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b627b8d8e1
This commit is based on the s390-tools-1.39.0 version. Changes on top of s390-tools-1.39.0: - Add MIT license to all source files - Add LICENSE file - Transform REAMDE to README.md (markdown) - Add AUTHORS.md file - Add CONTRIBUTING.md file - Move changelog from README to CHANGELOG.md file Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/**
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* util_file_example - Example program for util_file
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*
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* Copyright IBM Corp. 2016, 2017
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "lib/util_file.h"
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/*
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* Write buffer to file and read it back again
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*/
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int main(void)
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{
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char buf_wr[4096], buf_rd[4096];
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unsigned long long value_ull;
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long value_l;
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/* Generate input */
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sprintf(buf_wr, "Say something interesting!\nSecond line\n");
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printf("Write.....:\n%s", buf_wr);
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/* Write string to file */
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if (util_file_write_s(buf_wr, "/tmp/%s", "testfile")) {
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perror("util_file_write_s failed\n");
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return EXIT_FAILURE;
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}
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/* Read back first line of file */
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if (util_file_read_line(buf_rd, sizeof(buf_rd), "/tmp/%s", "testfile")) {
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perror("util_file_read_line failed\n");
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return EXIT_FAILURE;
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}
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printf("Read......: %s\n", buf_rd);
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/* Write long to file */
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printf("Write.....: %ld\n", 4711L);
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if (util_file_write_l(4711L, 10, "/tmp/%s", "testfile")) {
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perror("util_file_write failed\n");
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return EXIT_FAILURE;
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}
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/* Read back long from file */
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if (util_file_read_l(&value_l, 10, "/tmp/%s", "testfile")) {
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perror("util_file_read_l failed\n");
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return EXIT_FAILURE;
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}
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printf("Read......: %ld\n", value_l);
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/* Write long long hexadecimal to file */
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printf("Write.....: 0x%llx\n", 0x4712ULL);
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if (util_file_write_ull(0x4712ULL, 16, "/tmp/%s", "testfile")) {
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perror("util_file_write failed\n");
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return EXIT_FAILURE;
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}
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/* Read back long long hexadecimal from file */
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if (util_file_read_ull(&value_ull, 16, "/tmp/%s", "testfile")) {
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perror("util_file_read_ull failed\n");
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return EXIT_FAILURE;
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}
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printf("Read......: 0x%llx\n", value_ull);
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/* Remove file */
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unlink("/tmp/testfile");
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return EXIT_SUCCESS;
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}
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//! [code]
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