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// Functions for executing the jobs builtin.
#include "config.h" // IWYU pragma: keep
#include <errno.h>
#include <stdbool.h>
#ifdef HAVE__PROC_SELF_STAT
#include <sys/time.h>
#endif
#include "builtin.h"
#include "common.h"
#include "fallback.h" // IWYU pragma: keep
#include "io.h"
#include "proc.h"
#include "wgetopt.h"
#include "wutil.h" // IWYU pragma: keep
class parser_t;
/// Print modes for the jobs builtin.
enum {
JOBS_DEFAULT, // print lots of general info
JOBS_PRINT_PID, // print pid of each process in job
JOBS_PRINT_COMMAND, // print command name of each process in job
JOBS_PRINT_GROUP, // print group id of job
};
#ifdef HAVE__PROC_SELF_STAT
/// Calculates the cpu usage (in percent) of the specified job.
static int cpu_use(const job_t *j) {
double u = 0;
process_t *p;
for (p = j->first_process; p; p = p->next) {
struct timeval t;
int jiffies;
gettimeofday(&t, 0);
jiffies = proc_get_jiffies(p);
double t1 = 1000000.0 * p->last_time.tv_sec + p->last_time.tv_usec;
double t2 = 1000000.0 * t.tv_sec + t.tv_usec;
// fwprintf( stderr, L"t1 %f t2 %f p1 %d p2 %d\n", t1, t2, jiffies, p->last_jiffies );
u += ((double)(jiffies - p->last_jiffies)) / (t2 - t1);
}
return u * 1000000;
}
#endif
/// Print information about the specified job.
static void builtin_jobs_print(const job_t *j, int mode, int header, io_streams_t &streams) {
process_t *p;
switch (mode) {
case JOBS_DEFAULT: {
if (header) {
// Print table header before first job.
streams.out.append(_(L"Job\tGroup\t"));
#ifdef HAVE__PROC_SELF_STAT
streams.out.append(_(L"CPU\t"));
#endif
streams.out.append(_(L"State\tCommand\n"));
}
streams.out.append_format(L"%d\t%d\t", j->job_id, j->pgid);
#ifdef HAVE__PROC_SELF_STAT
streams.out.append_format(L"%d%%\t", cpu_use(j));
#endif
streams.out.append(job_is_stopped(j) ? _(L"stopped") : _(L"running"));
streams.out.append(L"\t");
streams.out.append(j->command_wcstr());
streams.out.append(L"\n");
break;
}
case JOBS_PRINT_GROUP: {
if (header) {
// Print table header before first job.
streams.out.append(_(L"Group\n"));
}
streams.out.append_format(L"%d\n", j->pgid);
break;
}
case JOBS_PRINT_PID: {
if (header) {
// Print table header before first job.
streams.out.append(_(L"Process\n"));
}
for (p = j->first_process; p; p = p->next) {
streams.out.append_format(L"%d\n", p->pid);
}
break;
}
case JOBS_PRINT_COMMAND: {
if (header) {
// Print table header before first job.
streams.out.append(_(L"Command\n"));
}
for (p = j->first_process; p; p = p->next) {
streams.out.append_format(L"%ls\n", p->argv0());
}
break;
}
}
}
/// The jobs builtin. Used fopr printing running jobs. Defined in builtin_jobs.c.
int builtin_jobs(parser_t &parser, io_streams_t &streams, wchar_t **argv) {
wgetopter_t w;
int argc = 0;
int found = 0;
int mode = JOBS_DEFAULT;
int print_last = 0;
argc = builtin_count_args(argv);
w.woptind = 0;
while (1) {
static const struct woption long_options[] = {
{L"pid", no_argument, 0, 'p'}, {L"command", no_argument, 0, 'c'},
{L"group", no_argument, 0, 'g'}, {L"last", no_argument, 0, 'l'},
{L"help", no_argument, 0, 'h'}, {0, 0, 0, 0}};
int opt_index = 0;
int opt = w.wgetopt_long(argc, argv, L"pclgh", long_options, &opt_index);
if (opt == -1) break;
switch (opt) {
case 0: {
if (long_options[opt_index].flag != 0) break;
streams.err.append_format(BUILTIN_ERR_UNKNOWN, argv[0],
long_options[opt_index].name);
builtin_print_help(parser, streams, argv[0], streams.err);
return 1;
}
case 'p': {
mode = JOBS_PRINT_PID;
break;
}
case 'c': {
mode = JOBS_PRINT_COMMAND;
break;
}
case 'g': {
mode = JOBS_PRINT_GROUP;
break;
}
case 'l': {
print_last = 1;
break;
}
case 'h': {
builtin_print_help(parser, streams, argv[0], streams.out);
return 0;
}
case '?': {
builtin_unknown_option(parser, streams, argv[0], argv[w.woptind - 1]);
return 1;
}
}
}
if (print_last) {
// Ignore unconstructed jobs, i.e. ourself.
job_iterator_t jobs;
const job_t *j;
while ((j = jobs.next())) {
if ((j->flags & JOB_CONSTRUCTED) && !job_is_completed(j)) {
builtin_jobs_print(j, mode, !streams.out_is_redirected, streams);
return 0;
}
}
} else {
if (w.woptind < argc) {
int i;
for (i = w.woptind; i < argc; i++) {
int pid;
wchar_t *end;
errno = 0;
pid = fish_wcstoi(argv[i], &end, 10);
if (errno || *end) {
streams.err.append_format(_(L"%ls: '%ls' is not a job\n"), argv[0], argv[i]);
return 1;
}
const job_t *j = job_get_from_pid(pid);
if (j && !job_is_completed(j)) {
builtin_jobs_print(j, mode, false, streams);
found = 1;
} else {
streams.err.append_format(_(L"%ls: No suitable job: %d\n"), argv[0], pid);
return 1;
}
}
} else {
job_iterator_t jobs;
const job_t *j;
while ((j = jobs.next())) {
// Ignore unconstructed jobs, i.e. ourself.
if ((j->flags & JOB_CONSTRUCTED) && !job_is_completed(j)) {
builtin_jobs_print(j, mode, !found && !streams.out_is_redirected, streams);
found = 1;
}
}
}
}
if (!found) {
// Do not babble if not interactive.
if (!streams.out_is_redirected) {
streams.out.append_format(_(L"%ls: There are no jobs\n"), argv[0]);
}
return 1;
}
return 0;
}
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