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Differential D38463 Diff 116870 tests/sys/fs/tarfs/mktar.c

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tests/sys/fs/tarfs/mktar.c

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#include <stdlib.h> #include <stdlib.h>
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
#include <unistd.h> #include <unistd.h>
#define PROGNAME "mktar" #define PROGNAME "mktar"
#define SUBDIRNAME "directory" #define SUBDIRNAME "directory"
#define EMPTYDIRNAME "empty"
#define NORMALFILENAME "file"
#define SPARSEFILENAME "sparse_file" #define SPARSEFILENAME "sparse_file"
#define HARDLINKNAME "hard_link" #define HARDLINKNAME "hard_link"
#define SHORTLINKNAME "short_link" #define SHORTLINKNAME "short_link"
#define LONGLINKNAME "long_link" #define LONGLINKNAME "long_link"
static bool opt_v; static bool opt_v;
static void verbose(const char *fmt, ...) static void verbose(const char *fmt, ...)
{ {
va_list ap; va_list ap;
if (!opt_v) if (!opt_v)
return; return;
fprintf(stderr, "%s: ", PROGNAME); fprintf(stderr, "%s: ", PROGNAME);
va_start(ap, fmt); va_start(ap, fmt);
vfprintf(stderr, fmt, ap); vfprintf(stderr, fmt, ap);
va_end(ap); va_end(ap);
fprintf(stderr, "\n"); fprintf(stderr, "\n");
} }
static void static void
mknormalfile(const char *filename, mode_t mode)
{
char buf[512];
ssize_t res;
int fd;
if ((fd = open(filename, O_RDWR|O_CREAT|O_EXCL, mode)) < 0)
err(1, "%s", filename);
for (unsigned int i = 0; i < sizeof(buf); i++)
buf[i] = 32 + i % 64;
res = write(fd, buf, sizeof(buf));
if (res < 0)
err(1, "%s", filename);
if (res != sizeof(buf))
errx(1, "%s: short write", filename);
close(fd);
}
static void
mksparsefile(const char *filename, mode_t mode) mksparsefile(const char *filename, mode_t mode)
{ {
char buf[511]; char buf[511];
ssize_t res; ssize_t res;
int fd; int fd;
if ((fd = open(filename, O_RDWR|O_CREAT|O_TRUNC, mode)) < 0) if ((fd = open(filename, O_RDWR|O_CREAT|O_EXCL, mode)) < 0)
err(1, "%s", filename); err(1, "%s", filename);
for (unsigned int i = 33; i <= 126; i++) { for (unsigned int i = 33; i <= 126; i++) {
memset(buf, i, sizeof(buf)); memset(buf, i, sizeof(buf));
if (lseek(fd, 1048576LU * (i - 32), SEEK_SET) < 0) if (lseek(fd, 1048576LU * (i - 32), SEEK_SET) < 0)
err(1, "%s", filename); err(1, "%s", filename);
res = write(fd, buf, sizeof(buf)); res = write(fd, buf, sizeof(buf));
if (res < 0) if (res < 0)
err(1, "%s", filename); err(1, "%s", filename);
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{ {
char *linktarget; char *linktarget;
/* create a subdirectory */ /* create a subdirectory */
verbose("mkdir %s", SUBDIRNAME); verbose("mkdir %s", SUBDIRNAME);
if (mkdir(SUBDIRNAME, 0755) != 0) if (mkdir(SUBDIRNAME, 0755) != 0)
err(1, "%s", SUBDIRNAME); err(1, "%s", SUBDIRNAME);
/* create a second subdirectory which will remain empty */
verbose("mkdir %s", EMPTYDIRNAME);
if (mkdir(EMPTYDIRNAME, 0755) != 0)
err(1, "%s", EMPTYDIRNAME);
/* create a normal file */
verbose("creating %s", NORMALFILENAME);
mknormalfile(NORMALFILENAME, 0644);
/* create a sparse file */ /* create a sparse file */
verbose("creating %s", SPARSEFILENAME); verbose("creating %s", SPARSEFILENAME);
mksparsefile(SPARSEFILENAME, 0644); mksparsefile(SPARSEFILENAME, 0644);
chflags(SPARSEFILENAME, UF_NODUMP); chflags(SPARSEFILENAME, UF_NODUMP);
/* create a hard link */ /* create a hard link */
verbose("link %s %s", SPARSEFILENAME, HARDLINKNAME); verbose("link %s %s", SPARSEFILENAME, HARDLINKNAME);
if (link(SPARSEFILENAME, HARDLINKNAME) != 0) if (link(SPARSEFILENAME, HARDLINKNAME) != 0)
▲ Show 20 Lines • Show All 76 Lines • ▼ Show 20 Lines if (pid == 0) {
execlp("tar", "tar", execlp("tar", "tar",
"-c", "-c",
"-f", tarfilename, "-f", tarfilename,
"-C", dirname, "-C", dirname,
"--zstd", "--zstd",
#if 0 #if 0
"--options", "zstd:frame-per-file", "--options", "zstd:frame-per-file",
#endif #endif
".", "./" EMPTYDIRNAME "/../" NORMALFILENAME,
"./" SPARSEFILENAME,
"./" HARDLINKNAME,
"./" SHORTLINKNAME,
"./" SUBDIRNAME,
"./" LONGLINKNAME,
NULL); NULL);
err(1, "execlp()"); err(1, "execlp()");
} }
if (waitpid(pid, &wstatus, 0) < 0) if (waitpid(pid, &wstatus, 0) < 0)
err(1, "waitpid()"); err(1, "waitpid()");
if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus) != 0) if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus) != 0)
errx(1, "child failed"); errx(1, "child failed");
/* fork a child to delete everything */ /* fork a child to delete everything */
if ((pid = fork()) < 0) if ((pid = fork()) < 0)
err(1, "fork()"); err(1, "fork()");
if (pid == 0) { if (pid == 0) {
verbose("cd %s", dirname); verbose("cd %s", dirname);
if (chdir(dirname) != 0) if (chdir(dirname) != 0)
err(1, "%s", dirname); err(1, "%s", dirname);
verbose("rm %s", LONGLINKNAME); verbose("rm %s", LONGLINKNAME);
(void)unlink(LONGLINKNAME); (void)unlink(LONGLINKNAME);
verbose("rm %s", SHORTLINKNAME); verbose("rm %s", SHORTLINKNAME);
(void)unlink(SHORTLINKNAME); (void)unlink(SHORTLINKNAME);
verbose("rm %s", HARDLINKNAME); verbose("rm %s", HARDLINKNAME);
(void)unlink(HARDLINKNAME); (void)unlink(HARDLINKNAME);
verbose("rm %s", SPARSEFILENAME); verbose("rm %s", SPARSEFILENAME);
(void)unlink(SPARSEFILENAME); (void)unlink(SPARSEFILENAME);
verbose("rm %s", SUBDIRNAME); verbose("rmdir %s", EMPTYDIRNAME);
(void)rmdir(EMPTYDIRNAME);
verbose("rmdir %s", SUBDIRNAME);
(void)rmdir(SUBDIRNAME); (void)rmdir(SUBDIRNAME);
verbose("cd -"); verbose("cd -");
exit(0); exit(0);
} }
if (waitpid(pid, &wstatus, 0) < 0) if (waitpid(pid, &wstatus, 0) < 0)
err(1, "waitpid()"); err(1, "waitpid()");
if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus) != 0) if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus) != 0)
errx(1, "child failed"); errx(1, "child failed");
verbose("rmdir %s", dirname); verbose("rmdir %s", dirname);
(void)rmdir(dirname); (void)rmdir(dirname);
exit(0); exit(0);
} }