/* vi: set sw=4 ts=4: */
-/* `time' utility to display resource usage of processes.
+/* 'time' utility to display resource usage of processes.
Copyright (C) 1990, 91, 92, 93, 96 Free Software Foundation, Inc.
Licensed under GPL version 2, see file LICENSE in this tarball for details.
Heavily modified for busybox by Erik Andersen <andersen@codepoet.org>
*/
-#include "busybox.h"
-
-#define TV_MSEC tv_usec / 1000
+#include "libbb.h"
/* Information on the resources used by a child process. */
typedef struct {
int waitstatus;
struct rusage ru;
- struct timeval start, elapsed; /* Wallclock time of process. */
+ unsigned elapsed_ms; /* Wallclock time of process. */
} resource_t;
/* msec = milliseconds = 1/1,000 (1*10e-3) second.
usec = microseconds = 1/1,000,000 (1*10e-6) second. */
-#ifndef TICKS_PER_SEC
-#define TICKS_PER_SEC 100
-#endif
-
-/* The number of milliseconds in one `tick' used by the `rusage' structure. */
-#define MSEC_PER_TICK (1000 / TICKS_PER_SEC)
-
-/* Return the number of clock ticks that occur in M milliseconds. */
-#define MSEC_TO_TICKS(m) ((m) / MSEC_PER_TICK)
-
#define UL unsigned long
-static const char *const default_format = "real\t%E\nuser\t%u\nsys\t%T";
+static const char default_format[] ALIGN1 = "real\t%E\nuser\t%u\nsys\t%T";
/* The output format for the -p option .*/
-static const char *const posix_format = "real %e\nuser %U\nsys %S";
-
+static const char posix_format[] ALIGN1 = "real %e\nuser %U\nsys %S";
/* Format string for printing all statistics verbosely.
Keep this output to 24 lines so users on terminals can see it all.*/
-static const char *const long_format =
+static const char long_format[] ALIGN1 =
"\tCommand being timed: \"%C\"\n"
"\tUser time (seconds): %U\n"
"\tSystem time (seconds): %S\n"
"\tPage size (bytes): %Z\n"
"\tExit status: %x";
-
/* Wait for and fill in data on child process PID.
Return 0 on error, 1 if ok. */
-
/* pid_t is short on BSDI, so don't try to promote it. */
-static int resuse_end(pid_t pid, resource_t * resp)
+static void resuse_end(pid_t pid, resource_t *resp)
{
- int status;
-
pid_t caught;
/* Ignore signals, but don't ignore the children. When wait3
returns the child process, set the time the command finished. */
- while ((caught = wait3(&status, 0, &resp->ru)) != pid) {
- if (caught == -1)
- return 0;
- }
-
- gettimeofday(&resp->elapsed, (struct timezone *) 0);
- resp->elapsed.tv_sec -= resp->start.tv_sec;
- if (resp->elapsed.tv_usec < resp->start.tv_usec) {
- /* Manually carry a one from the seconds field. */
- resp->elapsed.tv_usec += 1000000;
- --resp->elapsed.tv_sec;
+ while ((caught = wait3(&resp->waitstatus, 0, &resp->ru)) != pid) {
+ if (caught == -1 && errno != EINTR) {
+ bb_perror_msg("wait");
+ return;
+ }
}
- resp->elapsed.tv_usec -= resp->start.tv_usec;
-
- resp->waitstatus = status;
-
- return 1;
+ resp->elapsed_ms = (monotonic_us() / 1000) - resp->elapsed_ms;
}
-/* Print ARGV, with each entry in ARGV separated by FILLER. */
-static void printargv(char *const *argv, const char *filler)
+static void printargv(char *const *argv)
{
- fputs(*argv, stdout);
- while (*++argv) {
- fputs(filler, stdout);
- fputs(*argv, stdout);
- }
+ const char *fmt = " %s" + 1;
+ do {
+ printf(fmt, *argv);
+ fmt = " %s";
+ } while (*++argv);
}
/* Return the number of kilobytes corresponding to a number of pages PAGES.
This is funky since the pagesize could be less than 1K.
Note: Some machines express getrusage statistics in terms of K,
others in terms of pages. */
-
-static unsigned long ptok(unsigned long pages)
+static unsigned long ptok(const unsigned pagesize, const unsigned long pages)
{
- static unsigned long ps;
unsigned long tmp;
- /* Initialization. */
- if (ps == 0)
- ps = getpagesize();
-
/* Conversion. */
- if (pages > (LONG_MAX / ps)) { /* Could overflow. */
- tmp = pages / 1024; /* Smaller first, */
- return tmp * ps; /* then larger. */
+ if (pages > (LONG_MAX / pagesize)) { /* Could overflow. */
+ tmp = pages / 1024; /* Smaller first, */
+ return tmp * pagesize; /* then larger. */
}
/* Could underflow. */
- tmp = pages * ps; /* Larger first, */
- return tmp / 1024; /* then smaller. */
+ tmp = pages * pagesize; /* Larger first, */
+ return tmp / 1024; /* then smaller. */
}
/* summarize: Report on the system use of a command.
COMMAND is the command and args that are being summarized.
RESP is resource information on the command. */
-static void summarize(const char *fmt, char **command, resource_t * resp)
+#ifndef TICKS_PER_SEC
+#define TICKS_PER_SEC 100
+#endif
+
+static void summarize(const char *fmt, char **command, resource_t *resp)
{
- unsigned long r; /* Elapsed real milliseconds. */
- unsigned long v; /* Elapsed virtual (CPU) milliseconds. */
+ unsigned vv_ms; /* Elapsed virtual (CPU) milliseconds */
+ unsigned cpu_ticks; /* Same, in "CPU ticks" */
+ unsigned pagesize = getpagesize();
+ /* Impossible: we do not use WUNTRACED flag in wait()...
if (WIFSTOPPED(resp->waitstatus))
- printf("Command stopped by signal %d\n",
+ printf("Command stopped by signal %u\n",
WSTOPSIG(resp->waitstatus));
- else if (WIFSIGNALED(resp->waitstatus))
- printf("Command terminated by signal %d\n",
+ else */
+ if (WIFSIGNALED(resp->waitstatus))
+ printf("Command terminated by signal %u\n",
WTERMSIG(resp->waitstatus));
else if (WIFEXITED(resp->waitstatus) && WEXITSTATUS(resp->waitstatus))
- printf("Command exited with non-zero status %d\n",
+ printf("Command exited with non-zero status %u\n",
WEXITSTATUS(resp->waitstatus));
- /* Convert all times to milliseconds. Occasionally, one of these values
- comes out as zero. Dividing by zero causes problems, so we first
- check the time value. If it is zero, then we take `evasive action'
- instead of calculating a value. */
-
- r = resp->elapsed.tv_sec * 1000 + resp->elapsed.tv_usec / 1000;
+ vv_ms = (resp->ru.ru_utime.tv_sec + resp->ru.ru_stime.tv_sec) * 1000
+ + (resp->ru.ru_utime.tv_usec + resp->ru.ru_stime.tv_usec) / 1000;
- v = resp->ru.ru_utime.tv_sec * 1000 + resp->ru.ru_utime.TV_MSEC +
- resp->ru.ru_stime.tv_sec * 1000 + resp->ru.ru_stime.TV_MSEC;
-
- /* putchar() != putc(stdout) in glibc! */
+#if (1000 / TICKS_PER_SEC) * TICKS_PER_SEC == 1000
+ /* 1000 is exactly divisible by TICKS_PER_SEC (typical) */
+ cpu_ticks = vv_ms / (1000 / TICKS_PER_SEC);
+#else
+ cpu_ticks = vv_ms * (unsigned long long)TICKS_PER_SEC / 1000;
+#endif
+ if (!cpu_ticks) cpu_ticks = 1; /* we divide by it, must be nonzero */
while (*fmt) {
/* Handle leading literal part */
/* Usually we optimize for size, but there is a limit
* for everything. With this we do a lot of 1-byte writes */
default:
- putc(*fmt, stdout);
+ bb_putchar(*fmt);
break;
#endif
/* Our format strings do not have these */
/* and we do not take format str from user */
default:
- putc('%', stdout);
+ bb_putchar('%');
/*FALLTHROUGH*/
case '%':
if (!*fmt) goto ret;
- putc(*fmt, stdout);
+ bb_putchar(*fmt);
break;
#endif
case 'C': /* The command that got timed. */
- printargv(command, " ");
+ printargv(command);
break;
case 'D': /* Average unshared data size. */
printf("%lu",
- MSEC_TO_TICKS(v) == 0 ? 0 :
- ptok((UL) resp->ru.ru_idrss) / MSEC_TO_TICKS(v) +
- ptok((UL) resp->ru.ru_isrss) / MSEC_TO_TICKS(v));
- break;
- case 'E': /* Elapsed real (wall clock) time. */
- if (resp->elapsed.tv_sec >= 3600) /* One hour -> h:m:s. */
- printf("%ldh %ldm %02lds",
- resp->elapsed.tv_sec / 3600,
- (resp->elapsed.tv_sec % 3600) / 60,
- resp->elapsed.tv_sec % 60);
+ (ptok(pagesize, (UL) resp->ru.ru_idrss) +
+ ptok(pagesize, (UL) resp->ru.ru_isrss)) / cpu_ticks);
+ break;
+ case 'E': { /* Elapsed real (wall clock) time. */
+ unsigned seconds = resp->elapsed_ms / 1000;
+ if (seconds >= 3600) /* One hour -> h:m:s. */
+ printf("%uh %um %02us",
+ seconds / 3600,
+ (seconds % 3600) / 60,
+ seconds % 60);
else
- printf("%ldm %ld.%02lds", /* -> m:s. */
- resp->elapsed.tv_sec / 60,
- resp->elapsed.tv_sec % 60,
- resp->elapsed.tv_usec / 10000);
+ printf("%um %u.%02us", /* -> m:s. */
+ seconds / 60,
+ seconds % 60,
+ (unsigned)(resp->elapsed_ms / 10) % 100);
break;
+ }
case 'F': /* Major page faults. */
- printf("%ld", resp->ru.ru_majflt);
+ printf("%lu", resp->ru.ru_majflt);
break;
case 'I': /* Inputs. */
- printf("%ld", resp->ru.ru_inblock);
+ printf("%lu", resp->ru.ru_inblock);
break;
case 'K': /* Average mem usage == data+stack+text. */
printf("%lu",
- MSEC_TO_TICKS(v) == 0 ? 0 :
- ptok((UL) resp->ru.ru_idrss) / MSEC_TO_TICKS(v) +
- ptok((UL) resp->ru.ru_isrss) / MSEC_TO_TICKS(v) +
- ptok((UL) resp->ru.ru_ixrss) / MSEC_TO_TICKS(v));
+ (ptok(pagesize, (UL) resp->ru.ru_idrss) +
+ ptok(pagesize, (UL) resp->ru.ru_isrss) +
+ ptok(pagesize, (UL) resp->ru.ru_ixrss)) / cpu_ticks);
break;
case 'M': /* Maximum resident set size. */
- printf("%lu", ptok((UL) resp->ru.ru_maxrss));
+ printf("%lu", ptok(pagesize, (UL) resp->ru.ru_maxrss));
break;
case 'O': /* Outputs. */
- printf("%ld", resp->ru.ru_oublock);
+ printf("%lu", resp->ru.ru_oublock);
break;
case 'P': /* Percent of CPU this job got. */
/* % cpu is (total cpu time)/(elapsed time). */
- if (r > 0)
- printf("%lu%%", (v * 100 / r));
+ if (resp->elapsed_ms > 0)
+ printf("%u%%", (unsigned)(vv_ms * 100 / resp->elapsed_ms));
else
printf("?%%");
break;
case 'R': /* Minor page faults (reclaims). */
- printf("%ld", resp->ru.ru_minflt);
+ printf("%lu", resp->ru.ru_minflt);
break;
case 'S': /* System time. */
- printf("%ld.%02ld",
- resp->ru.ru_stime.tv_sec,
- resp->ru.ru_stime.TV_MSEC / 10);
+ printf("%u.%02u",
+ (unsigned)resp->ru.ru_stime.tv_sec,
+ (unsigned)(resp->ru.ru_stime.tv_usec / 10000));
break;
case 'T': /* System time. */
if (resp->ru.ru_stime.tv_sec >= 3600) /* One hour -> h:m:s. */
- printf("%ldh %ldm %02lds",
- resp->ru.ru_stime.tv_sec / 3600,
- (resp->ru.ru_stime.tv_sec % 3600) / 60,
- resp->ru.ru_stime.tv_sec % 60);
+ printf("%uh %um %02us",
+ (unsigned)(resp->ru.ru_stime.tv_sec / 3600),
+ (unsigned)(resp->ru.ru_stime.tv_sec % 3600) / 60,
+ (unsigned)(resp->ru.ru_stime.tv_sec % 60));
else
- printf("%ldm %ld.%02lds", /* -> m:s. */
- resp->ru.ru_stime.tv_sec / 60,
- resp->ru.ru_stime.tv_sec % 60,
- resp->ru.ru_stime.tv_usec / 10000);
+ printf("%um %u.%02us", /* -> m:s. */
+ (unsigned)(resp->ru.ru_stime.tv_sec / 60),
+ (unsigned)(resp->ru.ru_stime.tv_sec % 60),
+ (unsigned)(resp->ru.ru_stime.tv_usec / 10000));
break;
case 'U': /* User time. */
- printf("%ld.%02ld",
- resp->ru.ru_utime.tv_sec,
- resp->ru.ru_utime.TV_MSEC / 10);
+ printf("%u.%02u",
+ (unsigned)resp->ru.ru_utime.tv_sec,
+ (unsigned)(resp->ru.ru_utime.tv_usec / 10000));
break;
case 'u': /* User time. */
if (resp->ru.ru_utime.tv_sec >= 3600) /* One hour -> h:m:s. */
- printf("%ldh %ldm %02lds",
- resp->ru.ru_utime.tv_sec / 3600,
- (resp->ru.ru_utime.tv_sec % 3600) / 60,
- resp->ru.ru_utime.tv_sec % 60);
+ printf("%uh %um %02us",
+ (unsigned)(resp->ru.ru_utime.tv_sec / 3600),
+ (unsigned)(resp->ru.ru_utime.tv_sec % 3600) / 60,
+ (unsigned)(resp->ru.ru_utime.tv_sec % 60));
else
- printf("%ldm %ld.%02lds", /* -> m:s. */
- resp->ru.ru_utime.tv_sec / 60,
- resp->ru.ru_utime.tv_sec % 60,
- resp->ru.ru_utime.tv_usec / 10000);
+ printf("%um %u.%02us", /* -> m:s. */
+ (unsigned)(resp->ru.ru_utime.tv_sec / 60),
+ (unsigned)(resp->ru.ru_utime.tv_sec % 60),
+ (unsigned)(resp->ru.ru_utime.tv_usec / 10000));
break;
case 'W': /* Times swapped out. */
- printf("%ld", resp->ru.ru_nswap);
+ printf("%lu", resp->ru.ru_nswap);
break;
case 'X': /* Average shared text size. */
- printf("%lu",
- MSEC_TO_TICKS(v) == 0 ? 0 :
- ptok((UL) resp->ru.ru_ixrss) / MSEC_TO_TICKS(v));
+ printf("%lu", ptok(pagesize, (UL) resp->ru.ru_ixrss) / cpu_ticks);
break;
case 'Z': /* Page size. */
- printf("%d", getpagesize());
+ printf("%u", pagesize);
break;
case 'c': /* Involuntary context switches. */
- printf("%ld", resp->ru.ru_nivcsw);
+ printf("%lu", resp->ru.ru_nivcsw);
break;
case 'e': /* Elapsed real time in seconds. */
- printf("%ld.%02ld",
- resp->elapsed.tv_sec, resp->elapsed.tv_usec / 10000);
+ printf("%u.%02u",
+ (unsigned)resp->elapsed_ms / 1000,
+ (unsigned)(resp->elapsed_ms / 10) % 100);
break;
case 'k': /* Signals delivered. */
- printf("%ld", resp->ru.ru_nsignals);
+ printf("%lu", resp->ru.ru_nsignals);
break;
case 'p': /* Average stack segment. */
- printf("%lu",
- MSEC_TO_TICKS(v) == 0 ? 0 :
- ptok((UL) resp->ru.ru_isrss) / MSEC_TO_TICKS(v));
+ printf("%lu", ptok(pagesize, (UL) resp->ru.ru_isrss) / cpu_ticks);
break;
case 'r': /* Incoming socket messages received. */
- printf("%ld", resp->ru.ru_msgrcv);
+ printf("%lu", resp->ru.ru_msgrcv);
break;
case 's': /* Outgoing socket messages sent. */
- printf("%ld", resp->ru.ru_msgsnd);
+ printf("%lu", resp->ru.ru_msgsnd);
break;
case 't': /* Average resident set size. */
- printf("%lu",
- MSEC_TO_TICKS(v) == 0 ? 0 :
- ptok((UL) resp->ru.ru_idrss) / MSEC_TO_TICKS(v));
+ printf("%lu", ptok(pagesize, (UL) resp->ru.ru_idrss) / cpu_ticks);
break;
case 'w': /* Voluntary context switches. */
- printf("%ld", resp->ru.ru_nvcsw);
+ printf("%lu", resp->ru.ru_nvcsw);
break;
case 'x': /* Exit status. */
- printf("%d", WEXITSTATUS(resp->waitstatus));
+ printf("%u", WEXITSTATUS(resp->waitstatus));
break;
}
break;
case '\\': /* Format escape. */
switch (*++fmt) {
default:
- putc('\\', stdout);
+ bb_putchar('\\');
/*FALLTHROUGH*/
case '\\':
if (!*fmt) goto ret;
- putc(*fmt, stdout);
+ bb_putchar(*fmt);
break;
case 't':
- putc('\t', stdout);
+ bb_putchar('\t');
break;
case 'n':
- putc('\n', stdout);
+ bb_putchar('\n');
break;
}
break;
++fmt;
}
/* ret: */
- putc('\n', stdout);
+ bb_putchar('\n');
}
/* Run command CMD and return statistics on it.
Put the statistics in *RESP. */
-static void run_command(char *const *cmd, resource_t * resp)
+static void run_command(char *const *cmd, resource_t *resp)
{
pid_t pid; /* Pid of child. */
- __sighandler_t interrupt_signal, quit_signal;
+ void (*interrupt_signal)(int);
+ void (*quit_signal)(int);
- gettimeofday(&resp->start, (struct timezone *) 0);
+ resp->elapsed_ms = monotonic_us() / 1000;
pid = vfork(); /* Run CMD as child process. */
if (pid < 0)
- bb_error_msg_and_die("cannot fork");
- else if (pid == 0) { /* If child. */
+ bb_perror_msg_and_die("fork");
+ if (pid == 0) { /* If child. */
/* Don't cast execvp arguments; that causes errors on some systems,
versus merely warnings if the cast is left off. */
- execvp(cmd[0], cmd);
- bb_error_msg("cannot run %s", cmd[0]);
- _exit(errno == ENOENT ? 127 : 126);
+ BB_EXECVP(cmd[0], cmd);
+ xfunc_error_retval = (errno == ENOENT ? 127 : 126);
+ bb_error_msg_and_die("cannot run %s", cmd[0]);
}
/* Have signals kill the child but not self (if possible). */
+//TODO: just block all sigs? and reenable them in the very end in main?
interrupt_signal = signal(SIGINT, SIG_IGN);
quit_signal = signal(SIGQUIT, SIG_IGN);
- if (resuse_end(pid, resp) == 0)
- bb_error_msg("error waiting for child process");
+ resuse_end(pid, resp);
/* Re-enable signals. */
signal(SIGINT, interrupt_signal);
signal(SIGQUIT, quit_signal);
}
-int time_main(int argc, char **argv);
-int time_main(int argc, char **argv)
+int time_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int time_main(int argc UNUSED_PARAM, char **argv)
{
resource_t res;
const char *output_format = default_format;
- char c;
-
- goto next;
- /* Parse any options -- don't use getopt() here so we don't
- * consume the args of our client application... */
- while (argc > 0 && argv[0][0] == '-') {
- while ((c = *++*argv)) {
- switch (c) {
- case 'v':
- output_format = long_format;
- break;
- case 'p':
- output_format = posix_format;
- break;
- default:
- bb_show_usage();
- }
- }
- next:
- argv++;
- argc--;
- if (!argc)
- bb_show_usage();
- }
+ int opt;
+
+ opt_complementary = "-1"; /* at least one arg */
+ /* "+": stop on first non-option */
+ opt = getopt32(argv, "+vp");
+ argv += optind;
+ if (opt & 1)
+ output_format = long_format;
+ if (opt & 2)
+ output_format = posix_format;
run_command(argv, &res);
/* Cheat. printf's are shorter :) */
+ /* (but see bb_putchar() body for additional wrinkle!) */
+ xdup2(2, 1); /* just in case libc does something silly :( */
stdout = stderr;
- dup2(2, 1); /* just in case libc does something silly :( */
summarize(output_format, argv, &res);
if (WIFSTOPPED(res.waitstatus))
return WTERMSIG(res.waitstatus);
if (WIFEXITED(res.waitstatus))
return WEXITSTATUS(res.waitstatus);
- fflush_stdout_and_exit(0);
+ fflush_stdout_and_exit(EXIT_SUCCESS);
}
projects / oweals / busybox.git / blobdiff