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tools lib subcmd: Support overwriting the pager

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Add an interface to the auto pager code that allows callers to overwrite
the pager.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kim Phillips <kim.phillips@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20180918123214.26728-3-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2018-09-18 05:32:07 -07:00 committed by Arnaldo Carvalho de Melo
parent c12e039d12
commit 03a1f49f26
2 changed files with 11 additions and 1 deletions
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11
tools/lib/subcmd/pager.c
View File

@ -23,6 +23,13 @@ void pager_init(const char *pager_env)
subcmd_config.pager_env = pager_env;
}
static const char *forced_pager;
void force_pager(const char *pager)
{
forced_pager = pager;
}
static void pager_preexec(void)
{
/*
@ -66,7 +73,9 @@ void setup_pager(void)
const char *pager = getenv(subcmd_config.pager_env);
struct winsize sz;
if (!isatty(1))
if (forced_pager)
pager = forced_pager;
if (!isatty(1) && !forced_pager)
return;
if (ioctl(1, TIOCGWINSZ, &sz) == 0)
pager_columns = sz.ws_col;

1
tools/lib/subcmd/pager.h
View File

@ -7,5 +7,6 @@ extern void pager_init(const char *pager_env);
extern void setup_pager(void);
extern int pager_in_use(void);
extern int pager_get_columns(void);
extern void force_pager(const char *);
#endif /* __SUBCMD_PAGER_H */