65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
#include <common.h>
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#include <command.h>
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#include <fs.h>
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#include <malloc.h>
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#include <linux/stat.h>
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#include <linux/ctype.h>
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#include <environment.h>
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static int do_readf(int argc, char *argv[])
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{
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unsigned char *buf = NULL, *val;
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char *variable, *filename;
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struct stat s;
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size_t size;
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int ret, i;
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if (argc != 3)
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return COMMAND_ERROR_USAGE;
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filename = argv[1];
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variable = argv[2];
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ret = stat(filename, &s);
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if (ret)
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goto out;
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if (s.st_size > 1024) {
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ret = -EFBIG;
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goto out;
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}
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buf = read_file(filename, &size);
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if (!buf)
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goto out;
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for (i = 0; i < size; i++) {
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if (!isprint(buf[i])) {
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buf[i] = '\0';
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break;
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}
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}
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val = strim(buf);
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ret = setenv(variable, val);
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out:
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free(buf);
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return ret;
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}
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BAREBOX_CMD_HELP_START(readf)
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BAREBOX_CMD_HELP_USAGE("readf <file> <variable>\n")
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BAREBOX_CMD_HELP_SHORT("Read a single line of a file into a shell variable. Leading and trailing whitespaces\n")
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BAREBOX_CMD_HELP_SHORT("are removed, nonvisible characters are stripped. Input is limited to 1024\n")
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BAREBOX_CMD_HELP_SHORT("characters.\n")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(readf)
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.cmd = do_readf,
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.usage = "read file into variable",
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BAREBOX_CMD_GROUP(CMD_GRP_SCRIPT)
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BAREBOX_CMD_HELP(cmd_readf_help)
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BAREBOX_CMD_END
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