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c39722aff2
Use the directory specified by the shell environment variable TMPDIR for temporary objects creation and ngdump job simulation. If TMPDIR is not set, then use "/tmp" for the mentioned purposes; While running ngdump job in 'dry-run' mode: . Don't format/mount the target dump device. Instead, create the bootmap file and the meta-file at the temporary mount point without mounting anything to it. Thus, the mentioned files to be acrually created in the "proxy" file system owning the temporary mount point; . Retrieve base disk info from the read-only dump device and complete that info with the block size of the proxy file system; Separate the steps on retrieving/setting file system block size into a dedicated procedure; Use definitions instead of hardcoded file names; Fix a bug in an error path (accessing freed memory); Make misc_open_simulate() and misc_open_exclusive() static; Update man pages with the requirements on the system environment (resources) for ngdump job being executed in dry-run mode; Provide hints for user (in stderr) in case when ngdump job in dry-run mode failed due to inappropriate system environment. Tested-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Reviewed-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Signed-off-by: Eduard Shishkin <edward6@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
/*
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* s390-tools/zipl/include/misc.h
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* Miscellaneous helper functions.
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*
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* Copyright IBM Corp. 2001, 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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*/
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#ifndef MISC_H
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#define MISC_H
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#include <sys/types.h>
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#include <unistd.h>
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#include "zipl.h"
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struct misc_file_buffer {
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char* buffer;
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off_t pos;
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size_t length;
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};
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struct misc_fd {
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int fd;
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unsigned int simulate_write:1;
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};
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void* misc_malloc(size_t size);
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int misc_asprintf(char **out, const char *fmt, ...);
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void* misc_calloc(size_t n, size_t size);
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char* misc_strdup(const char* s);
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int misc_open_device(const char *filename, struct misc_fd *mfd, int simulate);
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int misc_read(int fd, void* buffer, size_t count);
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int misc_read_file(const char* filename, char** buffer, size_t* size,
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int nil_terminate);
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int misc_read_special_file(const char* filename, char** buffer, size_t* size,
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int nil_terminate);
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int misc_write(int fd, const void* data, size_t count);
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int misc_write_or_simulate(struct misc_fd *mfd, const void *data, size_t count);
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int misc_pwrite(int fd, void *buf, size_t size, off_t off);
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int misc_seek(int fd, off_t off);
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int misc_get_file_buffer(const char* filename,
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struct misc_file_buffer* buffer);
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void misc_free_file_buffer(struct misc_file_buffer* file);
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int misc_get_char(struct misc_file_buffer* file, off_t readahead);
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char *misc_make_path(const char *dirname, char *filename);
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int misc_temp_dev(dev_t dev, int blockdev, char** devno);
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int misc_temp_dev_from_file(char* file, char** devno);
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void misc_free_temp_dev(char* device);
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void misc_free_temp_file(char *filename);
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int misc_check_writable_directory(const char* directory);
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int misc_check_readable_file(const char* filename);
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int misc_check_writable_device(const char* devno, int blockdev, int chardev);
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void misc_ebcdic_to_ascii(unsigned char *from, unsigned char *to);
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void misc_ascii_to_ebcdic(unsigned char *from, unsigned char *to);
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unsigned int misc_check_secure_boot(void);
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#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
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#endif /* not MISC_H */
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