NAME
getresuid, getresgid - get real, effective and saved user/group IDs
SYNOPSIS
#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <unistd.h> int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid); int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);
DESCRIPTION
getresuid() returns the real UID, the effective UID, and the saved set- user-ID of the calling process, in the arguments ruid, euid, and suid, respectively. getresgid() performs the analogous task for the process's group IDs.
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS
EFAULT One of the arguments specified an address outside the calling program's address space.
VERSIONS
These system calls appeared on Linux starting with kernel 2.1.44. The prototypes are given by glibc since version 2.3.2, provided _GNU_SOURCE is defined.
CONFORMING TO
These calls are nonstandard; they also appear on HP-UX and some of the BSDs.
NOTES
The original Linux getresuid() and getresgid() system calls supported only 16-bit user and group IDs. Subsequently, Linux 2.4 added getresuid32() and getresgid32(), supporting 32-bit IDs. The glibc getresuid() and getresgid() wrapper functions transparently deal with the variations across kernel versions.
SEE ALSO
getuid(2), setresuid(2), setreuid(2), setuid(2), credentials(7)
COLOPHON
This page is part of release 4.09 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
More Linux Commands
manpages/HeightMMOfScreen.3.html
HeightMMOfScreen(3) - screen information functions and macro
The BlackPixelOfScreen macro returns the black pixel value of the specified screen. The WhitePixelOfScreen macro returns the white pixel value of the specified
manpages/tolower.3.html
tolower(3) - convert letter to upper or lower case (ManPage)
These functions convert lowercase letters to uppercase, and vice versa. If c is a lowercase letter, toupper() returns its uppercase equivalent, if an uppercase
manpages/gimp-2.6.1.html
gimp-2.6(1) - an image manipulation and paint program.......
gimp-2.6.1 - GIMP is the GNU Image Manipulation Program. It is used to edit and manipulate images. It can load and save a variety of image formats and can be us
manpages/kmag.1.html
kmag(1) - Screen magnifier (Commands - Linux manual page)...
kmag, also known as KMagnifier is a screen magnifier. You can use KMagnifier to magnify a part of the screen just as you would use a lens to magnify a newspaper
manpages/pcre32_pattern_to_host_byte_order.3.html
pcre32_pattern_to_host_byte_order(3) Perl-compatible regular
This function ensures that the bytes in 2-byte and 4-byte values in a compiled pattern are in the correct order for the current host. It is useful when a patter
manpages/ckpasswd.8.html
ckpasswd(8) - nnrpd password authenticator - Linux man page
ckpasswd is the basic password authenticator for nnrpd, suitable for being run from an auth stanza in readers.conf. See readers.conf(5) for more information on
manpages/gxl2gv.1.html
gxl2gv(1) - GXL-GV converters (Commands - Linux man page)...
gxl2gv converts between graphs represented in GXL and in the GV language. Unless a conversion type is specified using a flag, gxl2gv will deduce the type of con
manpages/curl_easy_perform.3.html
curl_easy_perform(3) - Perform a file transfer (Man Page)...
This function is called after the init and all the curl_easy_setopt(3) calls are made, and will perform the transfer as described in the options. It must be cal
manpages/version.1ssl.html
version(1ssl) - print OpenSSL version information (ManPage)
This command is used to print out version information about OpenSSL. OPTIONS -a all information, this is the same as setting all the other flags. -v the current
manpages/glGetPixelMapusv.3gl.html
glGetPixelMapusv(3gl) - return the specified pixel map......
See the glPixelMap reference page for a description of the acceptable values for the map parameter. glGetPixelMap returns in values the contents of the pixel ma
manpages/Apache::TestRun.3pm.html
Apache::TestRun(3pm) - Run the test suite - Linux man page
The Apache::TestRun package controls the configuration and running of the test suite. METHODS Several methods are sub-classable, if the default behavior should
manpages/rundig.1.html
rundig(1) - sample script to create a search database for ht
rundig is a sample script to create a search database for the ht://Dig search engine. OPTIONS -v Verbose mode. This increases the verbosity of the program. -a U
