Fix #75696: posix_getgrnam fails to print details of group #3464
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According to the POSIX specification of `getgrnam_r()` the result of `sysconf(_SC_GETGR_R_SIZE_MAX)` is an initial value suggested for the size of the buffer, and `ERANGE` signals that insufficient storage was supplied. So if we get `ERANGE`, we try again with a buffer twice as big, and so on, instead of failing.
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Unless there'll be objections, I'm going to merge this on the next weekend. |
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Comment on behalf of cmb at php.net: Applied via 2677d43. |
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According to the POSIX specification of
getgrnam_r()the result ofsysconf(_SC_GETGR_R_SIZE_MAX)is an initial value suggested for thesize of the buffer, and
ERANGEsignals that insufficient storage wassupplied. So if we get
ERANGE, we try again with a buffer twice asbig, and so on, instead of failing.