8fcfb01a81
The copyrights of the source files were all out of date and were not the same format. This has been corrected. The source of the authors was examining the git log for each file. Signed-off-by: Craig Small <csmall@dropbear.xyz>
100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/*
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* pwcache.c - memory cache passwd file handling
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*
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* Copyright © 2011-2023 Jim Warner <james.warner@comcast.net>
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* Copyright © 2015-2023 Craig Small <csmall@dropbear.xyz>
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* Copyright © 2002 Albert Cahalan
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*
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* Older version:
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* Copyright © 1992-1998 Michael K. Johnson <johnsonm@redhat.com>
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* Note: most likely none of his code remains
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include <string.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 <grp.h>
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#include "pwcache.h"
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#include "procps-private.h"
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// might as well fill cache lines... else we waste memory anyway
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#define HASHSIZE 64 /* power of 2 */
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#define HASH(x) ((x) & (HASHSIZE - 1))
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static char ERRname[] = "?";
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static __thread struct pwbuf {
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struct pwbuf *next;
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uid_t uid;
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char name[P_G_SZ];
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} *pwhash[HASHSIZE];
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char *pwcache_get_user(uid_t uid) {
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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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if (!(*p = (struct pwbuf *)malloc(sizeof(struct pwbuf))))
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return ERRname;
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(*p)->uid = uid;
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pw = getpwuid(uid);
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if(!pw || strlen(pw->pw_name) >= P_G_SZ)
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sprintf((*p)->name, "%u", uid);
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else
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strcpy((*p)->name, 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 __thread struct grpbuf {
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struct grpbuf *next;
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gid_t gid;
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char name[P_G_SZ];
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} *grphash[HASHSIZE];
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char *pwcache_get_group(gid_t gid) {
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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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if (!(*g = (struct grpbuf *)malloc(sizeof(struct grpbuf))))
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return ERRname;;
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(*g)->gid = gid;
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gr = getgrgid(gid);
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if (!gr || strlen(gr->gr_name) >= P_G_SZ)
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sprintf((*g)->name, "%u", gid);
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else
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strcpy((*g)->name, 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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