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authorClemens Buchacher <drizzd@aon.at>2012-04-13 01:11:36 +0200
committerJunio C Hamano <gitster@pobox.com>2012-04-15 13:28:02 -0700
commit2565b43bd2634ffd6bda06236d664288aeb8eb6a (patch)
treec7f09bea843450064e21caa3ff5906c20af12629 /setup.c
parente8dde3e5f9ddb7cf95a6ff3cea6cf07c3a2db80d (diff)
downloadgit-2565b43bd2634ffd6bda06236d664288aeb8eb6a.tar.gz
properly keep track of current working directory
Various failure modes in the repository detection code path currently quote the wrong directory in their error message. The working directory is changed iteratively to the parent directory until a git repository is found. If the working directory cannot be changed to the parent directory for some reason, the detection gives up and prints an error message. The error message should report the current working directory. Instead of continually updating the 'cwd' variable, which is actually used to remember the original working directory, the 'offset' variable is used to keep track of the current working directory. At the point where the affected error handling code is called, 'offset' already points to the end of the parent of the working directory, rather than the current working directory. Fix this by explicitly using a variable 'offset_parent' and update 'offset' concurrently with the call to chdir. In a similar fashion, the function get_device_or_die() would print the original working directory in case of a failure, rather than the current working directory. Fix this as well by making use of the 'offset' variable. Lastly, replace the phrase 'mount parent' with 'mount point'. The former appears to be a typo. Signed-off-by: Clemens Buchacher <drizzd@aon.at> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'setup.c')
-rw-r--r--setup.c22
1 files changed, 13 insertions, 9 deletions
diff --git a/setup.c b/setup.c
index 7a3618fab7..731851a4a8 100644
--- a/setup.c
+++ b/setup.c
@@ -569,13 +569,15 @@ static const char *setup_nongit(const char *cwd, int *nongit_ok)
return NULL;
}
-static dev_t get_device_or_die(const char *path, const char *prefix)
+static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len)
{
struct stat buf;
- if (stat(path, &buf))
- die_errno("failed to stat '%s%s%s'",
+ if (stat(path, &buf)) {
+ die_errno("failed to stat '%*s%s%s'",
+ prefix_len,
prefix ? prefix : "",
prefix ? "/" : "", path);
+ }
return buf.st_dev;
}
@@ -589,7 +591,7 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
static char cwd[PATH_MAX+1];
const char *gitdirenv, *ret;
char *gitfile;
- int len, offset, ceil_offset;
+ int len, offset, offset_parent, ceil_offset;
dev_t current_device = 0;
int one_filesystem = 1;
@@ -631,7 +633,7 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
*/
one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
if (one_filesystem)
- current_device = get_device_or_die(".", NULL);
+ current_device = get_device_or_die(".", NULL, 0);
for (;;) {
gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
if (gitfile)
@@ -653,11 +655,12 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
if (is_git_directory("."))
return setup_bare_git_dir(cwd, offset, len, nongit_ok);
- while (--offset > ceil_offset && cwd[offset] != '/');
- if (offset <= ceil_offset)
+ offset_parent = offset;
+ while (--offset_parent > ceil_offset && cwd[offset_parent] != '/');
+ if (offset_parent <= ceil_offset)
return setup_nongit(cwd, nongit_ok);
if (one_filesystem) {
- dev_t parent_device = get_device_or_die("..", cwd);
+ dev_t parent_device = get_device_or_die("..", cwd, offset);
if (parent_device != current_device) {
if (nongit_ok) {
if (chdir(cwd))
@@ -666,7 +669,7 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
return NULL;
}
cwd[offset] = '\0';
- die("Not a git repository (or any parent up to mount parent %s)\n"
+ die("Not a git repository (or any parent up to mount point %s)\n"
"Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
}
}
@@ -674,6 +677,7 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
cwd[offset] = '\0';
die_errno("Cannot change to '%s/..'", cwd);
}
+ offset = offset_parent;
}
}