24ec0d73b5
- introduce new call numbers, names, and field aliases; - initialize request messages to zero for all ABI calls; - format callnr.h in the same way as com.h; - redo call tables in both servers; - remove param.h namespace pollution in the servers; - make brk(2) go to VM directly, rather than through PM; - remove obsolete BRK, UTIME, and WAIT calls; - clean up path copying routine in VFS; - move remaining system calls from libminlib to libc; - correct some errno-related mistakes in libc routines. Change-Id: I2d8ec5d061cd7e0b30c51ffd77aa72ebf84e2565
76 lines
1.1 KiB
C
76 lines
1.1 KiB
C
#include "syslib.h"
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#include <string.h>
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#include <unistd.h>
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#include <sys/ucred.h>
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static pid_t
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getepinfo(endpoint_t proc_ep, uid_t *uid, gid_t *gid)
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{
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message m;
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int r;
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memset(&m, 0, sizeof(m));
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m.PM_GETEPINFO_ENDPT = proc_ep;
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if ((r = _taskcall(PM_PROC_NR, PM_GETEPINFO, &m)) < 0)
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return r;
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if (uid != NULL)
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*uid = m.PM_GETEPINFO_UID;
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if (gid != NULL)
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*gid = m.PM_GETEPINFO_GID;
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return (pid_t) r;
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}
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pid_t
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getnpid(endpoint_t proc_ep)
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{
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return getepinfo(proc_ep, NULL, NULL);
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}
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uid_t
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getnuid(endpoint_t proc_ep)
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{
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uid_t uid;
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int r;
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if ((r = getepinfo(proc_ep, &uid, NULL)) < 0)
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return (uid_t) r;
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return uid;
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}
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gid_t
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getngid(endpoint_t proc_ep)
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{
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gid_t gid;
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int r;
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if ((r = getepinfo(proc_ep, NULL, &gid)) < 0)
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return (gid_t) r;
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return gid;
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}
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int
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getnucred(endpoint_t proc_ep, struct uucred *ucred)
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{
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uid_t uid;
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gid_t gid;
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int r;
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if (ucred == NULL)
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return EFAULT;
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if ((r = getepinfo(proc_ep, &uid, &gid)) < 0)
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return r;
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/* Only two fields are used for now; ensure the rest is zeroed out. */
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memset(ucred, 0, sizeof(struct uucred));
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ucred->cr_uid = uid;
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ucred->cr_gid = gid;
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return r;
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}
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