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Build: $ make -C libutil/util_log_example * Every time a -V option is passed, the verbosity level increases and extra messages are enabled. Test: $ ./libutil/util_log_example # No output $ ./libutil/util_log_example -V ERROR: This is an ERROR message $ ./libutil/util_log_example -VV ERROR: This is an ERROR message WARN: This is a WARN message $ ./libutil/util_log_example -VVV ERROR: This is an ERROR message WARN: This is a WARN message INFO: This is an INFO message $ ./libutil/util_log_example -VVVV ERROR: This is an ERROR message WARN: This is a WARN message INFO: This is an INFO message DEBUG: This is a DEBUG message $ ./libutil/util_log_example -VVVVV ERROR: This is an ERROR message WARN: This is a WARN message INFO: This is an INFO message DEBUG: This is a DEBUG message TRACE: This is a TRACE message Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com> Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com> Reviewed-by: Philipp Rudo <prudo@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
/**
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* util_log_example - Example program for util_log
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*
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* Copyright IBM Corp. 2021
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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//! [code]
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#include "lib/util_opt.h"
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#include "lib/util_prg.h"
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#include "lib/util_log.h"
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static const struct util_prg prg = {
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.desc = "Example for util_log.",
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.copyright_vec = {
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{
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.owner = "IBM Corp.",
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.pub_first = 2021,
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.pub_last = 2021,
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},
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UTIL_PRG_COPYRIGHT_END
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}
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};
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static struct util_opt opt_vec[] = {
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{
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.option = { "verbose", no_argument, NULL, 'V' },
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.desc = "Print verbose messages to stderr. "
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"This option may be given multiple times and "
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"each time this option is given the verbosity level is "
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"increased.",
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},
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UTIL_OPT_HELP,
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UTIL_OPT_VERSION,
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UTIL_OPT_END
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};
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int main(int argc, char *argv[])
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{
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int verbose = -1;
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util_prg_init(&prg);
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util_opt_init(opt_vec, NULL);
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while (1) {
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int opt = util_opt_getopt_long(argc, argv);
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if (opt == -1)
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break;
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switch (opt) {
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case 'h':
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util_prg_print_help();
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util_opt_print_help();
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exit(EXIT_SUCCESS);
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case 'v':
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util_prg_print_version();
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exit(EXIT_SUCCESS);
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case 'V':
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verbose++;
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break;
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case '?':
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default:
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fprintf(stderr, "Try '--help' for more information.\n");
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exit(EXIT_FAILURE);
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}
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}
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util_log_set_level(verbose);
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util_log_print(UTIL_LOG_ERROR, "This is an ERROR message\n");
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util_log_print(UTIL_LOG_WARN, "This is a WARN message\n");
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util_log_print(UTIL_LOG_INFO, "This is an INFO message\n");
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util_log_print(UTIL_LOG_DEBUG, "This is a DEBUG message\n");
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util_log_print(UTIL_LOG_TRACE, "This is a TRACE message\n");
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return EXIT_SUCCESS;
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}
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//! [code]
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