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Add support to redirection

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This commit is contained in:
Solene Rapenne 2021-01-01 21:00:40 +01:00
commit f0f05b83aa
4 changed files with 50 additions and 9 deletions
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48
main.c
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@ -21,7 +21,8 @@
void display_file(const char *, const char *);
void status (const int, const char *, const char *);
void status(const int, const char *, const char *);
void status_redirect(const int code, const char *url);
void drop_privileges(const char *, const char *);
void eunveil(const char *path, const char *permissions);
size_t estrlcat(char *dst, const char *src, size_t dstsize);
@ -127,6 +128,13 @@ status(const int code, const char *file_mime, const char *lang)
code, file_mime, lang);
}
void
status_redirect(const int code, const char *url)
{
printf("%i %s\r\n",
code, url);
}
void
display_file(const char *path, const char *lang)
{
@ -135,19 +143,28 @@ display_file(const char *path, const char *lang)
ssize_t nread = 0;
char *buffer[BUFSIZ];
const char *file_mime;
char target[FILENAME_MAX] = "";
/* this is to check if path is a directory */
if (stat(path, &sb) == -1)
/* this is to check if path exists and obtain metadata later */
if (stat(path, &sb) == -1) {
/* check if path is a symbolic link
* if so, redirect using its target */
if (lstat(path, &sb) != -1 && S_ISLNK(sb.st_mode) == 1)
goto redirect;
else
goto err;
}
/* check if directory */
if (S_ISDIR(sb.st_mode) == 1)
goto err;
/* open the file requested */
if ((fd = fopen(path, "r")) == NULL)
goto err;
/* check if directory */
if (S_ISDIR(sb.st_mode) == 1)
goto err;
file_mime = get_file_mime(path);
status(20, file_mime, lang);
@ -165,8 +182,23 @@ err:
syslog(LOG_DAEMON, "path invalid %s", path);
goto closefd;
redirect:
/* read symbolic link target to redirect */
if (readlink(path, target, FILENAME_MAX) == -1) {
int errnum = errno;
fprintf(stderr, "Value of errno: %d\n", errno);
perror("Error printed by perror");
fprintf(stderr, "Error opening file: %s\n", strerror( errnum ));
goto err;
}
status_redirect(39, target);
syslog(LOG_DAEMON, "redirection from %s to %s", path, target);
closefd:
fclose(fd);
if (S_ISREG(sb.st_mode) == 1) {
fclose(fd);
}
}
int