mirror of
https://github.com/ibm-s390-linux/s390-tools.git
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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>
87 lines
1.7 KiB
C
87 lines
1.7 KiB
C
/*
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* tape_390 - Common functions
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*
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* Copyright IBM Corp. 2006, 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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#include <fcntl.h>
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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 <sys/stat.h>
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#include <sys/sysmacros.h>
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#include "tape390_common.h"
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#define PROC_DEVICES_FILE "/proc/devices"
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#define PROC_DEVICES_FILE_WIDTH 100
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char *prog_name; /* Name of tool */
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/*
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* Set name of tool
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*/
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void set_prog_name(char *name)
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{
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prog_name = name;
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}
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/*
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* Check whether specified device node is tape device
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*/
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int is_not_tape(char *device)
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{
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FILE* fh;
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char line[PROC_DEVICES_FILE_WIDTH];
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char last_line[PROC_DEVICES_FILE_WIDTH];
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int found = 0;
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struct stat stat_struct;
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if (stat(device, &stat_struct)) {
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ERRMSG("%s: Unable to get device status for "
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"'%s'. \n", prog_name, device);
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perror("");
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return 1;
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}
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fh = fopen(PROC_DEVICES_FILE,"r");
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if (!fh) {
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ERRMSG("%s: WARNING: Cannot check for tape in file "
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PROC_DEVICES_FILE ".\n", prog_name);
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perror("");
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return(0); /* check not possible, just continue */
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}
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while (!found && (fscanf(fh, "%s", line) != EOF)) {
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if (strcmp(line, "tape") == 0)
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found = 1;
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else
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strcpy(last_line, line);
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}
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fclose(fh);
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if (found && (major(stat_struct.st_rdev) ==
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(unsigned int) atoi(last_line)))
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return (0);
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else {
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ERRMSG("%s: '%s' is not a tape device. \n", prog_name, device);
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return 1;
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}
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}
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/*
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* Open the tape device
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*/
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int open_tape(char *device)
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{
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int fd;
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fd = open(device,O_RDONLY);
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if (fd < 0) {
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ERRMSG("%s: Cannot open device %s.\n",
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prog_name,device);
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perror("");
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exit(EXIT_MISUSE);
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}
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return fd;
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}
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