161 lines
3.4 KiB
C
Executable file
161 lines
3.4 KiB
C
Executable file
/* time - time a command Authors: Andy Tanenbaum & Michiel Huisjes */
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#define NEW 1
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#include <sys/types.h>
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#include <sys/times.h>
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#include <limits.h>
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#include <time.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <minix/minlib.h>
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#include <stdio.h>
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/* -DNEW prints time to 0.01 sec. */
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#ifdef NEW
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#define HUNDREDTHS 1
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#endif
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char **args;
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char *name;
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int digit_seen;
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char a[] = " . \0";
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_PROTOTYPE(int main, (int argc, char **argv));
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_PROTOTYPE(void print_time, (clock_t t));
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_PROTOTYPE(void twin, (int n, char *p));
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_PROTOTYPE(void execute, (void));
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int main(argc, argv)
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int argc;
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char *argv[];
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{
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struct tms pre_buf, post_buf;
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int status, pid;
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#if _VMD_EXT
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struct timeval start_time, end_time;
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#else
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struct tms dummy;
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int start_time, end_time;
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#endif
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clock_t real_time;
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if (argc == 1) exit(0);
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args = &argv[1];
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name = argv[1];
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/* Get real time at start of run. */
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#if _VMD_EXT
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(void) sysutime(UTIME_TIMEOFDAY, &start_time);
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#else
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start_time = times(&dummy);
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#endif
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/* Fork off child. */
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if ((pid = fork()) < 0) {
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std_err("Cannot fork\n");
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exit(1);
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}
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if (pid == 0) execute();
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/* Parent is the time program. Disable interrupts and wait. */
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signal(SIGINT, SIG_IGN);
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signal(SIGQUIT, SIG_IGN);
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do {
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times(&pre_buf);
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} while (wait(&status) != pid);
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#if _VMD_EXT
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(void) sysutime(UTIME_TIMEOFDAY, &end_time);
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real_time = (end_time.tv_sec - start_time.tv_sec) * CLOCKS_PER_SEC
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+ (end_time.tv_usec - start_time.tv_usec) * CLOCKS_PER_SEC / 1000000;
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#else
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end_time = times(&dummy);
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real_time = (end_time - start_time);
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#endif
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if ((status & 0377) != 0) std_err("Command terminated abnormally.\n");
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times(&post_buf);
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/* Print results. -DNEW enables time on one line to 0.01 sec */
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#ifndef NEW
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std_err("real ");
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print_time(real_time);
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std_err("\nuser ");
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print_time(post_buf.tms_cutime - pre_buf.tms_cutime);
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std_err("\nsys ");
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print_time(post_buf.tms_cstime - pre_buf.tms_cstime);
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std_err("\n");
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#else
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print_time(real_time);
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std_err(" real");
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print_time(post_buf.tms_cutime - pre_buf.tms_cutime);
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std_err(" user");
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print_time(post_buf.tms_cstime - pre_buf.tms_cstime);
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std_err(" sys\n");
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#endif
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return((status & 0377) ? -1 : (status >> 8));
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}
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void print_time(t)
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register clock_t t;
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{
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/* Print the time 't' in hours: minutes: seconds. 't' is in ticks. */
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int hours, minutes, seconds, hundredths, i;
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digit_seen = 0;
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for (i = 0; i < 8; i++) a[i] = ' ';
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hours = (int) (t / ((clock_t) 3600 * CLOCKS_PER_SEC));
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t -= (clock_t) hours * 3600 * CLOCKS_PER_SEC;
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minutes = (int) (t / ((clock_t) 60 * CLOCKS_PER_SEC));
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t -= (clock_t) minutes * 60 * CLOCKS_PER_SEC;
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seconds = (int) (t / CLOCKS_PER_SEC);
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t -= (clock_t) seconds * CLOCKS_PER_SEC;
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hundredths = (int) (t * 100 / CLOCKS_PER_SEC);
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if (hours) {
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twin(hours, &a[0]);
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a[2] = ':';
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}
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if (minutes || digit_seen) {
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twin(minutes, &a[3]);
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a[5] = ':';
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}
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if (seconds || digit_seen)
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twin(seconds, &a[6]);
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else
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a[7] = '0';
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a[9] = hundredths / 10 + '0';
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#ifdef HUNDREDTHS /* tenths used to be enough */
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a[10] = hundredths % 10 + '0';
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#endif
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std_err(a);
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}
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void twin(n, p)
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int n;
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char *p;
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{
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char c1, c2;
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c1 = (n / 10) + '0';
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c2 = (n % 10) + '0';
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if (digit_seen == 0 && c1 == '0') c1 = ' ';
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*p++ = c1;
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*p++ = c2;
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if (n > 0) digit_seen = 1;
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}
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void execute()
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{
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execvp(name, args);
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std_err("Cannot execute ");
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std_err(name);
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std_err("\n");
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exit(-1);
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}
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