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-rw-r--r--builtin/gc.c12
-rw-r--r--builtin/receive-pack.c4
-rw-r--r--daemon.c4
-rw-r--r--fetch-pack.c4
-rw-r--r--git-compat-util.h6
-rw-r--r--ident.c4
-rw-r--r--wrapper.c13
7 files changed, 33 insertions, 14 deletions
diff --git a/builtin/gc.c b/builtin/gc.c
index 2daede7..91f7696 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -232,7 +232,7 @@ static int need_to_gc(void)
static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
{
static struct lock_file lock;
- char my_host[128];
+ char my_host[HOST_NAME_MAX + 1];
struct strbuf sb = STRBUF_INIT;
struct stat st;
uintmax_t pid;
@@ -244,15 +244,19 @@ static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
/* already locked */
return NULL;
- if (gethostname(my_host, sizeof(my_host)))
+ if (xgethostname(my_host, sizeof(my_host)))
xsnprintf(my_host, sizeof(my_host), "unknown");
pidfile_path = git_pathdup("gc.pid");
fd = hold_lock_file_for_update(&lock, pidfile_path,
LOCK_DIE_ON_ERROR);
if (!force) {
- static char locking_host[128];
+ static char locking_host[HOST_NAME_MAX + 1];
+ static char *scan_fmt;
int should_exit;
+
+ if (!scan_fmt)
+ scan_fmt = xstrfmt("%s %%%dc", "%"SCNuMAX, HOST_NAME_MAX);
fp = fopen(pidfile_path, "r");
memset(locking_host, 0, sizeof(locking_host));
should_exit =
@@ -268,7 +272,7 @@ static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
* running.
*/
time(NULL) - st.st_mtime <= 12 * 3600 &&
- fscanf(fp, "%"SCNuMAX" %127c", &pid, locking_host) == 2 &&
+ fscanf(fp, scan_fmt, &pid, locking_host) == 2 &&
/* be gentle to concurrent "gc" on remote hosts */
(strcmp(locking_host, my_host) || !kill(pid, 0) || errno == EPERM);
if (fp != NULL)
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 7f484e7..f96834f 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -1697,12 +1697,12 @@ static const char *unpack(int err_fd, struct shallow_info *si)
if (status)
return "unpack-objects abnormal exit";
} else {
- char hostname[256];
+ char hostname[HOST_NAME_MAX + 1];
argv_array_pushl(&child.args, "index-pack", "--stdin", NULL);
push_header_arg(&child.args, &hdr);
- if (gethostname(hostname, sizeof(hostname)))
+ if (xgethostname(hostname, sizeof(hostname)))
xsnprintf(hostname, sizeof(hostname), "localhost");
argv_array_pushf(&child.args,
"--keep=receive-pack %"PRIuMAX" on %s",
diff --git a/daemon.c b/daemon.c
index f70d27b..ac7181a 100644
--- a/daemon.c
+++ b/daemon.c
@@ -4,10 +4,6 @@
#include "strbuf.h"
#include "string-list.h"
-#ifndef HOST_NAME_MAX
-#define HOST_NAME_MAX 256
-#endif
-
#ifdef NO_INITGROUPS
#define initgroups(x, y) (0) /* nothing */
#endif
diff --git a/fetch-pack.c b/fetch-pack.c
index c5e6867..afb8b05 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -804,8 +804,8 @@ static int get_pack(struct fetch_pack_args *args,
if (args->use_thin_pack)
argv_array_push(&cmd.args, "--fix-thin");
if (args->lock_pack || unpack_limit) {
- char hostname[256];
- if (gethostname(hostname, sizeof(hostname)))
+ char hostname[HOST_NAME_MAX + 1];
+ if (xgethostname(hostname, sizeof(hostname)))
xsnprintf(hostname, sizeof(hostname), "localhost");
argv_array_pushf(&cmd.args,
"--keep=fetch-pack %"PRIuMAX " on %s",
diff --git a/git-compat-util.h b/git-compat-util.h
index 8a4a3f8..bd04564 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -884,6 +884,12 @@ static inline size_t xsize_t(off_t len)
__attribute__((format (printf, 3, 4)))
extern int xsnprintf(char *dst, size_t max, const char *fmt, ...);
+#ifndef HOST_NAME_MAX
+#define HOST_NAME_MAX 256
+#endif
+
+extern int xgethostname(char *buf, size_t len);
+
/* in ctype.c, for kwset users */
extern const unsigned char tolower_trans_tbl[256];
diff --git a/ident.c b/ident.c
index c0364fe..bea871c 100644
--- a/ident.c
+++ b/ident.c
@@ -120,9 +120,9 @@ static int canonical_name(const char *host, struct strbuf *out)
static void add_domainname(struct strbuf *out, int *is_bogus)
{
- char buf[1024];
+ char buf[HOST_NAME_MAX + 1];
- if (gethostname(buf, sizeof(buf))) {
+ if (xgethostname(buf, sizeof(buf))) {
warning_errno("cannot get host name");
strbuf_addstr(out, "(none)");
*is_bogus = 1;
diff --git a/wrapper.c b/wrapper.c
index 0542fc7..d837417 100644
--- a/wrapper.c
+++ b/wrapper.c
@@ -655,3 +655,16 @@ void sleep_millisec(int millisec)
{
poll(NULL, 0, millisec);
}
+
+int xgethostname(char *buf, size_t len)
+{
+ /*
+ * If the full hostname doesn't fit in buf, POSIX does not
+ * specify whether the buffer will be null-terminated, so to
+ * be safe, do it ourselves.
+ */
+ int ret = gethostname(buf, len);
+ if (!ret)
+ buf[len - 1] = 0;
+ return ret;
+}