75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/***********************************************************************\
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* Copyright (C) 1992-1998 by Michael K. Johnson, johnsonm@redhat.com *
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* *
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* This file is placed under the conditions of the GNU Library *
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* General Public License, version 2, or any later version. *
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* See file ../COPYING for information on distribution conditions. *
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\***********************************************************************/
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#include <stdio.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <pwd.h>
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#include "proc/procps.h"
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#include <grp.h>
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#define HASHSIZE 16 /* power of 2 */
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#define HASH(x) ((x) & (HASHSIZE - 1))
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#define NAMESIZE 16
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#define NAMELENGTH "15"
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static struct pwbuf {
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uid_t uid;
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char name[NAMESIZE];
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struct pwbuf *next;
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} *pwhash[HASHSIZE];
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char *user_from_uid(uid_t uid)
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{
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struct pwbuf **p;
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struct passwd *pw;
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p = &pwhash[HASH(uid)];
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while (*p) {
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if ((*p)->uid == uid)
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return((*p)->name);
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p = &(*p)->next;
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}
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*p = (struct pwbuf *) xmalloc(sizeof(struct pwbuf));
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(*p)->uid = uid;
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if ((pw = getpwuid(uid)) == NULL)
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sprintf((*p)->name, "#%d", uid);
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else
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sprintf((*p)->name, "%-." NAMELENGTH "s", pw->pw_name);
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(*p)->next = NULL;
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return((*p)->name);
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}
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static struct grpbuf {
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gid_t gid;
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char name[NAMESIZE];
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struct grpbuf *next;
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} *grphash[HASHSIZE];
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char *group_from_gid(gid_t gid)
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{
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struct grpbuf **g;
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struct group *gr;
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g = &grphash[HASH(gid)];
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while (*g) {
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if ((*g)->gid == gid)
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return((*g)->name);
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g = &(*g)->next;
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}
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*g = (struct grpbuf *) malloc(sizeof(struct grpbuf));
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(*g)->gid = gid;
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if ((gr = getgrgid(gid)) == NULL)
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sprintf((*g)->name, "#%d", gid);
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else
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sprintf((*g)->name, "%-." NAMELENGTH "s", gr->gr_name);
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(*g)->next = NULL;
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return((*g)->name);
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}
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