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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! # We need mdev executable to be in chroot jail!
# (will still fail with dynamically linked one, though...) # (will still fail with dynamically linked one, though...)
cp ../busybox mdev.testdir/mdev 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/etc
mkdir mdev.testdir/dev mkdir mdev.testdir/dev
mkdir -p mdev.testdir/sys/block/sda 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 # clean up
rm -rf mdev.testdir 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); mode = strtoul(val, NULL, 8);
/* 4th field (opt): >alias */ /* 4th field (opt): >alias */
if (ENABLE_FEATURE_MDEV_RENAME) { #if ENABLE_FEATURE_MDEV_RENAME
if (!next) if (!next)
break; break;
if (*next == '>') {
#if ENABLE_FEATURE_MDEV_RENAME_REGEXP
char *s, *p;
unsigned i, n;
val = next; val = next;
next = next_field(val); next = next_field(val);
if (*val == '>') { /* substitute %1..9 with off[1..9], if any */
#if ENABLE_FEATURE_MDEV_RENAME_REGEXP n = 0;
/* substitute %1..9 with off[1..9], if any */ s = val;
char *s, *p; while (*s && *s++ == '%')
unsigned i, n; n++;
n = 0; p = alias = xzalloc(strlen(val) + n * strlen(device_name));
s = val; s = val + 1;
while (*s && *s++ == '%') while (*s) {
n++; *p = *s;
if ('%' == *s) {
p = alias = xzalloc(strlen(val) + n * strlen(device_name)); i = (s[1] - '0');
s = val + 1; if (i <= 9 && off[i].rm_so >= 0) {
while (*s) { n = off[i].rm_eo - off[i].rm_so;
*p = *s; strncpy(p, device_name + off[i].rm_so, n);
if ('%' == *s) { p += n - 1;
i = (s[1] - '0'); s++;
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 p++;
alias = xstrdup(val + 1); s++;
#endif
} }
#else
val = next;
next = next_field(val);
alias = xstrdup(val + 1);
#endif
} }
#endif /* ENABLE_FEATURE_MDEV_RENAME */
/* The rest (opt): command to run */ /* The rest (opt): command to run */
if (!next) if (!next)