diff options
Diffstat (limited to 'trace/control.c')
-rw-r--r-- | trace/control.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/trace/control.c b/trace/control.c new file mode 100644 index 0000000..4c5527d --- /dev/null +++ b/trace/control.c @@ -0,0 +1,42 @@ +/* + * Interface for configuring and controlling the state of tracing events. + * + * Copyright (C) 2011 LluĂs Vilanova <vilanova@ac.upc.edu> + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + */ + +#include "trace/control.h" + + +void trace_backend_init_events(const char *fname) +{ + if (fname == NULL) { + return; + } + + FILE *fp = fopen(fname, "r"); + if (!fp) { + fprintf(stderr, "error: could not open trace events file '%s': %s\n", + fname, strerror(errno)); + exit(1); + } + char line_buf[1024]; + while (fgets(line_buf, sizeof(line_buf), fp)) { + size_t len = strlen(line_buf); + if (len > 1) { /* skip empty lines */ + line_buf[len - 1] = '\0'; + if (!trace_event_set_state(line_buf, true)) { + fprintf(stderr, + "error: trace event '%s' does not exist\n", line_buf); + exit(1); + } + } + } + if (fclose(fp) != 0) { + fprintf(stderr, "error: closing file '%s': %s\n", + fname, strerror(errno)); + exit(1); + } +} |