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[PATCH] udev - introduce format escape char

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This patch adds a '%' to the format char list, so that a external
program may called with a non expanded '%' like:

  PROGRAM="/bin/date +%%s"

Olaf Hering asked for the feature.
A tricky test is also added :)
This commit is contained in:
kay.sievers@vrfy.org 2004-01-13 18:34:33 -08:00 committed by Greg KH
parent e68faf511d
commit 8ffb636f01
2 changed files with 21 additions and 7 deletions
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19
namedev.c
View File

@ -151,20 +151,21 @@ static mode_t get_default_mode(struct sysfs_class_device *class_dev)
static void apply_format(struct udevice *udev, unsigned char *string)
{
char name[NAME_SIZE];
char temp[NAME_SIZE];
char temp1[NAME_SIZE];
char *tail;
char *pos;
char *pos2;
char *pos3;
int num;
pos = string;
while (1) {
num = 0;
pos = strchr(string, '%');
pos = strchr(pos, '%');
if (pos) {
*pos = '\0';
pos[0] = '\0';
tail = pos+1;
if (isdigit(tail[0])) {
num = (int) strtoul(&pos[1], &tail, 10);
@ -173,7 +174,7 @@ static void apply_format(struct udevice *udev, unsigned char *string)
break;
}
}
strfieldcpy(name, tail+1);
strfieldcpy(temp, tail+1);
switch (tail[0]) {
case 'b':
@ -217,8 +218,8 @@ static void apply_format(struct udevice *udev, unsigned char *string)
break;
if (num) {
/* get part of return string */
strncpy(temp, udev->program_result, sizeof(temp));
pos2 = temp;
strncpy(temp1, udev->program_result, sizeof(temp1));
pos2 = temp1;
while (num) {
num--;
pos3 = strsep(&pos2, " ");
@ -236,11 +237,15 @@ static void apply_format(struct udevice *udev, unsigned char *string)
dbg("substitute result string '%s'", udev->program_result);
}
break;
case '%':
strcat(pos, "%");
pos++;
break;
default:
dbg("unknown substitution type '%%%c'", pos[1]);
break;
}
strcat(string, name);
strcat(string, temp);
} else
break;
}

9
test/udev-test.pl
View File

@ -203,6 +203,15 @@ EOF
expected => "test-0:0:0:0" ,
conf => <<EOF
BUS="scsi", PROGRAM="/bin/echo -n test-%b", RESULT="test-0:0*", NAME="%c"
EOF
},
{
desc => "program with escaped format char (tricky: callout returns format char!)",
subsys => "block",
devpath => "block/sda/sda3",
expected => "escape-3" ,
conf => <<EOF
BUS="scsi", PROGRAM="/bin/echo -n escape-%%n", KERNEL="sda3", NAME="%c"
EOF
},
{