diff options
| author | Andi Kleen <ak@linux.intel.com> | 2016-09-15 15:24:44 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-10-03 21:35:45 -0300 |
| commit | 61eb2eb434b3430c6ef70536eb3d16b616b5ee52 (patch) | |
| tree | a289700b5c404324000000d594954c97371134f8 /tools/lib/subcmd/pager.c | |
| parent | 08e60ed15d0483be38a87d17538ccf02acff5b1f (diff) | |
perf tools: Query terminal width and use in perf list
Automatically adapt the now wider and word wrapped perf list output to
wider terminals. This requires querying the terminal before the auto
pager takes over, and exporting this information from the pager
subsystem.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/1473978296-20712-8-git-send-email-sukadev@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib/subcmd/pager.c')
| -rw-r--r-- | tools/lib/subcmd/pager.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tools/lib/subcmd/pager.c b/tools/lib/subcmd/pager.c index d50f3b58606b..6518bea926d6 100644 --- a/tools/lib/subcmd/pager.c +++ b/tools/lib/subcmd/pager.c @@ -3,6 +3,7 @@ #include <stdio.h> #include <string.h> #include <signal.h> +#include <sys/ioctl.h> #include "pager.h" #include "run-command.h" #include "sigchain.h" @@ -14,6 +15,7 @@ */ static int spawned_pager; +static int pager_columns; void pager_init(const char *pager_env) { @@ -58,9 +60,12 @@ static void wait_for_pager_signal(int signo) 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))) @@ -98,3 +103,14 @@ int pager_in_use(void) { return spawned_pager; } + +int pager_get_columns(void) +{ + char *s; + + s = getenv("COLUMNS"); + if (s) + return atoi(s); + + return (pager_columns ? pager_columns : 80) - 2; +} |