Initial release

src/time.c

@@ -0,0 +1,93 @@
+/* time.c */
+
+
+
+#include <sys/times.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+extern int optind;
+#include <stdio.h>
+#include <errno.h>
+
+
+/* time */
+static int _time(int argc, char * argv[])
+{
+	pid_t pid;
+	int status;
+	struct tms tmsbuf;
+	clock_t cbefore, cafter;
+
+	if((cbefore = times(NULL)) == -1)
+	{
+		fprintf(stderr, "%s", "time: ");
+		perror("times");
+		return 2;
+	}
+	if((pid = fork()) == -1)
+	{
+		fprintf(stderr, "%s", "time: ");
+		perror("fork");
+		return 2;
+	}
+	if(pid == 0)
+	{
+		execvp(argv[0], argv);
+		fprintf(stderr, "%s", "time: ");
+		perror(argv[0]);
+		if(errno == ENOENT)
+			return 127;
+		return 126;
+	}
+	for(;;)
+	{
+		if(waitpid(pid, &status, 0) == -1)
+		{
+			fprintf(stderr, "%s", "time: ");
+			perror("waitpid");
+			return 2;
+		}
+		if(WIFEXITED(status))
+			break;
+	}
+	if((cafter = times(&tmsbuf)) == -1)
+	{
+		fprintf(stderr, "%s", "time: ");
+		perror("times");
+		return 2;
+	}
+	/* FIXME */
+	fprintf(stderr, "real %ld\nuser %ld\nsys %ld\n",
+			cafter - cbefore,
+			tmsbuf.tms_utime + tmsbuf.tms_cutime,
+			tmsbuf.tms_stime + tmsbuf.tms_cstime);
+	return 0;
+}
+
+
+/* usage */
+static int _usage(void)
+{
+	fprintf(stderr, "%s", "Usage: time [-p] utility [argument...]\n\
+  -p    force the POSIX locale\n");
+	return 1;
+}
+
+
+/* main */
+int main(int argc, char * argv[])
+{
+	int o;
+
+	while((o = getopt(argc, argv, "p")) != -1)
+	{
+		if(o == 'p')
+			continue;
+		if(o == '?')
+			return _usage();
+	}
+	if(optind == argc)
+		return _usage();
+	return _time(argc - optind, &argv[optind]);
+}