diff options
| author | Alessandro Puccetti <alessandro@kinvolk.io> | 2016-06-05 19:42:37 +0200 |
|---|---|---|
| committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2016-06-05 13:42:37 -0400 |
| commit | 308253c5a2b146fc18e3789725c092ac55b10ce7 (patch) | |
| tree | a502c97b93a226b425c1e273479df1de7152ba73 /src | |
| parent | 0a62f81045dd810c8f1223cccbac4d706ea2cb45 (diff) | |
cgtop: add option to show a single cgroup subtree (#3413)
When many services are running, it was difficult to see only the interesting ones.
This patch allows to show only the subtree of interest.
Diffstat (limited to 'src')
| -rw-r--r-- | src/cgtop/cgtop.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/src/cgtop/cgtop.c b/src/cgtop/cgtop.c index 33379eb9bd..b4a982ce38 100644 --- a/src/cgtop/cgtop.c +++ b/src/cgtop/cgtop.c @@ -72,6 +72,7 @@ static bool arg_batch = false; static bool arg_raw = false; static usec_t arg_delay = 1*USEC_PER_SEC; static char* arg_machine = NULL; +static char* arg_root = NULL; static bool arg_recursive = true; static enum { @@ -653,7 +654,7 @@ static void display(Hashmap *a) { } static void help(void) { - printf("%s [OPTIONS...]\n\n" + printf("%s [OPTIONS...] [CGROUP]\n\n" "Show top control groups by their resource usage.\n\n" " -h --help Show this help\n" " --version Show package version\n" @@ -835,7 +836,13 @@ static int parse_argv(int argc, char *argv[]) { assert_not_reached("Unhandled option"); } - if (optind < argc) { + if (optind == argc-1) { + if (arg_machine) { + log_error("Specifying a control group path together with the -M option is not allowed"); + return -EINVAL; + } + arg_root = argv[optind]; + } else if (optind < argc) { log_error("Too many arguments."); return -EINVAL; } @@ -864,6 +871,13 @@ static int get_cgroup_root(char **ret) { const char *m; int r; + if (arg_root) { + *ret = strdup(arg_root); + if (!*ret) + return log_oom(); + return 0; + } + if (!arg_machine) { r = cg_get_root_path(ret); if (r < 0) |