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Add man pages for seteuid() and friends.

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Also add an overview page that explains the general concepts.
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Nico Weber 2020-06-30 15:32:10 -04:00 • committed by Andreas Kling
parent 9b4e6f6a23
commit 1f323076f0
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34
Base/usr/share/man/man2/getresuid.md Normal file
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## Name
getresuid, getresgid - get real, effective, and saved user / group ID
## Synopsis
```**c++
#include <unistd.h>
int getresuid(uid_t*, uid_t*, uid_t*);
int getresgid(gid_t*, gid_t*, gid_t*);
```
## Description
Returns the real, effective, and saved user or group ID.
## Return value
If the call was set successful, returns 0.
Else, returns -1 and sets `errno` to describe the error.
## Errors
* `EFAULT`: One of the passed pointers is not valid, writeable pointer in the current process.
## See also
* [`setuid_overview`(7)](../man7/setuid_overview.md)
* [`geteuid`(2) / `getegid`(2)](geteuid.md)
* [`getuid`(2) / `getgid`(2)](getuid.md)
* [`seteuid`(2) / `setegid`(2)](seteuid.md)
* [`setuid`(2) / `setgid`(2)](setuid.md)
* [`setresuid`(2) / `setresgid`(2)](setresuid.md)