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adhocify
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reformat with clangformat - no functional change

This commit is contained in:
Albert S. 2020-11-15 20:37:55 +01:00
parent cf14367aa8
commit 75b7db7d36
1 changed files with 178 additions and 188 deletions
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366
adhocify.c
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@ -13,7 +13,7 @@
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define _GNU_SOURCE
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
@ -36,10 +36,9 @@
#include <ftw.h>
#include <linux/limits.h>
#define BUF_SIZE (sizeof(struct inotify_event) + NAME_MAX + 1) * 1024
#define STREQ(s1,s2) ( strcmp(s1,s2) == 0 )
#define STREQ(s1, s2) (strcmp(s1, s2) == 0)
#define SCRIPT_PLACE_SPECIFIER "{}" //same as EVENTFILE_PLACEHOLDER for backwards compatibility
#define SCRIPT_PLACE_SPECIFIER "{}" // same as EVENTFILE_PLACEHOLDER for backwards compatibility
#define EVENTFILE_PLACEHOLDER "%eventfilepath%"
#define EVENTSTR_PLACEHOLDER "%eventmaskstr%"
@ -54,8 +53,6 @@ struct watchlistentry
struct watchlistentry *watchlist_head = NULL;
struct watchlistentry **watchlist = &watchlist_head;
struct ignorelist
{
char *ignore;
@ -65,13 +62,12 @@ struct ignorelist
struct ignorelist *ignorelist_head = NULL;
struct ignorelist **ignorelist_current = &ignorelist_head;
/* Write-once globals. Set from process_arguments*/
bool silent = false;
bool noenv = false;
bool fromstdin = false;
bool forkbombcheck = true;
bool daemonize = false;
bool daemonize = false;
bool exit_with_child = false;
int awaited_child_exit_code = -1;
bool negate_child_exit_code = false;
@ -79,15 +75,15 @@ bool negate_child_exit_code = false;
uint32_t mask = 0;
char *prog = NULL;
char *path_logfile = NULL;
char **script_arguments = NULL; //options to be passed to script we are calling
char **script_arguments = NULL; // options to be passed to script we are calling
size_t n_script_arguments = 0;
void *xmalloc(size_t size)
{
void *m = malloc(size);
if(m == NULL)
if(m == NULL)
{
perror("malloc");
perror("malloc");
exit(EXIT_FAILURE);
}
return m;
@ -116,12 +112,11 @@ char *xrealpath(const char *path, char *resolved_path)
return tmp;
}
char *ndirname(const char *path)
{
if(path == NULL)
{
return xstrdup(".");
return xstrdup(".");
}
char *c = strdupa(path);
return xstrdup(dirname(c));
@ -130,8 +125,8 @@ char *ndirname(const char *path)
char *find_ifd_path(int ifd)
{
for(struct watchlistentry *lkp = watchlist_head; lkp != NULL; lkp = lkp->next)
{
if(lkp->ifd == ifd)
{
if(lkp->ifd == ifd)
{
return lkp->path;
}
@ -165,20 +160,17 @@ bool path_is_directory(const char *path)
static inline bool file_exists(const char *path)
{
return access(path, F_OK) == 0;
return access(path, F_OK) == 0;
}
void add_to_ignore_list(const char *str)
{
*ignorelist_current = xmalloc(sizeof(struct ignorelist));
(*ignorelist_current)->ignore = xstrdup(str);
ignorelist_current = &(*ignorelist_current)->next;
ignorelist_current = &(*ignorelist_current)->next;
}
void logwrite(const char *format, ...)
{
if(silent)
@ -196,14 +188,13 @@ void logerror(const char *format, ...)
{
va_list args;
va_start(args, format);
char *prefix = "Error: ";
char *prefix = "Error: ";
char *tmp = alloca(strlen(format) + strlen(prefix) + 1);
strcpy(tmp, prefix);
strcat(tmp, format);
vfprintf(stderr, tmp, args);
fflush(stderr);
va_end(args);
}
void watchqueue_add_path(const char *pathname)
@ -215,24 +206,22 @@ void watchqueue_add_path(const char *pathname)
e->path = path;
e->isdir = path_is_directory(pathname);
e->next = NULL;
watchlist= &e->next;
watchlist = &e->next;
}
void create_watches(int fd, uint32_t mask)
{
for(struct watchlistentry *lkp = watchlist_head; lkp != NULL; lkp = lkp->next)
{
int ret = inotify_add_watch(fd, lkp->path, mask);
if(ret == -1)
if(ret == -1)
{
perror("inotify_add_watch");
exit(EXIT_FAILURE);
perror("inotify_add_watch");
exit(EXIT_FAILURE);
}
lkp->ifd = ret;
}
}
}
bool redirect_stdout(const char *outfile)
@ -259,7 +248,7 @@ const char *mask_to_names(int mask)
size_t n = sizeof(ret) - 1;
if(mask & IN_ATTRIB)
{
strncat(ret, "IN_ATTRIB,",n);
strncat(ret, "IN_ATTRIB,", n);
}
if(mask & IN_OPEN)
{
@ -322,26 +311,26 @@ const char *mask_to_names(int mask)
return ret;
}
bool run_prog(const char *eventfile, uint32_t eventmask)
bool run_prog(const char *eventfile, uint32_t eventmask)
{
pid_t pid = fork();
if(pid == 0)
{
if(path_logfile)
{
if(! redirect_stdout(path_logfile))
if(!redirect_stdout(path_logfile))
{
return false;
return false;
}
}
if(! noenv)
if(!noenv)
{
char envvar[30];
snprintf(envvar, sizeof(envvar), "ADHOCIFYEVENT=%"PRIu32, eventmask);
snprintf(envvar, sizeof(envvar), "ADHOCIFYEVENT=%" PRIu32, eventmask);
putenv(envvar);
}
for(unsigned int i = 0; i < n_script_arguments; i++)
{
char *argument = script_arguments[i];
@ -357,7 +346,7 @@ bool run_prog(const char *eventfile, uint32_t eventmask)
}
}
}
execvp(prog, script_arguments);
logerror("Exec of %s failed: %s\n", prog, strerror(errno));
int exitcode = (errno == ENOENT) ? 127 : EXIT_FAILURE;
@ -367,14 +356,13 @@ bool run_prog(const char *eventfile, uint32_t eventmask)
{
perror("fork");
return false;
}
}
return true;
}
uint32_t name_to_mask(const char *name)
{
{
if(STREQ(name, "IN_CLOSE_WRITE"))
return IN_CLOSE_WRITE;
else if(STREQ(name, "IN_OPEN"))
@ -410,7 +398,7 @@ uint32_t name_to_mask(const char *name)
void check_forkbomb(const char *path_logfile, const char *path_prog)
{
char *dir_log = ndirname(path_logfile);
char *dir_prog = ndirname(path_prog);
char *dir_prog = ndirname(path_prog);
struct watchlistentry *lkp = watchlist_head;
while(lkp)
@ -418,9 +406,10 @@ void check_forkbomb(const char *path_logfile, const char *path_prog)
if(lkp->isdir)
{
char *dir_lkpPath = lkp->path;
if( STREQ(dir_lkpPath, dir_log) || STREQ(dir_lkpPath, dir_prog) )
if(STREQ(dir_lkpPath, dir_log) || STREQ(dir_lkpPath, dir_prog))
{
logerror("Don't place your logfiles or command in a directory you are watching for events. Pass -b to bypass this check.\n");
logerror("Don't place your logfiles or command in a directory you are watching for events. Pass -b to "
"bypass this check.\n");
exit(EXIT_FAILURE);
}
}
@ -435,12 +424,12 @@ void check_forkbomb(const char *path_logfile, const char *path_prog)
void queue_watches_from_stdin()
{
char *line = NULL;
size_t n = 0;
size_t n = 0;
ssize_t r;
while((r = getline(&line, &n, stdin)) != -1)
{
if(line[r-1] == '\n')
line[r-1] = 0;
if(line[r - 1] == '\n')
line[r - 1] = 0;
watchqueue_add_path(line);
}
}
@ -452,9 +441,9 @@ char *get_eventfile_abspath(struct inotify_event *event)
{
return NULL;
}
char *result = NULL;
if((event->len) > 0 )
if((event->len) > 0)
{
if(asprintf(&result, "%s/%s", wdpath, event->name) == -1)
{
@ -468,171 +457,174 @@ char *get_eventfile_abspath(struct inotify_event *event)
return result;
}
void handle_event(struct inotify_event *event)
{
if(event->mask & mask)
{
if(event->mask & mask)
{
char *eventfile_abspath = get_eventfile_abspath(event);
if(eventfile_abspath == NULL)
{
logerror("Could not get absolute path for event. Watch descriptor %i\n", event->wd);
exit(EXIT_FAILURE);
}
if(is_ignored(eventfile_abspath))
if(is_ignored(eventfile_abspath))
{
free(eventfile_abspath);
return;
}
logwrite("Starting execution of command %s\n", prog);
bool r = run_prog(eventfile_abspath, event->mask);
if(!r)
if(!r)
{
logerror("Execution of command %s failed\n", prog);
exit(EXIT_FAILURE);
}
fflush(stdout);
fflush(stderr);
free (eventfile_abspath);
free(eventfile_abspath);
}
}
static inline char *get_cwd()
{
return getcwd(NULL,0);
return getcwd(NULL, 0);
}
void print_usage()
{
printf("adhocify [OPTIONS] command [arguments for command] - Monitor for inotify events and launch commands\n\n");
printf("--daemon, -d run as a daemon\n");
printf("--daemon, -d run as a daemon\n");
printf("--path, -w adds the specified path to the watchlist\n");
printf("--logfile, -o path to write output of adhocify and stdout/stderr of launched commands to\n");
printf("--mask, -m inotify event to watch for (see inotify(7)). Can be specified multiple times to watch for several events\n");
printf("--no-env, -a if specified, the inotify event which occured won't be passed to the command as an environment variable\n");
printf("--mask, -m inotify event to watch for (see inotify(7)). Can be specified multiple times to "
"watch for several events\n");
printf("--no-env, -a if specified, the inotify event which occured won't be passed to the command as an "
"environment variable\n");
printf("--silent, -q surpress any output created by adhocify itself\n");
printf("--stdin, -s Read the paths which must be added to the watchlist from stdin. Each path must be in a seperate line\n");
printf("--stdin, -s Read the paths which must be added to the watchlist from stdin. Each path must be "
"in a seperate line\n");
printf("--no-forkbomb-check, -b Disable fork bomb detection\n");
printf("--ignore, -i Shell wildcard pattern (see glob(7)) to ignore events on files for which the pattern matches\n");
printf("--exit-with-child, -e Exit when the commands exits. You can also specify a return code (e. g. -e=1 to exit only on errors)\n"); printf("\nIf your command should know the file the event occured on, use the {} placeholder when you specify the arguments (like xargs)\n");
printf("--ignore, -i Shell wildcard pattern (see glob(7)) to ignore events on files for which the "
"pattern matches\n");
printf("--exit-with-child, -e Exit when the commands exits. You can also specify a return code (e. g. -e=1 to "
"exit only on errors)\n");
printf("\nIf your command should know the file the event occured on, use the {} placeholder when you specify the "
"arguments (like xargs)\n");
}
static struct option long_options[] =
{
{ "daemon", no_argument, 0, 'd' },
{ "logfile", required_argument, 0, 'o' },
{ "mask", required_argument, 0, 'm' },
{ "path", required_argument, 0, 'w' },
{ "no-env", no_argument, 0, 'a' },
{ "stdin", no_argument, 0, 's' },
{ "no-forkbomb-check", no_argument, 0, 'b' },
{ "ignore", required_argument, 0, 'i' },
{ "silent", no_argument, 0, 'q' },
{ "help", no_argument, 0, 'h' },
{ "exit-with-child", optional_argument, 0, 'e' }
};
static struct option long_options[] = {{"daemon", no_argument, 0, 'd'},
{"logfile", required_argument, 0, 'o'},
{"mask", required_argument, 0, 'm'},
{"path", required_argument, 0, 'w'},
{"no-env", no_argument, 0, 'a'},
{"stdin", no_argument, 0, 's'},
{"no-forkbomb-check", no_argument, 0, 'b'},
{"ignore", required_argument, 0, 'i'},
{"silent", no_argument, 0, 'q'},
{"help", no_argument, 0, 'h'},
{"exit-with-child", optional_argument, 0, 'e'}};
//fills global n_script_arguments and script_arguments var
// fills global n_script_arguments and script_arguments var
void fill_script_arguments(size_t n_args, char *args[])
{
n_script_arguments = n_args + 2; //2 = argv0 and terminating NULL
char **arguments = xmalloc( n_script_arguments * sizeof(char *) );
const char *argv0 = memrchr(prog, '/', strlen(prog));
argv0 = ( argv0 == NULL ) ? prog : argv0+1;
arguments[0] = argv0;
const int begin_offset = 1;
for(unsigned int i = 0; i < n_args; i++)
{
char *argument = args[i];
arguments[i+begin_offset] = strdup(argument);
}
arguments[n_args+begin_offset] = NULL;
script_arguments = arguments;
}
n_script_arguments = n_args + 2; // 2 = argv0 and terminating NULL
char **arguments = xmalloc(n_script_arguments * sizeof(char *));
const char *argv0 = memrchr(prog, '/', strlen(prog));
argv0 = (argv0 == NULL) ? prog : argv0 + 1;
arguments[0] = argv0;
const int begin_offset = 1;
for(unsigned int i = 0; i < n_args; i++)
{
char *argument = args[i];
arguments[i + begin_offset] = strdup(argument);
}
arguments[n_args + begin_offset] = NULL;
script_arguments = arguments;
}
void parse_options(int argc, char **argv)
{
char *watchpath = NULL;
int option;
int option_index;
uint32_t optmask = 0;
int option_index;
uint32_t optmask = 0;
while((option = getopt_long(argc, argv, "absdo:w:m:l:i:e::", long_options, &option_index)) != -1)
{
switch(option)
{
case 'd':
daemonize = true;
break;
case 'o':
path_logfile = optarg;
break;
case 'm':
optmask = name_to_mask(optarg);
if(optmask == 0) {
logerror("Not supported inotify event: %s\n", optarg);
exit(EXIT_FAILURE);
}
mask |= optmask;
break;
case 'w':
watchpath = optarg;
watchqueue_add_path(watchpath);
break;
case 'a':
noenv=true;
break;
case 's':
fromstdin=true;
break;
case 'b':
forkbombcheck=false;
break;
case 'i':
add_to_ignore_list(optarg);
break;
case 'q':
silent=true;
break;
case 'h':
print_usage();
exit(EXIT_SUCCESS);
case 'e':
exit_with_child = true;
if(optarg)
case 'd':
daemonize = true;
break;
case 'o':
path_logfile = optarg;
break;
case 'm':
optmask = name_to_mask(optarg);
if(optmask == 0)
{
logerror("Not supported inotify event: %s\n", optarg);
exit(EXIT_FAILURE);
}
mask |= optmask;
break;
case 'w':
watchpath = optarg;
watchqueue_add_path(watchpath);
break;
case 'a':
noenv = true;
break;
case 's':
fromstdin = true;
break;
case 'b':
forkbombcheck = false;
break;
case 'i':
add_to_ignore_list(optarg);
break;
case 'q':
silent = true;
break;
case 'h':
print_usage();
exit(EXIT_SUCCESS);
case 'e':
exit_with_child = true;
if(optarg)
{
if(*optarg == '!')
{
if(*optarg == '!')
{
negate_child_exit_code = true;
++optarg;
}
if(*optarg == '\0')
{
logerror("Please specify the exit code\n");
exit(EXIT_FAILURE);
}
awaited_child_exit_code = atoi(optarg);
negate_child_exit_code = true;
++optarg;
}
break;
}
if(*optarg == '\0')
{
logerror("Please specify the exit code\n");
exit(EXIT_FAILURE);
}
awaited_child_exit_code = atoi(optarg);
}
break;
}
}
if(optind == argc)
{
if(optind == argc)
{
print_usage();
logerror("missing command path\n");
exit(EXIT_FAILURE);
exit(EXIT_FAILURE);
}
prog = argv[optind++];
if(optind <= argc)
{
fill_script_arguments(argc - optind, &argv[optind]);
@ -654,8 +646,8 @@ void process_options()
if(mask == 0)
{
mask |= IN_CLOSE_WRITE;
}
}
if(path_logfile)
{
path_logfile = xrealpath(path_logfile, NULL);
@ -673,7 +665,7 @@ void process_options()
if(daemonize)
{
if(daemon(0,0) == -1)
if(daemon(0, 0) == -1)
{
perror("daemon");
exit(EXIT_FAILURE);
@ -683,27 +675,27 @@ void process_options()
void start_monitoring(int ifd)
{
while(1)
while(1)
{
int len;
int offset =0;
char buf[BUF_SIZE];
len = read(ifd, buf, BUF_SIZE);
if(len == -1)
{
if(errno == EINTR)
continue;
perror("read");
exit(EXIT_FAILURE);
}
int len;
int offset = 0;
char buf[BUF_SIZE];
len = read(ifd, buf, BUF_SIZE);
if(len == -1)
{
if(errno == EINTR)
continue;
perror("read");
exit(EXIT_FAILURE);
}
while(offset < len)
{
while(offset < len)
{
struct inotify_event *event = (struct inotify_event *)&buf[offset];
handle_event(event);
offset+=sizeof(struct inotify_event) + event->len;
}
struct inotify_event *event = (struct inotify_event *)&buf[offset];
handle_event(event);
offset += sizeof(struct inotify_event) + event->len;
}
}
}
@ -712,8 +704,8 @@ void child_handler(int signum, siginfo_t *info, void *context)
if(signum != SIGCHLD)
{
return;
}
}
int status;
pid_t p = waitpid(-1, &status, WNOHANG);
if(p == -1)
@ -747,7 +739,7 @@ void child_handler(int signum, siginfo_t *info, void *context)
}
if(exit_with_child && WIFSIGNALED(status))
{
adhocify_exit_code = 128 + WTERMSIG(status); //copy bash's behaviour
adhocify_exit_code = 128 + WTERMSIG(status); // copy bash's behaviour
exit(adhocify_exit_code);
}
}
@ -764,22 +756,20 @@ void set_signals()
}
}
int main(int argc, char **argv)
{
if(argc < 2)
{
if(argc < 2)
{
print_usage();
exit(EXIT_FAILURE);
}
//signal(SIGCHLD, SIG_IGN);
// signal(SIGCHLD, SIG_IGN);
set_signals();
parse_options(argc, argv);
process_options();
int ifd = inotify_init();
if(ifd == -1)
{