[PATCH] Make udev/udevstart be one binary

[elogind.git] / klibc_fixups.c

diff --git a/klibc_fixups.c b/klibc_fixups.c
index 927f2f649a671762c1943ef68189f768b73a8054..bbacfbdc75cf02ada93fa6cf9aed42c6a1667284 100644 (file)
--- a/klibc_fixups.c
+++ b/klibc_fixups.c
@@ -25,34 +25,51 @@
 #include <stdio.h>
 #include <string.h>
 #include <ctype.h>
+#include <fcntl.h>
 #include <sys/types.h>
 
+#include "udev.h"
 #include "klibc_fixups.h"
+#include "udev_lib.h"
 #include "logging.h"
 
 #define PW_FILE                "/etc/passwd"
 #define GR_FILE                "/etc/group"
+#define UTMP_FILE      "/var/run/utmp"
 
 /* return the id of a passwd style line, selected by the users name */
 static unsigned long get_id_by_name(const char *uname, const char *dbfile)
 {
        unsigned long id = -1;
-       FILE *file;
-       char buf[255];
+       char line[255];
+       char *buf;
+       size_t bufsize;
+       size_t cur;
+       size_t count;
        char *pos;
        char *name;
        char *idstr;
        char *tail;
 
-       file = fopen(dbfile, "r");
-       if (file == NULL) {
-               dbg("unable to open file '%s'", dbfile);
+       if (file_map(dbfile, &buf, &bufsize) == 0) {
+               dbg("reading '%s' as db file", dbfile);
+       } else {
+               dbg("can't open '%s' as db file", dbfile);
                return -1;
        }
 
+       /* loop through the whole file */
+
+       cur = 0;
        while (1) {
-               pos = fgets(buf, sizeof(buf), file);
-               if (pos == NULL)
+               count = buf_get_line(buf, bufsize, cur);
+
+               strncpy(line, buf + cur, count);
+               line[count] = '\0';
+               pos = line;
+
+               cur += count+1;
+               if (cur > bufsize)
                        break;
 
                /* get name */
@@ -71,7 +88,7 @@ static unsigned long get_id_by_name(const char *uname, const char *dbfile)
 
                if (strcmp(uname, name) == 0) {
                        id = strtoul(idstr, &tail, 10);
-                       if (tail == NULL)
+                       if (tail[0] != '\0')
                                id = -1;
                        else
                                dbg("id for '%s' is '%li'", name, id);
@@ -79,7 +96,7 @@ static unsigned long get_id_by_name(const char *uname, const char *dbfile)
                }
        }
 
-       fclose(file);
+       file_unmap(buf, bufsize);
        return id;
 }
 
@@ -107,4 +124,38 @@ struct group *getgrnam(const char *name)
                return &gr;
 }
 
+
+int ufd = -1;
+
+void setutent()
+{
+       if (ufd < 0)
+               ufd = open(UTMP_FILE, O_RDONLY);
+       fcntl(ufd, F_SETFD, FD_CLOEXEC);
+       lseek(ufd, 0, SEEK_SET);
+}
+
+void endutent() {
+       if (ufd < 0)
+               return;
+       close(ufd);
+       ufd = -1;
+}
+
+struct utmp *getutent(void)
+{
+       static struct utmp utmp;
+       int retval;
+
+       if (ufd < 0) {
+               setutent();
+               if (ufd < 0)
+                       return NULL;
+       }
+       retval = read(ufd, &utmp, sizeof(struct utmp));
+       if (retval < 1)
+               return NULL;
+       return &utmp;
+}
+
 #endif