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mdev: fix a bug where we were eating argv[0] of helper

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This commit is contained in:
Denis Vlasenko 2008-05-02 13:21:24 +00:00
parent 6da9b00f4f
commit 32dcc53b71
2 changed files with 48 additions and 30 deletions
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16
testsuite/mdev.tests
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@ -18,6 +18,8 @@ mkdir mdev.testdir
# We need mdev executable to be in chroot jail!
# (will still fail with dynamically linked one, though...)
cp ../busybox mdev.testdir/mdev
mkdir mdev.testdir/bin
cp ../busybox mdev.testdir/bin/sh 2>/dev/null # for testing cmd feature
mkdir mdev.testdir/etc
mkdir mdev.testdir/dev
mkdir -p mdev.testdir/sys/block/sda
@ -93,6 +95,20 @@ brw-r--r-- 1 0 0 a_sda
" \
"" ""
# continuing to use directory structure from prev test
rm -rf mdev.testdir/dev/*
# here we complicate things by having non-matching group 1 and using %0
echo "sda 0:0 644 @echo @echo TEST" >mdev.testdir/etc/mdev.conf
testing "mdev command" \
"env - ACTION=add DEVPATH=/block/sda chroot mdev.testdir /mdev 2>&1;
ls -lnR mdev.testdir/dev | $FILTER_LS" \
"\
@echo TEST
mdev.testdir/dev:
brw-r--r-- 1 0 0 8,0 sda
" \
"" ""
# clean up
rm -rf mdev.testdir

62
util-linux/mdev.c
View File

@ -156,43 +156,45 @@ static void make_device(char *path, int delete)
mode = strtoul(val, NULL, 8);
/* 4th field (opt): >alias */
if (ENABLE_FEATURE_MDEV_RENAME) {
if (!next)
break;
#if ENABLE_FEATURE_MDEV_RENAME
if (!next)
break;
if (*next == '>') {
#if ENABLE_FEATURE_MDEV_RENAME_REGEXP
char *s, *p;
unsigned i, n;
val = next;
next = next_field(val);
if (*val == '>') {
#if ENABLE_FEATURE_MDEV_RENAME_REGEXP
/* substitute %1..9 with off[1..9], if any */
char *s, *p;
unsigned i, n;
/* substitute %1..9 with off[1..9], if any */
n = 0;
s = val;
while (*s && *s++ == '%')
n++;
n = 0;
s = val;
while (*s && *s++ == '%')
n++;
p = alias = xzalloc(strlen(val) + n * strlen(device_name));
s = val + 1;
while (*s) {
*p = *s;
if ('%' == *s) {
i = (s[1] - '0');
if (i <= 9 && off[i].rm_so >= 0) {
n = off[i].rm_eo - off[i].rm_so;
strncpy(p, device_name + off[i].rm_so, n);
p += n - 1;
s++;
}
p = alias = xzalloc(strlen(val) + n * strlen(device_name));
s = val + 1;
while (*s) {
*p = *s;
if ('%' == *s) {
i = (s[1] - '0');
if (i <= 9 && off[i].rm_so >= 0) {
n = off[i].rm_eo - off[i].rm_so;
strncpy(p, device_name + off[i].rm_so, n);
p += n - 1;
s++;
}
p++;
s++;
}
#else
alias = xstrdup(val + 1);
#endif
p++;
s++;
}
#else
val = next;
next = next_field(val);
alias = xstrdup(val + 1);
#endif
}
#endif /* ENABLE_FEATURE_MDEV_RENAME */
/* The rest (opt): command to run */
if (!next)