#include "util.h"
#include "pathconfig.h"
+#include <lib/internal.h>
+
#include <getopt.h>
#include <fcntl.h>
#include <errno.h>
"the current root-dir while destinations are expected in the chroot environment.\n\n"
"For non-trivial mount-operations it uses the external 'mount' program which\n"
"can be overridden by the $MOUNT environment variable.\n\n"
+ "Options:\n"
+ " --bind|move|rbind ... set the correspond flags; with this options\n"
+ " the mount will be executed internally without\n"
+ " calling an external mount program.\n"
+ " -t <type> ... assume the given filesystem type\n"
+ " -o <options> ... set additional options; see mount(2) for details\n"
+ " -n ... do not update the mtab-file\n"
+ " --mtab <filename> ... use <filename> as an alternative mtab file\n"
+ " [default: /etc/mtab]\n"
+ " --chroot ... chroot into the current directory before\n"
+ " mounting the filesystem\n"
+ " --fstab <filename> ... use <filename> as an alternative fstab file;\n"
+ " this option has an effect only with the '-a'\n"
+ " option [default: /etc/fstab]\n"
+ " -a ... mount everything listed in the fstab-file\n\n"
+ " <src> ... the source-filesystem; this path is absolute\n"
+ " to the current root-filesystem. Only valid\n"
+ " without the '-a' option.\n"
+ " <dst> ... the destination mount-point; when used with\n"
+ " '--chroot', this path is relative to the current\n"
+ " directory. Only valid without the '-a' option\n\n"
"Please report bugs to " PACKAGE_BUGREPORT "\n");
exit(res);
}
static bool
-transformOptionList(struct MountInfo *info)
+transformOptionList(struct MountInfo *info, size_t UNUSED *col)
{
char const * ptr = info->data;
#define MOVE_TO_NEXT_FIELD(PTR,ALLOW_EOL) \
while (!isspace(*PTR) && *PTR!='\0') ++PTR; \
+ if (col) *col = buf-start_buf+1; \
if (!(ALLOW_EOL) && *PTR=='\0') return prFAIL; \
*PTR++ = '\0'; \
while (isspace(*PTR)) ++PTR
static enum {prDOIT, prFAIL, prIGNORE}
-parseFstabLine(struct MountInfo *info, char *buf)
+ parseFstabLine(struct MountInfo *info, char *buf, size_t *col)
{
+ char const * const start_buf = buf;
+ size_t err_col;
+
while (isspace(*buf)) ++buf;
if (*buf=='#' || *buf=='\0') return prIGNORE;
MOVE_TO_NEXT_FIELD(buf, false);
info->type = buf;
MOVE_TO_NEXT_FIELD(buf, false);
+ err_col = buf-start_buf+1;
info->data = buf;
MOVE_TO_NEXT_FIELD(buf, true);
if (strcmp(info->type, "swap")==0) return prIGNORE;
if (strcmp(info->type, "none")==0) info->type = 0;
- info->flag = 0;
- info->xflag = 0;
- if (!transformOptionList(info)) return prFAIL;
- if (info->xflag & XFLAG_NOAUTO) return prIGNORE;
+ info->flag = 0;
+ info->xflag = 0;
+ if (col) *col = err_col;
+ if (!transformOptionList(info,col)) return prFAIL;
+ if (info->xflag & XFLAG_NOAUTO) return prIGNORE;
return prDOIT;
}
#undef MOVE_TO_NEXT_FIELD
+static void
+showFstabPosition(int fd, char const *fname, size_t line_nr, size_t col_nr)
+{
+ char buf[3*sizeof(line_nr)*2 + 4];
+ size_t len = utilvserver_fmt_uint(buf+1, line_nr)+1;
+
+ buf[0] = ':';
+ buf[len++] = ':';
+ len += utilvserver_fmt_uint(buf+len, col_nr);
+ WRITE_STR(fd, fname);
+ write(fd, buf, len);
+}
+
+
static bool
mountFstab(struct Options const *opt)
{
goto err0;
}
- len = lseek(fd, 0, SEEK_END);
+ len = lseek(fd, 0, SEEK_END);
if (len==-1 ||
lseek(fd, 0, SEEK_SET)==-1) {
perror("secure-mount: lseek(<fstab>)");
{
char buf[len+2];
char *ptr, *ptrptr;
+ size_t line_nr=0, col_nr;
if (read(fd, buf, len+1)!=len) {
perror("secure-mount: read()");
buf[len] = '#'; // workaround for broken dietlibc strtok_r()
// implementation
buf[len+1] = '\0';
+ ptrptr = buf;
- ptr = strtok_r(buf, "\n", &ptrptr);
- while (ptr) {
+ while ((ptr=strsep(&ptrptr, "\n")) != 0) {
struct MountInfo mnt;
- char * new_ptr = strtok_r(0, "\n", &ptrptr);
+ ++line_nr;
- switch (parseFstabLine(&mnt, ptr)) {
+ switch (parseFstabLine(&mnt, ptr, &col_nr)) {
case prFAIL :
- WRITE_MSG(2, "Failed to parse fstab-line beginning with '");
- WRITE_STR(2, ptr);
- WRITE_MSG(2, "'\n");
+ showFstabPosition(2, opt->fstab, line_nr, col_nr);
+ WRITE_MSG(2, ": syntax error\n");
goto err1;
case prIGNORE : break;
case prDOIT :
chdir("/");
if (!mountSingle(&mnt, opt)) {
- WRITE_MSG(2, "Failed to mount fstab-line beginning with '");
- WRITE_STR(2, ptr);
- WRITE_MSG(2, "'\n");
+ showFstabPosition(2, opt->fstab, line_nr, 1);
+ WRITE_MSG(2, ": failed to mount fstab-entry\n");
}
break;
default :
assert(false);
}
-
- ptr = new_ptr;
}
}
if (mnt.data) {
mnt.data = strdup(mnt.data);
- if (!transformOptionList(&mnt)) {
+ if (!transformOptionList(&mnt, 0)) {
WRITE_MSG(2, "Invalid options specified\n");
return EXIT_FAILURE;
}