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This reads and separates all fields from /proc/<pid>/stat or /proc/<pid>/task/<tid>/stat as there are easy mistakes to be done in the implementation. Some tests are added to show it works correctly. No number parsing is done as it would be unused for most of the fields most, if not all, of the time. No struct is used for the result as the length can vary (new fields can be added in the future). Signed-off-by: Martin Kletzander <mkletzan@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com>
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
#include <config.h>
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#include "testutils.h"
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#include "virfilewrapper.h"
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#include "virprocess.h"
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struct testData {
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const char *filename;
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const char *command;
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size_t count;
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bool self;
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};
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static int
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test_virProcessGetStat(const void *opaque)
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{
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struct testData *data = (struct testData *) opaque;
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g_autofree char *data_dir = NULL;
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g_auto(GStrv) proc_stat = NULL;
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size_t len = 0;
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id_t id = data->self ? 0 : -1;
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const char *command = NULL;
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data_dir = g_strdup_printf("%s/virprocessstatdata/%s/",
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abs_srcdir, data->filename);
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/* We are using predictable id of -1 because this case we will clearly see
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* that the test failed in case of virFileWrapper failure */
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if (id)
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virFileWrapperAddPrefix("/proc/-1/task/-1/", data_dir);
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else
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virFileWrapperAddPrefix("/proc/self/", data_dir);
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proc_stat = virProcessGetStat(id, id);
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virFileWrapperClearPrefixes();
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if (!proc_stat) {
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fprintf(stderr, "Could not get process stats\n");
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return -1;
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}
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len = g_strv_length(proc_stat);
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if (data->count != len) {
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fprintf(stderr, "Count incorrect, expected %zu, got %zu\n",
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data->count, len);
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return -1;
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}
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command = proc_stat[VIR_PROCESS_STAT_COMM];
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if (!STREQ_NULLABLE(data->command, command)) {
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fprintf(stderr, "Command incorrect, expected %s, got %s\n",
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data->command, command);
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return -1;
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}
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return 0;
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}
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static int
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mymain(void)
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{
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struct testData data = {0};
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int ret = 0;
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#define DO_TEST(_filename, _command, _count, _self) \
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do { \
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data = (struct testData){ \
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.filename = _filename, \
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.command = _command, \
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.count = _count, \
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.self = _self, \
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}; \
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if (virTestRun("Reading process stat: " _filename, \
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test_virProcessGetStat, &data) < 0) \
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ret = -1; \
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} while (0)
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DO_TEST("simple", "command", 5, true);
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DO_TEST("complex", "this) is ( a \t weird )\n)( (command ( ", 100, false);
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return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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VIR_TEST_MAIN(mymain)
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