85 lines
3.3 KiB
C
85 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include "common.h"
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/* basename of this program, as reported by argv[0] */
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const char prog_name[] = "nvramtool";
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/* version of this program */
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const char prog_version[] = "2.1";
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/****************************************************************************
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* get_line_from_file
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*
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* Get a line of input from file 'f'. Store result in 'line' which is an
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* array of 'line_buf_size' bytes.
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****************************************************************************/
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int get_line_from_file(FILE * f, char line[], int line_buf_size)
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{
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if (fgets(line, line_buf_size, f) == NULL)
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return LINE_EOF;
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/* If the file contains a line that is too long, then it's best
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* to let the user know right away rather than passing back a
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* truncated result that will lead to problems later on.
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*/
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return (strlen(line) == ((size_t) (line_buf_size - 1))) ?
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LINE_TOO_LONG : OK;
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}
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/****************************************************************************
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* out_of_memory
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*
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* We ran out of memory. Print an error message and die.
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****************************************************************************/
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noreturn void out_of_memory(void)
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{
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fprintf(stderr, "%s: Out of memory.\n", prog_name);
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exit(1);
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}
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/****************************************************************************
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* usage
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*
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* Write a usage message to 'outfile'. If 'outfile' is 'stderr' then exit
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* with a value of 1. Otherwise exit with a value of 0.
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****************************************************************************/
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void usage(FILE * outfile)
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{
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fprintf(outfile,
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"Usage: %s [-y LAYOUT_FILE | -t] PARAMETER ...\n\n"
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" Read/write coreboot parameters or show info from "
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"coreboot table.\n\n"
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" -y LAYOUT_FILE: Use CMOS layout specified by "
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"LAYOUT_FILE.\n"
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" -t: Use CMOS layout specified by CMOS option "
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"table.\n"
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" -C CBFS_FILE: Use CBFS file for layout and CMOS data.\n"
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" -D CMOS_FILE: Use CMOS file for CMOS data (overrides CMOS of -C).\n"
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" [-n] -r NAME: Show parameter NAME. If -n is given, "
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"show value only.\n"
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" -e NAME: Show all possible values for parameter "
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"NAME.\n"
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" -a: Show names and values for all "
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"parameters.\n"
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" -w NAME=VALUE: Set parameter NAME to VALUE.\n"
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" -p INPUT_FILE: Set parameters according to INPUT_FILE.\n"
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" -i: Same as -p but file contents taken from "
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"standard input.\n"
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" -c [VALUE]: Show CMOS checksum or set checksum to "
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"VALUE.\n"
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" -l [ARG]: Show coreboot table info for ARG, or "
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"all ARG choices.\n"
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" -L OUTPUT_BIN Write CMOS layout file in binary format\n"
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" -H OUTPUT_HDR Write CMOS layout file in header format\n"
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" -d: Show low-level dump of coreboot table.\n"
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" -Y: Show CMOS layout info.\n"
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" -b OUTPUT_FILE: Dump CMOS memory contents to file.\n"
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" -B INPUT_FILE: Write file contents to CMOS memory.\n"
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" -x: Show hex dump of CMOS memory.\n"
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" -X DUMPFILE: Show hex dump of CMOS dumpfile.\n"
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" -v: Show version info for this program.\n"
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" -h: Show this message.\n", prog_name);
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exit(outfile == stderr);
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}
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