Return the numeric effective user ID of the current process. See also posix_getpwuid() for information on how to convert this into a useable username.
Example 1. posix_geteuid() example This example will show the current user id then set the effective user id to a separate id using posix_seteuid(), then show the difference between the real id and the effective id.
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posix_getpwuid() for more information about the user. |
posix_getuid() get real user id. |
posix_setuid() change the effective user id |
POSIX man page GETEUID(2) |