98 lines
1.8 KiB
C
98 lines
1.8 KiB
C
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <malloc.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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extern int init_module(void *, unsigned long, const char *);
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static void *read_file(const char *filename, ssize_t *_size)
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{
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int ret, fd;
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struct stat sb;
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ssize_t size;
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void *buffer = NULL;
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/* open the file */
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fd = open(filename, O_RDONLY);
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if (fd < 0)
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return NULL;
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/* find out how big it is */
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if (fstat(fd, &sb) < 0)
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goto bail;
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size = sb.st_size;
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/* allocate memory for it to be read into */
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buffer = malloc(size);
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if (!buffer)
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goto bail;
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/* slurp it into our buffer */
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ret = read(fd, buffer, size);
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if (ret != size)
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goto bail;
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/* let the caller know how big it is */
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*_size = size;
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bail:
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close(fd);
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return buffer;
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}
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#define min(x,y) ((x) < (y) ? (x) : (y))
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int insmod_main(int argc, char **argv)
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{
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void *file;
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ssize_t size = 0;
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char opts[1024];
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int ret;
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/* make sure we've got an argument */
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if (argc < 2) {
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fprintf(stderr, "usage: insmod <module.o>\n");
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return -1;
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}
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/* read the file into memory */
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file = read_file(argv[1], &size);
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if (!file) {
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fprintf(stderr, "insmod: can't open '%s'\n", argv[1]);
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return -1;
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}
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opts[0] = '\0';
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if (argc > 2) {
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int i, len;
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char *end = opts + sizeof(opts) - 1;
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char *ptr = opts;
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for (i = 2; (i < argc) && (ptr < end); i++) {
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len = min(strlen(argv[i]), end - ptr);
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memcpy(ptr, argv[i], len);
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ptr += len;
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*ptr++ = ' ';
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}
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*(ptr - 1) = '\0';
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}
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/* pass it to the kernel */
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ret = init_module(file, size, opts);
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if (ret != 0) {
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fprintf(stderr,
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"insmod: init_module '%s' failed (%s)\n",
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argv[1], strerror(errno));
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}
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/* free the file buffer */
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free(file);
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return ret;
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}
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