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fbaf1171b4
An embarrassing thinko in cgit_check_cache() would truncate valid cachefiles
in the following situation:
1) process A notices a missing/expired cachefile
2) process B gets scheduled, locks, fills and unlocks the cachefile
3) process A gets scheduled, locks the cachefile, notices that the cachefile
now exist/is not expired anymore, and continues to overwrite it with an
empty lockfile.
Thanks to Linus for noticing (again).
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
#ifndef CGIT_H
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#define CGIT_H
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#include "git.h"
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#include <openssl/sha.h>
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#include <ctype.h>
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#include <sched.h>
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typedef void (*configfn)(const char *name, const char *value);
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struct cacheitem {
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char *name;
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struct stat st;
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int ttl;
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int fd;
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};
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extern const char cgit_version[];
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extern char *cgit_root;
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extern char *cgit_root_title;
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extern char *cgit_css;
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extern char *cgit_logo;
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extern char *cgit_logo_link;
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extern char *cgit_virtual_root;
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extern char *cgit_cache_root;
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extern int cgit_max_lock_attempts;
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extern int cgit_cache_root_ttl;
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extern int cgit_cache_repo_ttl;
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extern int cgit_cache_dynamic_ttl;
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extern int cgit_cache_static_ttl;
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extern int cgit_cache_max_create_time;
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extern char *cgit_repo_name;
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extern char *cgit_repo_desc;
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extern char *cgit_repo_owner;
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extern int cgit_query_has_symref;
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extern int cgit_query_has_sha1;
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extern char *cgit_querystring;
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extern char *cgit_query_repo;
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extern char *cgit_query_page;
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extern char *cgit_query_head;
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extern char *cgit_query_sha1;
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extern int htmlfd;
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extern void cgit_global_config_cb(const char *name, const char *value);
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extern void cgit_repo_config_cb(const char *name, const char *value);
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extern void cgit_querystring_cb(const char *name, const char *value);
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extern char *fmt(const char *format,...);
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extern void html(const char *txt);
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extern void htmlf(const char *format,...);
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extern void html_txt(char *txt);
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extern void html_attr(char *txt);
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extern void html_link_open(char *url, char *title, char *class);
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extern void html_link_close(void);
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extern int cgit_read_config(const char *filename, configfn fn);
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extern int cgit_parse_query(char *txt, configfn fn);
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extern void cache_prepare(struct cacheitem *item);
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extern int cache_lock(struct cacheitem *item);
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extern int cache_unlock(struct cacheitem *item);
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extern int cache_cancel_lock(struct cacheitem *item);
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extern int cache_exist(struct cacheitem *item);
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extern int cache_expired(struct cacheitem *item);
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extern char *cgit_repourl(const char *reponame);
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extern char *cgit_pageurl(const char *reponame, const char *pagename,
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const char *query);
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extern void cgit_print_error(char *msg);
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extern void cgit_print_docstart(char *title, struct cacheitem *item);
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extern void cgit_print_docend();
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extern void cgit_print_pageheader(char *title);
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extern void cgit_print_repolist(struct cacheitem *item);
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extern void cgit_print_summary();
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extern void cgit_print_log(const char *tip, int ofs, int cnt);
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extern void cgit_print_view(char *hex);
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#endif /* CGIT_H */
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