setresuid(2)setresuid(2)NAME
setresuid, setresgid - set real, effective, and saved user and group
IDs
SYNOPSISDESCRIPTION
sets the real, effective and/or saved user ID of the calling process.
If the current real, effective or saved user ID is equal to that of a
user having appropriate privileges, sets the real, effective and saved
user IDs to ruid, euid, and suid, respectively. Otherwise, only sets
the real, effective, and saved user IDs if ruid, euid, and suid each
match at least one of the current real, effective, or saved user IDs.
If ruid, euid, or suid is leaves the current real, effective or saved
user ID unchanged.
sets the real, effective and/or saved group ID of the calling process.
If the current real, effective or saved user ID is equal to that of a
user having appropriate privileges, sets the real, effective, and saved
group ID to rgid, egid, and sgid, respectively. Otherwise, only sets
the real, effective and saved group ID if rgid, egid, and sgid each
match at least one of the current real, effective or saved group ID.
If rgid, egid, or sgid is leaves the current real, effective or saved
group ID unchanged.
Security Restrictions
Some or all of the actions associated with this system call require the
privilege (CHSUBJIDENT). Processes owned by the superuser will have
this privilege. Processes owned by other users may have this privi‐
lege, depending on system configuration.
See privileges(5) for more information about privileged access on sys‐
tems that support fine-grained privileges.
RETURN VALUE
Upon successful completion, and return 0; otherwise, they return −1 and
set to indicate the error.
ERRORS
and fail if any of the following conditions are encountered:
ruid, euid, or suid (rgid, egid, or sgid) is not a
valid user (group) ID.
None of the conditions above are met.
AUTHOR
and were developed by HP.
SEE ALSOexec(2), getuid(2), setuid(2), privileges(5).
setresuid(2)