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getpeerucred(3c) [opensolaris man page]

getpeerucred(3C)					   Standard C Library Functions 					  getpeerucred(3C)

NAME
getpeerucred - get connected socket or STREAM peer's credentials SYNOPSIS
#include <ucred.h> int getpeerucred(int fd, ucred_t **ucred); DESCRIPTION
The getpeerucred() function returns the credentials of the peer endpoint of a connection-oriented socket (SOCK_STREAM) or STREAM fd at the time the endpoint was created or the connection was established. A process that initiates a connection retrieves the credentials of its peer at the time the peer's endpoint was created. A process that listens for connections retrieves the credentials of the peer at the time the peer initiated the connection. When successful, getpeerucred() stores the pointer to a freshly allocated ucred_t in the memory location pointed to by the ucred argument if that memory location contains the null pointer. If the memory location is non-null, it will reuse the existing ucred_t. When ucred is no longer needed, a credential allocated by getpeerucred() should be freed with ucred_free(3C). It is possible that all fields of the ucred_t are not available to all peer endpoints and all callers. RETURN VALUES
Upon successful completion, getpeerucred() returns 0. Otherwise, it returns -1 and errno is set to indicate the error. ERRORS
The getpeerucred() function will fail if: EAGAIN There is not enough memory available to allocate sufficient memory to hold the user credential. The application can try again later. EBADF The fd argument is not a valid file descriptor. EFAULT The pointer location pointed to by the ucred_t ** argument points to an invalid, non-null address. EINVAL The socket is connected but the peer credentials are unknown. ENOMEM The physical limits of the system are exceeded by the memory allocation needed to hold the user credential. ENOTCONN The socket or STREAM is not connected or the STREAM's peer is unknown. ENOTSUP This operation is not supported on this file descriptor. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
door_ucred(3C), ucred_get(3C), attributes(5), connld(7M) NOTES
The system currently supports both sides of connection endpoints for local AF_UNIX, AF_INET, and AF_INET6 sockets, /dev/tcp, /dev/ticots, and /dev/ticotsord XTI/TLI connections, and pipe file descriptors sent using I_SENDFD as a result of the open of a named pipe with the "connld" module pushed. SunOS 5.11 26 May 2004 getpeerucred(3C)

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ucred_get(3C)						   Standard C Library Functions 					     ucred_get(3C)

NAME
ucred_get, ucred_free, ucred_geteuid, ucred_getruid, ucred_getsuid, ucred_getegid, ucred_getrgid, ucred_getsgid, ucred_getgroups, ucred_getprivset, ucred_getpid, ucred_getprojid, ucred_getzoneid, ucred_getpflags, ucred_getlabel, ucred_size - user credential functions SYNOPSIS
#include <ucred.h> ucred_t *ucred_get(pid_t pid); void ucred_free(ucred_t *uc); uid_t ucred_geteuid(const ucred_t *uc); uid_t ucred_getruid(const ucred_t *uc); uid_t ucred_getsuid(const ucred_t *uc); gid_t ucred_getegid(const ucred_t *uc); gid_t ucred_getrgid(const ucred_t *uc); gid_t ucred_getsgid(const ucred_t *uc); int ucred_getgroups(const ucred_t *uc, const gid_t **groups); const priv_set_t *ucred_getprivset(const ucred_t *uc, priv_ptype_t set); pid_t ucred_getpid(const ucred_t *uc); projid_t ucred_getprojid(const ucred_t *uc); zoneid_t ucred_getzoneid(const ucred_t *uc); uint_t ucred_getpflags(const ucred_t *uc, uint_t flags); m_label_t *ucred_getlabel(const ucred_t *uc); size_t ucred_size(void); DESCRIPTION
These functions return or act on a user credential, ucred_t. User credentials are returned by various functions and describe the creden- tials of a process. Information about the process can then be obtained by calling the access functions. Access functions can fail if the underlying mechanism did not return sufficient information. The ucred_get() function returns the user credential of the specified pid or NULL if none can be obtained. A pid value of P_MYID returns information about the calling process. The return value is dynamically allocated and must be freed using ucred_free(). The ucred_geteuid(), ucred_getruid(), ucred_getsuid(), ucred_getegid(), ucred_getrgid(), and ucred_getsgid() functions return the effective UID, real UID, saved UID, effective GID, real GID, saved GID, respectively, or -1 if the user credential does not contain sufficient infor- mation. The ucred_getgroups() function stores a pointer to the group list in the gid_t * pointed to by the second argument and returns the number of groups in the list. It returns -1 if the information is not available. The returned group list is valid until ucred_free() is called on the user credential given as argument. The ucred_getpid() function returns the process ID of the process or -1 if the process ID is not available. The process ID returned in a user credential is only guaranteed to be correct in a very limited number of cases when returned by door_ucred(3C) and ucred_get(). In all other cases, the process in question might have handed of the file descriptor, the process might have exited or executed another program, or the process ID might have been reused by a completely unrelated process after the original program exited. The ucred_getprojid() function returns the project ID of the process or -1 if the project ID is not available. The ucred_getzoneid() function returns the zone ID of the process or -1 if the zone ID is not available. The ucred_getprivset() function returns the specified privilege set specified as second argument, or NULL if either the requested informa- tion is not available or the privilege set name is invalid. The returned privilege set is valid until ucred_free() is called on the speci- fied user credential. The ucred_getpflags() function returns the value of the specified privilege flags from the ucred structure, or (uint_t)-1 if none was present. The ucred_getlabel() function returns the value of the label, or NULL if the label is not available. The returned label is valid until ucred_free() is called on the specified user credential. This function is available only if the system is configured with Trusted Exten- sions. The ucred_free() function frees the memory allocated for the specified user credential. The ucred_size() function returns sizeof(ucred_t). This value is constant only until the next boot, at which time it could change. The ucred_size() function can be used to determine the size of the buffer needed to receive a credential option with SO_RECVUCRED. See socket.h(3HEAD). RETURN VALUES
See DESCRIPTION. ERRORS
The ucred_get() function will fail if: EAGAIN There is not enough memory available to allocate sufficient memory to hold a user credential. The application can try again later. EACCES The caller does not have sufficient privileges to examine the target process. EMFILE The calling process cannot open any more files. ENFILE ENOMEM The physical limits of the system are exceeded by the memory allocation needed to hold a user credential. ESRCH The target process does not exist. The ucred_getprivset() function will fail if: EINVAL The privilege set argument is invalid. The ucred_getlabel() function will fail if: EINVAL The label is not present. The ucred_geteuid(), ucred_getruid(), ucred_getsuid(), ucred_getegid(), ucred_getrgid(), ucred_getsgid(), ucred_getgroups(), ucred_getpflags(), ucred_getprivset(), ucred_getprojid(), ucred_getpid(), and ucred_getlabel() functions will fail if: EINVAL The requested user credential attribute is not available in the specified user credential. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
getpflags(2), getppriv(2), door_ucred(3C), getpeerucred(3C), priv_set(3C), socket.h(3HEAD), attributes(5), labels(5), privileges(5) SunOS 5.11 4 Apr 2008 ucred_get(3C)
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