#ifdef HAVE_SETRESUID
return setresuid(-1, euid, -1);
#else
-# error "You need a seteuid function"
+ errno = ENOSYS;
+ return -1;
#endif
}
#endif
#ifdef HAVE_SETRESGID
return setresgid(-1, egid, -1);
#else
-# error "You need a setegid function"
+ errno = ENOSYS;
+ return -1;
#endif
}
#endif
return NULL;
}
#endif
+
+
+#ifndef HAVE_MEMMEM
+void *rep_memmem(const void *haystack, size_t haystacklen,
+ const void *needle, size_t needlelen)
+{
+ if (needlelen == 0) {
+ return discard_const(haystack);
+ }
+ while (haystacklen >= needlelen) {
+ char *p = (char *)memchr(haystack, *(const char *)needle,
+ haystacklen-(needlelen-1));
+ if (!p) return NULL;
+ if (memcmp(p, needle, needlelen) == 0) {
+ return p;
+ }
+ haystack = p+1;
+ haystacklen -= (p - (const char *)haystack) + 1;
+ }
+ return NULL;
+}
+#endif
+
+#ifndef HAVE_VDPRINTF
+int vdprintf(int fd, const char *format, va_list ap)
+{
+ char *s = NULL;
+ int ret;
+
+ vasprintf(&s, format, ap);
+ if (s == NULL) {
+ errno = ENOMEM;
+ return -1;
+ }
+ ret = write(fd, s, strlen(s));
+ free(s);
+ return ret;
+}
+#endif
+
+#ifndef HAVE_DPRINTF
+int dprintf(int fd, const char *format, ...)
+{
+ int ret;
+ va_list ap;
+
+ va_start(ap, format);
+ ret = vdprintf(fd, format, ap);
+ va_end(ap);
+
+ return ret;
+}
+#endif
+