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Current POSIX standard requires fork() to be async-signal safe. Neither our implementation, nor implementations in other operating systems are, and practically it is impossible to make fork() async-signal safe without too much efforts. Also, that would put undue requirement that all atfork handlers should be async-signal safe as well, which contradicts its main use. As result, Austin Group dropped the requirement, and added a new function _Fork() that should be async-signal safe, but it does not call atfork handlers. Basically, _Fork() can be implemented as a raw syscall. Release of glibc 2.34 added _Fork(), do the same for FreeBSD. Clarify threading behavior for fork() in the manpage. Reviewed by: markj Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D31378 |
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| arm | ||
| capability | ||
| compat-43 | ||
| db | ||
| gdtoa | ||
| gen | ||
| gmon | ||
| i386 | ||
| iconv | ||
| include | ||
| inet | ||
| isc | ||
| locale | ||
| md | ||
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| nameser | ||
| net | ||
| nls | ||
| posix1e | ||
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| powerpcspe | ||
| quad | ||
| regex | ||
| resolv | ||
| riscv | ||
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| secure | ||
| softfloat | ||
| stdio | ||
| stdlib | ||
| stdtime | ||
| string | ||
| sys | ||
| tests | ||
| uuid | ||
| x86 | ||
| xdr | ||
| yp | ||
| libc_nossp.ldscript | ||
| libc.ldscript | ||
| Makefile | ||
| Makefile.depend | ||
| Makefile.depend.options | ||
| Versions.def | ||