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	insmod.c - ubase - suckless linux base utils
	git clone git://git.suckless.org/ubase
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	---
	insmod.c (1141B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <sys/stat.h>
	3 #include <sys/syscall.h>
	4
	5 #include <fcntl.h>
	6 #include <stdio.h>
	7 #include <stdlib.h>
	8 #include <string.h>
	9 #include <unistd.h>
	10
	11 #include "util.h"
	12
	13 static void
	14 usage(void)
	15 {
	16 eprintf("usage: %s filename [args...]\n", argv0);
	17 }
	18
	19 int
	20 main(int argc, char *argv[])
	21 {
	22 char buf = NULL, opts = NULL;
	23 size_t blen, plen = 0;
	24 int i, fd;
	25 ssize_t n;
	26 struct stat sb;
	27
	28 ARGBEGIN {
	29 default:
	30 usage();
	31 } ARGEND;
	32
	33 if (argc < 1)
	34 usage();
	35
	36 fd = open(argv[0], O_RDONLY);
	37 if (fd < 0)
	38 eprintf("open %s:", argv[0]);
	39 if (fstat(fd, &sb) < 0)
	40 eprintf("stat %s:", argv[0]);
	41 blen = sb.st_size;
	42 buf = emalloc(blen);
	43
	44 n = read(fd, buf, blen);
	45 if (n < 0 \|\| (size_t)n != blen)
	46 eprintf("read:");
	47
	48 argc--;
	49 argv++;
	50
	51 for (i = 0; i < argc; i++)
	52 plen += strlen(argv[i]);
	53 if (plen > 0) {
	54 plen += argc;
	55 opts = ecalloc(1, plen);
	56 for (i = 0; i < argc; i++) {
	57 strcat(opts, argv[i]);
	58 if (i + 1 < argc)
	59 strcat(opts, " ");
	60 }
	61 }
	62
	63 if (syscall(__NR_init_module, buf, blen, !opts ? "" : opts) < 0)
	64 eprintf("init_module:");
	65
	66 free(opts);
	67 free(buf);
	68 return 0;
	69 }