98c0c5e9e6
The URLs of the form `help://man/<section>/<page>` link to another help page inside the help application. All previous relative page links are replaced by this new form. This doesn't change any behavior but it looks much nicer :^) Note that man doesn't handle these new links, but the previous relative links didn't work either.
39 lines
1 KiB
Markdown
39 lines
1 KiB
Markdown
## Name
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seteuid, setegid - set effective user / group ID
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## Synopsis
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```**c++
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#include <unistd.h>
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int seteuid(uid_t);
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int setegid(gid_t);
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```
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## Description
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Sets the effective user or group ID.
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For non-superusers, the effective ID can only be set to the current real or saved ID.
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In particular, `seteuid(geteuid())` will fail if the current effective user ID is not equal to the current real or saved ID.
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## Return value
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If the call was set successful, returns 0.
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Otherwise, returns -1 and sets `errno` to describe the error.
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## Errors
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* `EPERM`: The new ID is not equal to the real ID or saved ID, and the user is not superuser.
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* `EINVAL`: The new ID is set to invalid value (-1).
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## See also
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* [`setuid_overview`(7)](help://man/7/setuid_overview)
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* [`geteuid`(2) / `getegid`(2)](help://man/2/geteuid)
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* [`getuid`(2) / `getgid`(2)](help://man/2/getuid)
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* [`getresuid`(2) / `getresgid`(2)](help://man/2/getresuid)
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* [`setuid`(2) / `setgid`(2)](help://man/2/setuid)
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* [`setresuid`(2) / `setresgid`(2)](help://man/2/setresuid)
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