Initial revision

libproc/pwcache.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <pwd.h>
+#include "proc/ps.h"
+
+#define	HASHSIZE	16			/* power of 2 */
+#define	HASH(x)		((x) & (HASHSIZE - 1))
+
+
+static struct pwbuf {
+    int uid;
+    char name[12];
+    struct pwbuf *next;
+} *pwhash[HASHSIZE];
+
+char *user_from_uid(int uid)
+{
+    struct pwbuf **p;
+    struct passwd *pw;
+
+    p = &pwhash[HASH(uid)];
+    while (*p) {
+	if ((*p)->uid == uid)
+	    return((*p)->name);
+	p = &(*p)->next;
+    }
+    *p = (struct pwbuf *) xmalloc(sizeof(struct pwbuf));
+    (*p)->uid = uid;
+    if ((pw = getpwuid(uid)) == NULL)
+	sprintf((*p)->name, "#%d", uid);
+    else
+	sprintf((*p)->name, "%-.8s", pw->pw_name);
+    (*p)->next = NULL;
+    return((*p)->name);
+}
+
+void bad_user_access_length() { }