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-rw-r--r--vppinfra/vppinfra/unix-misc.c207
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diff --git a/vppinfra/vppinfra/unix-misc.c b/vppinfra/vppinfra/unix-misc.c
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+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ Copyright (c) 2005 Eliot Dresselhaus
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include <vppinfra/error.h>
+#include <vppinfra/os.h>
+#include <vppinfra/unix.h>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/uio.h> /* writev */
+#include <fcntl.h>
+#include <stdio.h> /* for sprintf */
+
+clib_error_t * unix_file_n_bytes (char * file, uword * result)
+{
+ struct stat s;
+
+ if (stat (file, &s) < 0)
+ return clib_error_return_unix (0, "stat `%s'", file);
+
+ if (S_ISREG (s.st_mode))
+ *result = s.st_size;
+ else
+ *result = 0;
+
+ return /* no error */ 0;
+}
+
+clib_error_t * unix_file_read_contents (char * file, u8 * result, uword n_bytes)
+{
+ int fd = -1;
+ uword n_done, n_left;
+ clib_error_t * error = 0;
+ u8 * v = result;
+
+ if ((fd = open (file, 0)) < 0)
+ return clib_error_return_unix (0, "open `%s'", file);
+
+ n_left = n_bytes;
+ n_done = 0;
+ while (n_left > 0)
+ {
+ int n_read;
+ if ((n_read = read (fd, v + n_done, n_left)) < 0)
+ {
+ error = clib_error_return_unix (0, "open `%s'", file);
+ goto done;
+ }
+
+ /* End of file. */
+ if (n_read == 0)
+ break;
+
+ n_left -= n_read;
+ n_done += n_read;
+ }
+
+ if (n_left > 0)
+ {
+ error = clib_error_return (0, " `%s' expected to read %wd bytes; read only %wd",
+ file, n_bytes, n_bytes - n_left);
+ goto done;
+ }
+
+ done:
+ close (fd);
+ return error;
+}
+
+clib_error_t * unix_file_contents (char * file, u8 ** result)
+{
+ uword n_bytes;
+ clib_error_t * error = 0;
+ u8 * v;
+
+ if ((error = unix_file_n_bytes (file, &n_bytes)))
+ return error;
+
+ v = 0;
+ vec_resize (v, n_bytes);
+
+ error = unix_file_read_contents (file, v, n_bytes);
+
+ if (error)
+ vec_free (v);
+ else
+ *result = v;
+
+ return error;
+}
+
+clib_error_t * unix_proc_file_contents (char * file, u8 ** result)
+{
+ u8 *rv = 0;
+ uword pos;
+ int bytes, fd;
+
+ /* Unfortunately, stat(/proc/XXX) returns zero... */
+ fd = open (file, O_RDONLY);
+
+ if (fd < 0)
+ return clib_error_return_unix (0, "open `%s'", file);
+
+ vec_validate(rv, 4095);
+ pos = 0;
+ while (1)
+ {
+ bytes = read(fd, rv+pos, 4096);
+ if (bytes < 0)
+ {
+ close (fd);
+ vec_free (rv);
+ return clib_error_return_unix (0, "read '%s'", file);
+ }
+
+ if (bytes == 0)
+ {
+ _vec_len(rv) = pos;
+ break;
+ }
+ pos += bytes;
+ vec_validate(rv, pos+4095);
+ }
+ *result = rv;
+ close (fd);
+ return 0;
+}
+
+void os_panic (void) __attribute__ ((weak));
+
+void os_panic (void) { abort (); }
+
+void os_exit (int) __attribute__ ((weak));
+
+void os_exit (int code)
+{ exit (code); }
+
+void os_puts (u8 * string, uword string_length, uword is_error)
+ __attribute__ ((weak));
+
+void os_puts (u8 * string, uword string_length, uword is_error)
+{
+ clib_smp_main_t * m = &clib_smp_main;
+ int cpu = os_get_cpu_number ();
+ char buf[64];
+ int fd = is_error ? 2 : 1;
+ struct iovec iovs[2];
+ int n_iovs = 0;
+
+ if (m->n_cpus > 1)
+ {
+ snprintf (buf, sizeof(buf), "%d: ", cpu);
+
+ iovs[n_iovs].iov_base = buf;
+ iovs[n_iovs].iov_len = strlen (buf);
+ n_iovs++;
+ }
+
+ iovs[n_iovs].iov_base = string;
+ iovs[n_iovs].iov_len = string_length;
+ n_iovs++;
+
+ if (writev (fd, iovs, n_iovs) < 0)
+ ;
+}
+
+void os_out_of_memory (void) __attribute__ ((weak));
+void os_out_of_memory (void)
+{ os_panic (); }
+
+uword os_get_cpu_number (void) __attribute__ ((weak));
+uword os_get_cpu_number (void)
+{ return os_get_cpu_number_inline(); }