1GETRESUID(2) Linux Programmer's Manual GETRESUID(2)
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6 getresuid, getresgid - get real, effective and saved user or group ID
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9 #define _GNU_SOURCE
10 #include <unistd.h>
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12 int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid);
13 int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);
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16 getresuid() and getresgid() (both introduced in Linux 2.1.44) get the
17 real UID, effective UID, and saved set-user-ID (resp. group ID's) of
18 the current process.
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22 On success, zero is returned. On error, -1 is returned, and errno is
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26 EFAULT One of the arguments specified an address outside the calling
27 program's address space.
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30 These calls are non-standard; they also appear on HP-UX and some of the
31 BSDs.
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33 The prototype is given by glibc since version 2.3.2 provided
34 _GNU_SOURCE is defined.
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37 getuid(2), setresuid(2), setreuid(2), setuid(2), feature_test_macros(7)
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41Linux 2.4 2003-05-26 GETRESUID(2)