Add PCP support

pcp/PCPProcess.c

@@ -74,6 +74,7 @@ const ProcessFieldData Process_fields[] = {
    [IO_RATE] = { .name = "IO_RATE", .title = "   DISK R/W ", .description = "Total I/O rate in bytes per second", .flags = PROCESS_FLAG_IO, .defaultSortDesc = true, },
    [CGROUP] = { .name = "CGROUP", .title = "CGROUP (raw)                        ", .description = "Which cgroup the process is in", .flags = PROCESS_FLAG_LINUX_CGROUP, },
    [CCGROUP] = { .name = "CCGROUP", .title = "CGROUP (compressed)                 ", .description = "Which cgroup the process is in (condensed to essentials)", .flags = PROCESS_FLAG_LINUX_CGROUP, },
+   [CONTAINER] = { .name = "CONTAINER", .title = "CONTAINER                           ", .description = "Name of the container the process is in (guessed by heuristics)", .flags = PROCESS_FLAG_LINUX_CGROUP, },
    [OOM] = { .name = "OOM", .title = " OOM ", .description = "OOM (Out-of-Memory) killer score", .flags = PROCESS_FLAG_LINUX_OOM, .defaultSortDesc = true, },
    [PERCENT_CPU_DELAY] = { .name = "PERCENT_CPU_DELAY", .title = "CPUD% ", .description = "CPU delay %", .flags = 0, .defaultSortDesc = true, },
    [PERCENT_IO_DELAY] = { .name = "PERCENT_IO_DELAY", .title = " IOD% ", .description = "Block I/O delay %", .flags = 0, .defaultSortDesc = true, },
@@ -161,6 +162,7 @@ static void PCPProcess_rowWriteField(const Row* super, RichString* str, ProcessF
    case IO_RATE: Row_printRate(str, PCPProcess_totalIORate(pp), coloring); return;
    case CGROUP: xSnprintf(buffer, n, "%-35.35s ", pp->cgroup ? pp->cgroup : "N/A"); break;
    case CCGROUP: xSnprintf(buffer, n, "%-35.35s ", pp->cgroup_short ? pp->cgroup_short : (pp->cgroup ? pp->cgroup : "N/A")); break;
+   case CONTAINER: xSnprintf(buffer, n, "%-35.35s ", pp->container_short ? pp->container_short : "N/A"); break;
    case OOM: xSnprintf(buffer, n, "%4u ", pp->oom); break;
    case PERCENT_CPU_DELAY:
       PCPProcess_printDelay(pp->cpu_delay_percent, buffer, n);
@@ -259,6 +261,8 @@ static int PCPProcess_compareByKey(const Process* v1, const Process* v2, Process
       return SPACESHIP_NULLSTR(p1->cgroup, p2->cgroup);
    case CCGROUP:
       return SPACESHIP_NULLSTR(p1->cgroup_short, p2->cgroup_short);
+   case CONTAINER:
+      return SPACESHIP_NULLSTR(p1->container_short, p2->container_short);
    case OOM:
       return SPACESHIP_NUMBER(p1->oom, p2->oom);
    case PERCENT_CPU_DELAY:

pcp/PCPProcess.h

@@ -75,6 +75,7 @@ typedef struct PCPProcess_ {
    double io_rate_write_bps;
    char* cgroup;
    char* cgroup_short;
+   char* container_short;
    long int autogroup_id;
    int autogroup_nice;
    unsigned int oom;

pcp/PCPProcessTable.c

@@ -267,9 +267,23 @@ static void PCPProcessTable_readCGroups(PCPProcess* pp, int pid, int offset) {
          free(pp->cgroup_short);
          pp->cgroup_short = NULL;
       }
+
+      char* container_short = CGroup_filterName(pp->cgroup);
+      if (container_short) {
+         Row_updateFieldWidth(CONTAINER, strlen(container_short));
+         free_and_xStrdup(&pp->container_short, container_short);
+         free(container_short);
+      } else {
+         Row_updateFieldWidth(CONTAINER, strlen("N/A"));
+         free(pp->container_short);
+         pp->container_short = NULL;
+      }
    } else {
       free(pp->cgroup_short);
       pp->cgroup_short = NULL;
+
+      free(pp->container_short);
+      pp->container_short = NULL;
    }
 }
 

pcp/ProcessField.h

@@ -46,7 +46,8 @@ in the source distribution for its full text.
    AUTOGROUP_ID = 127,           \
    AUTOGROUP_NICE = 128,         \
    CCGROUP = 129,                \
-   M_PRIV = 130,                 \
+   CONTAINER = 130,              \
+   M_PRIV = 131,                 \
    // End of list