More conveninet way to unformat file by providing filesystem path.
Takes format string for easier constuction of path...
Type: improvement
Change-Id: I433204fa20dc98e2b11c53914883d047a7fc62c6
Signed-off-by: Damjan Marion <damarion@cisco.com>
return format (s, "unknown (family 0x%02x model 0x%02x)", family, model);
#elif __aarch64__
- int fd;
unformat_input_t input;
u32 implementer, primary_part_number, variant, revision;
- fd = open ("/proc/cpuinfo", 0);
- if (fd < 0)
- return format (s, "unknown");
-
- unformat_init_clib_file (&input, fd);
- while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT)
+ if (unformat_init_file (&input, "/proc/cpuinfo"))
{
- if (unformat (&input, "CPU implementer%_: 0x%x", &implementer))
- ;
- else if (unformat (&input, "CPU part%_: 0x%x", &primary_part_number))
- ;
- else if (unformat (&input, "CPU variant%_: 0x%x", &variant))
- ;
- else if (unformat (&input, "CPU revision%_: %u", &revision))
- ;
- else
- unformat_skip_line (&input);
+ while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (&input, "CPU implementer%_: 0x%x", &implementer))
+ ;
+ else if (unformat (&input, "CPU part%_: 0x%x", &primary_part_number))
+ ;
+ else if (unformat (&input, "CPU variant%_: 0x%x", &variant))
+ ;
+ else if (unformat (&input, "CPU revision%_: %u", &revision))
+ ;
+ else
+ unformat_skip_line (&input);
+ }
+ unformat_free (&input);
}
- unformat_free (&input);
- close (fd);
+ else
+ return format (s, "unknown");
#define _(i,p,a,c,_format) if ((implementer == i) && (primary_part_number == p)){ \
if (_format)\
(and argument). */
uword (*fill_buffer) (struct _unformat_input_t * i);
- /* Return values for fill buffer function which indicate whether not
- input has been exhausted. */
+ /* User's function to be called on input_free */
+ void (*free) (struct _unformat_input_t *i);
+
+ /* Return values for fill buffer function which indicate whether not
+ input has been exhausted. */
#define UNFORMAT_END_OF_INPUT (~0)
#define UNFORMAT_MORE_INPUT 0
always_inline void
unformat_free (unformat_input_t * i)
{
+ if (i->free)
+ i->free (i);
vec_free (i->buffer);
vec_free (i->buffer_marks);
clib_memset (i, 0, sizeof (i[0]));
/* Setup input from Unix file. */
void unformat_init_clib_file (unformat_input_t * input, int file_descriptor);
+/* Setup input from flesystem path. */
+uword unformat_init_file (unformat_input_t *input, char *fmt, ...);
+
/* Take input from Unix environment variable; returns
1 if variable exists zero otherwise. */
uword unformat_init_unix_env (unformat_input_t * input, char *var);
{
f64 cpu_freq = 1e9; /* better than 40... */
f64 ppc_timebase = 0; /* warnings be gone */
- int fd;
unformat_input_t input;
/* $$$$ aarch64 kernel doesn't report "cpu MHz" */
#endif
cpu_freq = 0;
- fd = open ("/proc/cpuinfo", 0);
- if (fd < 0)
- return cpu_freq;
-
- unformat_init_clib_file (&input, fd);
ppc_timebase = 0;
- while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT)
+ if (unformat_init_file (&input, "/proc/cpuinfo"))
{
- if (unformat (&input, "cpu MHz : %f", &cpu_freq))
- cpu_freq *= 1e6;
- else if (unformat (&input, "timebase : %f", &ppc_timebase))
- ;
- else
- unformat_skip_line (&input);
- }
-
- unformat_free (&input);
+ while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (&input, "cpu MHz : %f", &cpu_freq))
+ cpu_freq *= 1e6;
+ else if (unformat (&input, "timebase : %f", &ppc_timebase))
+ ;
+ else
+ unformat_skip_line (&input);
+ }
- close (fd);
+ unformat_free (&input);
+ }
+ else
+ return cpu_freq;
/* Override CPU frequency with time base for PPC. */
if (ppc_timebase != 0)
clock_frequency_from_sys_filesystem (void)
{
f64 cpu_freq = 0.0;
- int fd;
unformat_input_t input;
/* Time stamp always runs at max frequency. */
cpu_freq = 0;
- fd = open ("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq", 0);
- if (fd < 0)
- goto done;
-
- unformat_init_clib_file (&input, fd);
- (void) unformat (&input, "%f", &cpu_freq);
- cpu_freq *= 1e3; /* measured in kHz */
- unformat_free (&input);
- close (fd);
-done:
+
+ if (unformat_init_file (
+ &input, "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq"))
+ {
+ if (unformat (&input, "%f", &cpu_freq))
+ cpu_freq *= 1e3; /* measured in kHz */
+ unformat_free (&input);
+ }
+
return cpu_freq;
}
*/
#include <vppinfra/format.h>
+#include <fcntl.h>
/* Call user's function to fill input buffer. */
__clib_export uword
return input->index;
}
+static void
+unformat_close_fd (unformat_input_t *input)
+{
+ int fd = pointer_to_uword (input->fill_buffer_arg);
+ close (fd);
+}
+
__clib_export void
unformat_init_clib_file (unformat_input_t * input, int file_descriptor)
{
uword_to_pointer (file_descriptor, void *));
}
+__clib_export uword
+unformat_init_file (unformat_input_t *input, char *fmt, ...)
+{
+ va_list va;
+ u8 *path;
+ int fd;
+
+ va_start (va, fmt);
+ path = va_format (0, fmt, &va);
+ va_end (va);
+ vec_add1 (path, 0);
+
+ fd = open ((char *) path, 0);
+ vec_free (path);
+
+ if (fd >= 0)
+ {
+ unformat_init (input, clib_file_fill_buffer,
+ uword_to_pointer (fd, void *));
+ input->free = unformat_close_fd;
+ return 1;
+ }
+ return 0;
+}
+
/* Take input from Unix environment variable. */
uword
unformat_init_unix_env (unformat_input_t * input, char *var)