Release 4.11 tools/lib/subcmd/pager.c
#include <sys/select.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <sys/ioctl.h>
#include "pager.h"
#include "run-command.h"
#include "sigchain.h"
#include "subcmd-config.h"
/*
* This is split up from the rest of git so that we can do
* something different on Windows.
*/
static int spawned_pager;
static int pager_columns;
void pager_init(const char *pager_env)
{
subcmd_config.pager_env = pager_env;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Josh Poimboeuf | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static void pager_preexec(void)
{
/*
* Work around bug in "less" by not starting it until we
* have real input
*/
fd_set in;
FD_ZERO(&in);
FD_SET(0, &in);
select(1, &in, NULL, &in, NULL);
setenv("LESS", "FRSX", 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ingo Molnar | 50 | 100.00% | 1 | 100.00% |
| Total | 50 | 100.00% | 1 | 100.00% |
static const char *pager_argv[] = { "sh", "-c", NULL, NULL };
static struct child_process pager_process;
static void wait_for_pager(void)
{
fflush(stdout);
fflush(stderr);
/* signal EOF to pager */
close(1);
close(2);
finish_command(&pager_process);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ingo Molnar | 35 | 100.00% | 1 | 100.00% |
| Total | 35 | 100.00% | 1 | 100.00% |
static void wait_for_pager_signal(int signo)
{
wait_for_pager();
sigchain_pop(signo);
raise(signo);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ingo Molnar | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
void setup_pager(void)
{
const char *pager = getenv(subcmd_config.pager_env);
struct winsize sz;
if (!isatty(1))
return;
if (ioctl(1, TIOCGWINSZ, &sz) == 0)
pager_columns = sz.ws_col;
if (!pager)
pager = getenv("PAGER");
if (!(pager || access("/usr/bin/pager", X_OK)))
pager = "/usr/bin/pager";
if (!(pager || access("/usr/bin/less", X_OK)))
pager = "/usr/bin/less";
if (!pager)
pager = "cat";
if (!*pager || !strcmp(pager, "cat"))
return;
spawned_pager = 1; /* means we are emitting to terminal */
/* spawn the pager */
pager_argv[2] = pager;
pager_process.argv = pager_argv;
pager_process.in = -1;
pager_process.preexec_cb = pager_preexec;
if (start_command(&pager_process))
return;
/* original process continues, but writes to the pipe */
dup2(pager_process.in, 1);
if (isatty(2))
dup2(pager_process.in, 2);
close(pager_process.in);
/* this makes sure that the parent terminates after the pager */
sigchain_push_common(wait_for_pager_signal);
atexit(wait_for_pager);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ingo Molnar | 145 | 69.38% | 1 | 20.00% |
| Andi Kleen | 24 | 11.48% | 1 | 20.00% |
| Michael Lentine | 20 | 9.57% | 1 | 20.00% |
| Avik Sil | 17 | 8.13% | 1 | 20.00% |
| Josh Poimboeuf | 3 | 1.44% | 1 | 20.00% |
| Total | 209 | 100.00% | 5 | 100.00% |
int pager_in_use(void)
{
return spawned_pager;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ingo Molnar | 9 | 90.00% | 1 | 50.00% |
| Josh Poimboeuf | 1 | 10.00% | 1 | 50.00% |
| Total | 10 | 100.00% | 2 | 100.00% |
int pager_get_columns(void)
{
char *s;
s = getenv("COLUMNS");
if (s)
return atoi(s);
return (pager_columns ? pager_columns : 80) - 2;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andi Kleen | 39 | 100.00% | 1 | 100.00% |
| Total | 39 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ingo Molnar | 296 | 66.97% | 1 | 14.29% |
| Andi Kleen | 70 | 15.84% | 1 | 14.29% |
| Josh Poimboeuf | 39 | 8.82% | 3 | 42.86% |
| Michael Lentine | 20 | 4.52% | 1 | 14.29% |
| Avik Sil | 17 | 3.85% | 1 | 14.29% |
| Total | 442 | 100.00% | 7 | 100.00% |
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