StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
15826233
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
1
CommunityOwnedDate
CreationDate
2013-04-05T05:00:42.130
FavoriteCount
0
LastActivityDate
2013-04-05T05:00:42.130
LastEditDate
LastEditorUserId
0
OwnerUserId
15168
ParentId
15825112
PostTypeId
2
Score
2
ViewCount
0
LastEditorDisplayName
text
Body
You need to check the return status of your system calls, and specifically <code>stat()</code>. What's happening is that you read a name found in the <code>..</code> directory, but when you invoke <code>stat()</code>, you are doing so on <code>./name</code> and not <code>../name</code>. This code should demonstrate the point: <pre><code>#include <dirent.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/stat.h> #include <unistd.h> #include <errno.h> void print_dir(char *dir_n, char *file) { DIR *dir = opendir(dir_n); if (dir == 0) { int errnum = errno; fprintf(stderr, "error: opendir(\"%s\") failed (%d: %s)\n", dir_n, errnum, strerror(errnum)); exit(1); } struct dirent *Dirent; while ((Dirent = readdir(dir)) != 0) { struct stat stats; if (stat(Dirent->d_name, &stats) < 0) { int errnum = errno; fprintf(stderr, "error: failed to stat(\"%s\") (%d: %s)\n", Dirent->d_name, errnum, strerror(errnum)); } else if (S_ISDIR(stats.st_mode)) { if (strcmp(file, Dirent->d_name) == 0) { printf("found directory %s (inode = %ld)\n", Dirent->d_name, (long)stats.st_ino); break; } else printf("found directory %s - not a match for %s\n", Dirent->d_name, file); } else { printf("%s is not a directory\n", Dirent->d_name); } } closedir(dir); } int main(void) { print_dir("..", "dirtest"); return 0; } </code></pre> And this trivial variant should find the directory <code>../dirtest</code> if it exists: <pre><code>#include <dirent.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/stat.h> #include <unistd.h> #include <errno.h> void print_dir(char *dir_n, char *file) { DIR *dir = opendir(dir_n); if (dir == 0) { int errnum = errno; fprintf(stderr, "error: opendir(\"%s\") failed (%d: %s)\n", dir_n, errnum, strerror(errnum)); exit(1); } struct dirent *Dirent; while ((Dirent = readdir(dir)) != 0) { char fullname[1024]; snprintf(fullname, sizeof(fullname), "%s/%s", dir_n, Dirent->d_name); struct stat stats; if (stat(fullname, &stats) < 0) { int errnum = errno; fprintf(stderr, "error: failed to stat(\"%s\") (%d: %s)\n", fullname, errnum, strerror(errnum)); } else if (S_ISDIR(stats.st_mode)) { if (strcmp(file, Dirent->d_name) == 0) { printf("found directory %s (%s) (inode = %ld)\n", Dirent->d_name, fullname, (long)stats.st_ino); break; } else printf("found directory %s - not a match for %s\n", fullname, file); } else { printf("%s is not a directory\n", fullname); } } closedir(dir); } int main(void) { print_dir("..", "dirtest"); return 0; } </code></pre>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POFinding directory in another directory
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USJonathan Leffler
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. POFinding directory in another directory
 singulars
 PostTypePostTypeId
 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
2. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTAcceptedByOriginator
3. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. COThank you for explanation
 singulars
 PostPostId
 PO
 UserUserId
 USswiftk

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.