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time: implement -a, -o FILE

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function                                             old     new   delta
time_main                                           1052    1076     +24
packed_usage                                       31571   31577      +6

Signed-off-by: Tommi Rantala <tommi.t.rantala@nokia.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Tommi Rantala 2017-04-28 17:54:14 +02:00 committed by Denys Vlasenko
parent 854174f7dd
commit 5fe5be210c
1 changed files with 31 additions and 10 deletions
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41
miscutils/time.c
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@ -21,11 +21,13 @@
//kbuild:lib-$(CONFIG_TIME) += time.o
//usage:#define time_trivial_usage
//usage: "[-vp] PROG ARGS"
//usage: "[-vpa] [-o FILE] PROG ARGS"
//usage:#define time_full_usage "\n\n"
//usage: "Run PROG, display resource usage when it exits\n"
//usage: "\n -v Verbose"
//usage: "\n -p POSIX output format"
//usage: "\n -o FILE Write result to FILE"
//usage: "\n -a Append (else overwrite)"
#include "libbb.h"
#include <sys/resource.h> /* getrusage */
@ -414,28 +416,47 @@ int time_main(int argc UNUSED_PARAM, char **argv)
{
resource_t res;
const char *output_format = default_format;
char *output_filename;
int output_fd;
int opt;
int ex;
enum {
OPT_v = (1 << 0),
OPT_p = (1 << 1),
OPT_a = (1 << 2),
OPT_o = (1 << 3),
};
opt_complementary = "-1"; /* at least one arg */
/* "+": stop on first non-option */
opt = getopt32(argv, "+vp");
opt = getopt32(argv, "+vpao:", &output_filename);
argv += optind;
if (opt & 1)
if (opt & OPT_v)
output_format = long_format;
if (opt & 2)
if (opt & OPT_p)
output_format = posix_format;
output_fd = STDERR_FILENO;
if (opt & OPT_o) {
output_fd = xopen(output_filename,
(opt & OPT_a) /* append? */
? (O_CREAT | O_WRONLY | O_CLOEXEC | O_APPEND)
: (O_CREAT | O_WRONLY | O_CLOEXEC | O_TRUNC)
);
}
run_command(argv, &res);
/* Cheat. printf's are shorter :) */
xdup2(STDERR_FILENO, STDOUT_FILENO);
xdup2(output_fd, STDOUT_FILENO);
summarize(output_format, argv, &res);
ex = WEXITSTATUS(res.waitstatus);
/* Impossible: we do not use WUNTRACED flag in wait()...
if (WIFSTOPPED(res.waitstatus))
return WSTOPSIG(res.waitstatus);
ex = WSTOPSIG(res.waitstatus);
*/
if (WIFSIGNALED(res.waitstatus))
return WTERMSIG(res.waitstatus);
if (WIFEXITED(res.waitstatus))
return WEXITSTATUS(res.waitstatus);
fflush_stdout_and_exit(EXIT_SUCCESS);
ex = WTERMSIG(res.waitstatus);
fflush_stdout_and_exit(ex);
}