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Add SIGINT handler to gpart restore action.

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MFC after:	1 week
This commit is contained in:
Andrey V. Elsukov 2010-11-22 11:24:11 +00:00
parent 80085938d4
commit 68f7502341
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=215672
1 changed files with 20 additions and 1 deletions
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21
sbin/geom/class/part/geom_part.c
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@ -38,6 +38,7 @@ __FBSDID("$FreeBSD$");
#include <libgeom.h>
#include <libutil.h>
#include <paths.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
@ -61,6 +62,7 @@ uint32_t PUBSYM(version) = 0;
static char sstart[32];
static char ssize[32];
volatile sig_atomic_t undo_restore;
#define GPART_AUTOFILL "*"
#define GPART_FLAGS "C"
@ -756,6 +758,12 @@ skip_line(const char *p)
return (1);
}
static void
gpart_sighndl(int sig __unused)
{
undo_restore = 1;
}
static void
gpart_restore(struct gctl_req *req, unsigned int fl __unused)
{
@ -763,6 +771,7 @@ gpart_restore(struct gctl_req *req, unsigned int fl __unused)
struct gclass *classp;
struct gctl_req *r;
struct ggeom *gp;
struct sigaction si_sa;
const char *s, *flags, *errstr, *label;
char **ap, *argv[6], line[BUFSIZ], *pline;
int error, forced, i, l, nargs, created, rl;
@ -786,6 +795,13 @@ gpart_restore(struct gctl_req *req, unsigned int fl __unused)
geom_deletetree(&mesh);
errx(EXIT_FAILURE, "Class %s not found.", s);
}
sigemptyset(&si_sa.sa_mask);
si_sa.sa_flags = 0;
si_sa.sa_handler = gpart_sighndl;
if (sigaction(SIGINT, &si_sa, 0) == -1)
err(EXIT_FAILURE, "sigaction SIGINT");
if (forced) {
/* destroy existent partition table before restore */
for (i = 0; i < nargs; i++) {
@ -811,7 +827,8 @@ gpart_restore(struct gctl_req *req, unsigned int fl __unused)
}
}
created = 0;
while (fgets(line, sizeof(line) - 1, stdin)) {
while (undo_restore == 0 &&
fgets(line, sizeof(line) - 1, stdin) != NULL) {
/* Format of backup entries:
* <scheme name> <number of entries>
* <index> <type> <start> <size> [label] ['['attrib[,attrib]']']
@ -920,6 +937,8 @@ gpart_restore(struct gctl_req *req, unsigned int fl __unused)
}
}
}
if (undo_restore)
goto backout;
/* commit changes if needed */
if (strchr(flags, 'C') != NULL) {
for (i = 0; i < nargs; i++) {