks again: user_cred gids aren't stored, and the worker process calls initgroups() itself and may block for some time if LDAP/NDIS+ is in use.
2019-11-22Configure: fixed posix_spawn() detection with glic 2.30.Sergey Kandaurov1-2/+2
In particular, it was previously broken on Ubuntu 19.10 and Fedora 31. See for details: https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=2ab5741
2018-07-16Added getentropy() support.Sergey Kandaurov1-0/+43
Prodded by David Carlier.
2018-07-16Supplied getrandom() test with commentary about supported OSes.Sergey Kandaurov1-1/+1
2018-05-24Using getrandom() libc interface, SYS_getrandom fixes.Sergey Kandaurov1-4/+30
The interface is available since Glibc 2.25, and FreeBSD 12.0.
2017-08-17The new module configuration interface.Igor Sysoev1-1/+5
Configuration and building example: ./configure ./configure python ./configure php ./configure go make all or ./configure make nginext ./configure python make python ./configure php make php ./configure go make go Modules configuration options and building examples: ./configure python --module=python2 --config=python2.7-config make python2 ./configure php --module=php7 --config=php7.0-config --lib-path=/usr/local/php7.0 make php7 ./configure go --go=go1.6 --go-path=${HOME}/go1.6 make go1.6
2017-07-14Restored arc4random unit test after 59fc46dd5e1d.Ruslan Ermilov1-16/+0
2017-01-17Initial version.Igor Sysoev1-0/+153