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help/log.c: better error handling for "log_output" 

* Close previous log file if one was opened before.
* Return error if opening file fails.

Change-Id: I103025cd86bcac785fe39e13bc7d5f79d78e38e7
Signed-off-by: Girts Folkmanis <opensource@girts.me>
Reviewed-on: http://openocd.zylin.com/3878
Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
This commit is contained in:
Girts 2016-11-05 14:38:55 -07:00 committed by Freddie Chopin
parent b90d58db07
commit 8addd9503e
1 changed files with 9 additions and 3 deletions
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12
src/helper/log.c
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@ -251,9 +251,15 @@ COMMAND_HANDLER(handle_log_output_command)
{
if (CMD_ARGC == 1) {
FILE *file = fopen(CMD_ARGV[0], "w");
if (file)
log_output = file;
if (file == NULL) {
LOG_ERROR("failed to open output log '%s'", CMD_ARGV[0]);
return ERROR_FAIL;
}
if (log_output != stderr && log_output != NULL) {
/* Close previous log file, if it was open and wasn't stderr. */
fclose(log_output);
}
log_output = file;
}
return ERROR_OK;