fish-shell/builtin_jobs.cpp

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/** \file builtin_jobs.c
Functions for executing the jobs builtin.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <wchar.h>
#include <unistd.h>
#include <termios.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <wctype.h>
#include "fallback.h"
#include "util.h"
#include "wutil.h"
#include "builtin.h"
#include "proc.h"
#include "parser.h"
#include "common.h"
#include "wgetopt.h"
/**
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)
{
process_t *p;
switch (mode)
{
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case JOBS_DEFAULT:
{
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if (header)
{
/*
Print table header before first job
*/
stdout_buffer.append(_(L"Job\tGroup\t"));
#ifdef HAVE__PROC_SELF_STAT
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stdout_buffer.append(_(L"CPU\t"));
#endif
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stdout_buffer.append(_(L"State\tCommand\n"));
}
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append_format(stdout_buffer, L"%d\t%d\t", j->job_id, j->pgid);
#ifdef HAVE__PROC_SELF_STAT
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append_format(stdout_buffer, L"%d%%\t", cpu_use(j));
#endif
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stdout_buffer.append(job_is_stopped(j)?_(L"stopped"):_(L"running"));
stdout_buffer.append(L"\t");
stdout_buffer.append(j->command_wcstr());
stdout_buffer.append(L"\n");
break;
}
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case JOBS_PRINT_GROUP:
{
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if (header)
{
/*
Print table header before first job
*/
stdout_buffer.append(_(L"Group\n"));
}
append_format(stdout_buffer, L"%d\n", j->pgid);
break;
}
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case JOBS_PRINT_PID:
{
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if (header)
{
/*
Print table header before first job
*/
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stdout_buffer.append(_(L"Process\n"));
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}
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for (p=j->first_process; p; p=p->next)
{
append_format(stdout_buffer, L"%d\n", p->pid);
}
break;
}
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case JOBS_PRINT_COMMAND:
{
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if (header)
{
/*
Print table header before first job
*/
stdout_buffer.append(_(L"Command\n"));
}
for (p=j->first_process; p; p=p->next)
{
append_format(stdout_buffer, L"%ls\n", p->argv0());
}
break;
}
}
}
/**
The jobs builtin. Used fopr printing running jobs. Defined in builtin_jobs.c.
*/
static int builtin_jobs(parser_t &parser, wchar_t **argv)
{
int argc=0;
int found=0;
int mode=JOBS_DEFAULT;
int print_last = 0;
argc = builtin_count_args(argv);
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 = wgetopt_long(argc,
argv,
L"pclgh",
long_options,
&opt_index);
if (opt == -1)
break;
switch (opt)
{
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case 0:
if (long_options[opt_index].flag != 0)
break;
append_format(stderr_buffer,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name);
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builtin_print_help(parser, argv[0], stderr_buffer);
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return 1;
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case 'p':
mode=JOBS_PRINT_PID;
break;
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case 'c':
mode=JOBS_PRINT_COMMAND;
break;
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case 'g':
mode=JOBS_PRINT_GROUP;
break;
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case 'l':
{
print_last = 1;
break;
}
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case 'h':
builtin_print_help(parser, argv[0], stdout_buffer);
return 0;
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case '?':
builtin_unknown_option(parser, argv[0], argv[woptind-1]);
return 1;
}
}
/*
Do not babble if not interactive
*/
if (builtin_out_redirect)
{
found=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, !found);
return 0;
}
}
}
else
{
if (woptind < argc)
{
int i;
found = 1;
for (i=woptind; i<argc; i++)
{
int pid;
wchar_t *end;
errno=0;
pid=fish_wcstoi(argv[i], &end, 10);
if (errno || *end)
{
append_format(stderr_buffer,
_(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, !found);
}
else
{
append_format(stderr_buffer,
_(L"%ls: No suitable job: %d\n"),
argv[0],
pid);
return 1;
}
}
}
else
{
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job_iterator_t jobs;
const job_t *j;
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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);
found = 1;
}
}
}
}
if (!found)
{
append_format(stdout_buffer,
_(L"%ls: There are no jobs\n"),
argv[0]);
}
return 0;
}