src/passwd/getpwent_a.c

   1 #include "pwf.h"
   2 #include <pthread.h>
   3
   4 static unsigned atou(char **s)
   5 {
   6         unsigned x;
   7         for (x=0; **s-'0'<10U; ++*s) x=10*x+(**s-'0');
   8         return x;
   9 }
  10
  11 int __getpwent_a(FILE *f, struct passwd *pw, char **line, size_t *size, struct passwd **res)
  12 {
  13         ssize_t l;
  14         char *s;
  15         int rv = 0;
  16         int cs;
  17         pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
  18         for (;;) {
  19                 if ((l=getline(line, size, f)) < 0) {
  20                         rv = ferror(f) ? errno : 0;
  21                         free(*line);
  22                         *line = 0;
  23                         pw = 0;
  24                         break;
  25                 }
  26                 line[0][l-1] = 0;
  27
  28                 s = line[0];
  29                 pw->pw_name = s++;
  30                 if (!(s = strchr(s, ':'))) continue;
  31
  32                 *s++ = 0; pw->pw_passwd = s;
  33                 if (!(s = strchr(s, ':'))) continue;
  34
  35                 *s++ = 0; pw->pw_uid = atou(&s);
  36                 if (*s != ':') continue;
  37
  38                 *s++ = 0; pw->pw_gid = atou(&s);
  39                 if (*s != ':') continue;
  40
  41                 *s++ = 0; pw->pw_gecos = s;
  42                 if (!(s = strchr(s, ':'))) continue;
  43
  44                 *s++ = 0; pw->pw_dir = s;
  45                 if (!(s = strchr(s, ':'))) continue;
  46
  47                 *s++ = 0; pw->pw_shell = s;
  48                 break;
  49         }
  50         pthread_setcancelstate(cs, 0);
  51         *res = pw;
  52         if (rv) errno = rv;
  53         return rv;
  54 }