chiark / gitweb /
Major cleanup of all leftovers after rebasing on master.
[elogind.git] / src / shared / cgroup-show.c
index 550a2f5..4b03845 100644 (file)
 #include <errno.h>
 
 #include "util.h"
+#include "formats-util.h"
+#include "process-util.h"
 #include "macro.h"
+#include "path-util.h"
 #include "cgroup-util.h"
 #include "cgroup-show.h"
+#include "terminal-util.h"
 
 static int compare(const void *a, const void *b) {
         const pid_t *p = a, *q = b;
@@ -39,44 +43,61 @@ static int compare(const void *a, const void *b) {
         return 0;
 }
 
-static unsigned ilog10(unsigned long ul) {
-        int n = 0;
+static void show_pid_array(pid_t pids[], unsigned n_pids, const char *prefix, unsigned n_columns, bool extra, bool more, bool kernel_threads, OutputFlags flags) {
+        unsigned i, j, pid_width;
 
-        while (ul > 0) {
-                n++;
-                ul /= 10;
+        if (n_pids == 0)
+                return;
+
+        qsort(pids, n_pids, sizeof(pid_t), compare);
+
+        /* Filter duplicates */
+        for (j = 0, i = 1; i < n_pids; i++) {
+                if (pids[i] == pids[j])
+                        continue;
+                pids[++j] = pids[i];
         }
+        n_pids = j + 1;
+        pid_width = DECIMAL_STR_WIDTH(pids[j]);
+
+        if (flags & OUTPUT_FULL_WIDTH)
+                n_columns = 0;
+        else {
+                if (n_columns > pid_width+2)
+                        n_columns -= pid_width+2;
+                else
+                        n_columns = 20;
+        }
+        for (i = 0; i < n_pids; i++) {
+                _cleanup_free_ char *t = NULL;
+
+                get_process_cmdline(pids[i], n_columns, true, &t);
 
-        return n;
+                if (extra)
+                        printf("%s%s ", prefix, draw_special_char(DRAW_TRIANGULAR_BULLET));
+                else
+                        printf("%s%s", prefix, draw_special_char(((more || i < n_pids-1) ? DRAW_TREE_BRANCH : DRAW_TREE_RIGHT)));
+
+                printf("%*"PID_PRI" %s\n", pid_width, pids[i], strna(t));
+        }
 }
 
-static int show_cgroup_one_by_path(const char *path, const char *prefix, unsigned n_columns, bool more, bool kernel_threads) {
+
+static int show_cgroup_one_by_path(const char *path, const char *prefix, unsigned n_columns, bool more, bool kernel_threads, OutputFlags flags) {
         char *fn;
-        FILE *f;
+        _cleanup_fclose_ FILE *f = NULL;
         size_t n = 0, n_allocated = 0;
-        pid_t *pids = NULL;
-        char *p;
-        pid_t pid, biggest = 0;
+        _cleanup_free_ pid_t *pids = NULL;
+        _cleanup_free_ char *p = NULL;
+        pid_t pid;
         int r;
 
-        if (n_columns <= 0)
-                n_columns = columns();
-
-        if (!prefix)
-                prefix = "";
-
-        if ((r = cg_fix_path(path, &p)) < 0)
-                return r;
-
-        r = asprintf(&fn, "%s/cgroup.procs", p);
-        free(p);
-
+        r = cg_mangle_path(path, &p);
         if (r < 0)
-                return -ENOMEM;
+                return r;
 
+        fn = strjoina(p, "/cgroup.procs");
         f = fopen(fn, "re");
-        free(fn);
-
         if (!f)
                 return -errno;
 
@@ -85,177 +106,172 @@ static int show_cgroup_one_by_path(const char *path, const char *prefix, unsigne
                 if (!kernel_threads && is_kernel_thread(pid) > 0)
                         continue;
 
-                if (n >= n_allocated) {
-                        pid_t *npids;
-
-                        n_allocated = MAX(16U, n*2U);
-
-                        if (!(npids = realloc(pids, sizeof(pid_t) * n_allocated))) {
-                                r = -ENOMEM;
-                                goto finish;
-                        }
-
-                        pids = npids;
-                }
+                if (!GREEDY_REALLOC(pids, n_allocated, n + 1))
+                        return -ENOMEM;
 
                 assert(n < n_allocated);
                 pids[n++] = pid;
-
-                if (pid > biggest)
-                        biggest = pid;
         }
 
         if (r < 0)
-                goto finish;
-
-        if (n > 0) {
-                unsigned i, m;
-
-                /* Filter duplicates */
-                m = 0;
-                for (i = 0; i < n; i++) {
-                        unsigned j;
-
-                        for (j = i+1; j < n; j++)
-                                if (pids[i] == pids[j])
-                                        break;
-
-                        if (j >= n)
-                                pids[m++] = pids[i];
-                }
-                n = m;
-
-                /* And sort */
-                qsort(pids, n, sizeof(pid_t), compare);
-
-                if (n_columns > 8)
-                        n_columns -= 8;
-                else
-                        n_columns = 20;
-
-                for (i = 0; i < n; i++) {
-                        char *t = NULL;
-
-                        get_process_cmdline(pids[i], n_columns, true, &t);
-
-                        printf("%s%s %*lu %s\n",
-                               prefix,
-                               (more || i < n-1) ? "\342\224\234" : "\342\224\224",
-                               (int) ilog10(biggest),
-                               (unsigned long) pids[i],
-                               strna(t));
-
-                        free(t);
-                }
-        }
-
-        r = 0;
-
-finish:
-        free(pids);
+                return r;
 
-        if (f)
-                fclose(f);
+        show_pid_array(pids, n, prefix, n_columns, false, more, kernel_threads, flags);
 
-        return r;
+        return 0;
 }
 
-int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns, bool kernel_threads) {
-        DIR *d;
-        char *last = NULL;
-        char *p1 = NULL, *p2 = NULL, *fn = NULL, *gn = NULL;
+int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) {
+        _cleanup_free_ char *fn = NULL, *p1 = NULL, *last = NULL, *p2 = NULL;
+        _cleanup_closedir_ DIR *d = NULL;
+        char *gn = NULL;
         bool shown_pids = false;
         int r;
 
+        assert(path);
+
         if (n_columns <= 0)
                 n_columns = columns();
 
         if (!prefix)
                 prefix = "";
 
-        if ((r = cg_fix_path(path, &fn)) < 0)
+        r = cg_mangle_path(path, &fn);
+        if (r < 0)
                 return r;
 
-        if (!(d = opendir(fn))) {
-                free(fn);
+        d = opendir(fn);
+        if (!d)
                 return -errno;
-        }
 
         while ((r = cg_read_subgroup(d, &gn)) > 0) {
+                _cleanup_free_ char *k = NULL;
+
+                k = strjoin(fn, "/", gn, NULL);
+                free(gn);
+                if (!k)
+                        return -ENOMEM;
+
+                if (!(flags & OUTPUT_SHOW_ALL) && cg_is_empty_recursive(NULL, k) > 0)
+                        continue;
 
                 if (!shown_pids) {
-                        show_cgroup_one_by_path(path, prefix, n_columns, true, kernel_threads);
+                        show_cgroup_one_by_path(path, prefix, n_columns, true, kernel_threads, flags);
                         shown_pids = true;
                 }
 
                 if (last) {
-                        printf("%s\342\224\234 %s\n", prefix, file_name_from_path(last));
-
-                        if (!p1)
-                                if (!(p1 = strappend(prefix, "\342\224\202 "))) {
-                                        r = -ENOMEM;
-                                        goto finish;
-                                }
+                        printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_BRANCH), cg_unescape(basename(last)));
 
-                        show_cgroup_by_path(last, p1, n_columns-2, kernel_threads);
+                        if (!p1) {
+                                p1 = strappend(prefix, draw_special_char(DRAW_TREE_VERTICAL));
+                                if (!p1)
+                                        return -ENOMEM;
+                        }
 
+                        show_cgroup_by_path(last, p1, n_columns-2, kernel_threads, flags);
                         free(last);
-                        last = NULL;
                 }
 
-                r = asprintf(&last, "%s/%s", fn, gn);
-                free(gn);
-
-                if (r < 0) {
-                        r = -ENOMEM;
-                        goto finish;
-                }
+                last = k;
+                k = NULL;
         }
 
         if (r < 0)
-                goto finish;
+                return r;
 
         if (!shown_pids)
-                show_cgroup_one_by_path(path, prefix, n_columns, !!last, kernel_threads);
+                show_cgroup_one_by_path(path, prefix, n_columns, !!last, kernel_threads, flags);
 
         if (last) {
-                printf("%s\342\224\224 %s\n", prefix, file_name_from_path(last));
+                printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_RIGHT), cg_unescape(basename(last)));
 
-                if (!p2)
-                        if (!(p2 = strappend(prefix, "  "))) {
-                                r = -ENOMEM;
-                                goto finish;
-                        }
+                if (!p2) {
+                        p2 = strappend(prefix, "  ");
+                        if (!p2)
+                                return -ENOMEM;
+                }
 
-                show_cgroup_by_path(last, p2, n_columns-2, kernel_threads);
+                show_cgroup_by_path(last, p2, n_columns-2, kernel_threads, flags);
         }
 
-        r = 0;
+        return 0;
+}
+
+int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) {
+        _cleanup_free_ char *p = NULL;
+        int r;
 
-finish:
-        free(p1);
-        free(p2);
-        free(last);
-        free(fn);
+        assert(path);
 
-        closedir(d);
+        r = cg_get_path(controller, path, NULL, &p);
+        if (r < 0)
+                return r;
 
-        return r;
+        return show_cgroup_by_path(p, prefix, n_columns, kernel_threads, flags);
 }
 
-int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads) {
-        char *p;
+static int show_extra_pids(const char *controller, const char *path, const char *prefix, unsigned n_columns, const pid_t pids[], unsigned n_pids, OutputFlags flags) {
+        _cleanup_free_ pid_t *copy = NULL;
+        unsigned i, j;
         int r;
 
-        assert(controller);
         assert(path);
 
-        r = cg_get_path(controller, path, NULL, &p);
+        if (n_pids <= 0)
+                return 0;
+
+        if (n_columns <= 0)
+                n_columns = columns();
+
+        prefix = strempty(prefix);
+
+        copy = new(pid_t, n_pids);
+        if (!copy)
+                return -ENOMEM;
+
+        for (i = 0, j = 0; i < n_pids; i++) {
+                _cleanup_free_ char *k = NULL;
+
+                r = cg_pid_get_path(controller, pids[i], &k);
+                if (r < 0)
+                        return r;
+
+                if (path_startswith(k, path))
+                        continue;
+
+                copy[j++] = pids[i];
+        }
+
+        show_pid_array(copy, j, prefix, n_columns, true, false, false, flags);
+
+        return 0;
+}
+
+int show_cgroup_and_extra(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, const pid_t extra_pids[], unsigned n_extra_pids, OutputFlags flags) {
+        int r;
+
+        assert(path);
+
+        r = show_cgroup(controller, path, prefix, n_columns, kernel_threads, flags);
         if (r < 0)
                 return r;
 
-        r = show_cgroup_by_path(p, prefix, n_columns, kernel_threads);
-        free(p);
+        return show_extra_pids(controller, path, prefix, n_columns, extra_pids, n_extra_pids, flags);
+}
+
+/// UNNEEDED by elogind
+#if 0
+int show_cgroup_and_extra_by_spec(const char *spec, const char *prefix, unsigned n_columns, bool kernel_threads, const pid_t extra_pids[], unsigned n_extra_pids, OutputFlags flags) {
+        _cleanup_free_ char *controller = NULL, *path = NULL;
+        int r;
+
+        assert(spec);
+
+        r = cg_split_spec(spec, &controller, &path);
+        if (r < 0)
+                return r;
 
-        return r;
+        return show_cgroup_and_extra(controller, path, prefix, n_columns, kernel_threads, extra_pids, n_extra_pids, flags);
 }
+#endif // 0