1 /******************************************************************************
3 * Module Name: cfsize - Common get file size function
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2014, Intel Corp.
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
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44 #include <acpi/acpi.h>
49 #define _COMPONENT ACPI_TOOLS
50 ACPI_MODULE_NAME("cmfsize")
52 /*******************************************************************************
54 * FUNCTION: cm_get_file_size
56 * PARAMETERS: file - Open file descriptor
58 * RETURN: File Size. On error, -1 (ACPI_UINT32_MAX)
60 * DESCRIPTION: Get the size of a file. Uses seek-to-EOF. File must be open.
61 * Does not disturb the current file pointer. Uses perror for
64 ******************************************************************************/
65 u32
cm_get_file_size(FILE * file
)
70 /* Save the current file pointer, seek to EOF to obtain file size */
72 current_offset
= ftell(file
);
73 if (current_offset
< 0) {
77 if (fseek(file
, 0, SEEK_END
)) {
81 file_size
= ftell(file
);
86 /* Restore original file pointer */
88 if (fseek(file
, current_offset
, SEEK_SET
)) {
92 return ((u32
)file_size
);
95 perror("Could not get file offset");
96 return (ACPI_UINT32_MAX
);
99 perror("Could not seek file");
100 return (ACPI_UINT32_MAX
);