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tailhead: convert to generic object payload

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This commit is contained in:
Phil Sutter 2009-10-04 14:41:51 +02:00
parent 1d73d82b87
commit f6942c8c98
4 changed files with 77 additions and 49 deletions
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5
src/core.c
View File

@ -1439,10 +1439,7 @@ void free_text_objects(struct text_object *root, int internal)
break;
case OBJ_head:
case OBJ_tail:
free(data.headtail.logfile);
if(data.headtail.buffer) {
free(data.headtail.buffer);
}
free_tailhead(obj);
break;
case OBJ_text:
case OBJ_font:

103
src/tailhead.c
View File

@ -37,7 +37,16 @@
#define MAX_HEADTAIL_LINES 30
#define DEFAULT_MAX_HEADTAIL_USES 2
void tailstring(char *string, int endofstring, int wantedlines) {
struct headtail {
int wantedlines;
char *logfile;
char *buffer;
int current_use;
int max_uses;
int reported;
};
static void tailstring(char *string, int endofstring, int wantedlines) {
int i, linescounted = 0;
string[endofstring] = 0;
@ -56,53 +65,77 @@ void tailstring(char *string, int endofstring, int wantedlines) {
}
}
void free_tailhead(struct text_object *obj)
{
struct headtail *ht = obj->data.opaque;
if (!ht)
return;
if (ht->logfile)
free(ht->logfile);
if (ht->buffer)
free(ht->buffer);
free(obj->data.opaque);
obj->data.opaque = NULL;
}
void init_tailhead(const char* type, const char* arg, struct text_object *obj, void* free_at_crash) {
unsigned int args;
struct headtail *ht;
obj->data.headtail.logfile=malloc(DEFAULT_TEXT_BUFFER_SIZE);
obj->data.headtail.max_uses = DEFAULT_MAX_HEADTAIL_USES;
args = sscanf(arg, "%s %d %d", obj->data.headtail.logfile, &obj->data.headtail.wantedlines, &obj->data.headtail.max_uses);
if(args == 2 || args == 3) {
if(obj->data.headtail.max_uses < 1) {
free(obj->data.headtail.logfile);
CRIT_ERR(obj, free_at_crash, "invalid arg for %s, next_check must be larger than 0", type);
}
if (obj->data.headtail.wantedlines > 0 && obj->data.headtail.wantedlines <= MAX_HEADTAIL_LINES) {
to_real_path(obj->data.headtail.logfile, obj->data.headtail.logfile);
obj->data.headtail.buffer = NULL;
obj->data.headtail.current_use = 0;
}else{
free(obj->data.headtail.logfile);
CRIT_ERR(obj, free_at_crash, "invalid arg for %s, number of lines must be between 1 and %d", type, MAX_HEADTAIL_LINES);
}
} else {
free(obj->data.headtail.logfile);
ht = malloc(sizeof(struct headtail));
memset(ht, 0, sizeof(struct headtail));
ht->logfile = malloc(DEFAULT_TEXT_BUFFER_SIZE);
memset(ht->logfile, 0, DEFAULT_TEXT_BUFFER_SIZE);
ht->max_uses = DEFAULT_MAX_HEADTAIL_USES;
args = sscanf(arg, "%s %d %d", ht->logfile, &ht->wantedlines, &ht->max_uses);
if (args < 2 || args > 3) {
free_tailhead(obj);
CRIT_ERR(obj, free_at_crash, "%s needs a file as 1st and a number of lines as 2nd argument", type);
}
if (ht->max_uses < 1) {
free_tailhead(obj);
CRIT_ERR(obj, free_at_crash, "invalid arg for %s, next_check must be larger than 0", type);
}
if (ht->wantedlines > 0 && ht->wantedlines <= MAX_HEADTAIL_LINES) {
to_real_path(ht->logfile, ht->logfile);
ht->buffer = NULL;
ht->current_use = 0;
} else {
free_tailhead(obj);
CRIT_ERR(obj, free_at_crash, "invalid arg for %s, number of lines must be between 1 and %d", type, MAX_HEADTAIL_LINES);
}
obj->data.opaque = ht;
}
void print_tailhead(const char* type, struct text_object *obj, char *p, int p_max_size) {
int fd, i, endofstring = 0, linescounted = 0;
FILE *fp;
struct stat st;
struct headtail *ht = obj->data.opaque;
if (!ht)
return;
//empty the buffer and reset the counter if we used it the max number of times
if(obj->data.headtail.buffer && obj->data.headtail.current_use >= obj->data.headtail.max_uses - 1) {
free(obj->data.headtail.buffer);
obj->data.headtail.buffer = NULL;
obj->data.headtail.current_use = 0;
if(ht->buffer && ht->current_use >= ht->max_uses - 1) {
free(ht->buffer);
ht->buffer = NULL;
ht->current_use = 0;
}
//use the buffer if possible
if(obj->data.headtail.buffer) {
strcpy(p, obj->data.headtail.buffer);
obj->data.headtail.current_use++;
if(ht->buffer) {
strcpy(p, ht->buffer);
ht->current_use++;
}else{ //otherwise find the needed data
if(stat(obj->data.headtail.logfile, &st) == 0) {
if(stat(ht->logfile, &st) == 0) {
if (S_ISFIFO(st.st_mode)) {
fd = open_fifo(obj->data.headtail.logfile, &obj->a);
fd = open_fifo(ht->logfile, &ht->reported);
if(fd != -1) {
if(strcmp(type, "head") == 0) {
for(i = 0; linescounted < obj->data.headtail.wantedlines; i++) {
for(i = 0; linescounted < ht->wantedlines; i++) {
read(fd, p + i, 1);
if(p[i] == '\n') {
linescounted++;
@ -111,33 +144,33 @@ void print_tailhead(const char* type, struct text_object *obj, char *p, int p_ma
p[i] = 0;
} else if(strcmp(type, "tail") == 0) {
i = read(fd, p, p_max_size - 1);
tailstring(p, i, obj->data.headtail.wantedlines);
tailstring(p, i, ht->wantedlines);
} else {
CRIT_ERR(NULL, NULL, "If you are seeing this then there is a bug in the code, report it !");
}
}
close(fd);
} else {
fp = open_file(obj->data.headtail.logfile, &obj->a);
fp = open_file(ht->logfile, &ht->reported);
if(fp != NULL) {
if(strcmp(type, "head") == 0) {
for(i = 0; i < obj->data.headtail.wantedlines; i++) {
for(i = 0; i < ht->wantedlines; i++) {
fgets(p + endofstring, p_max_size - endofstring, fp);
endofstring = strlen(p);
}
} else if(strcmp(type, "tail") == 0) {
fseek(fp, - p_max_size, SEEK_END);
i = fread(p, 1, p_max_size - 1, fp);
tailstring(p, i, obj->data.headtail.wantedlines);
tailstring(p, i, ht->wantedlines);
} else {
CRIT_ERR(NULL, NULL, "If you are seeing this then there is a bug in the code, report it !");
}
fclose(fp);
}
}
obj->data.headtail.buffer = strdup(p);
ht->buffer = strdup(p);
} else {
CRIT_ERR(NULL, NULL, "$%s can't find information about %s", type, obj->data.headtail.logfile);
CRIT_ERR(NULL, NULL, "$%s can't find information about %s", type, ht->logfile);
}
}
return;

10
src/tailhead.h
View File

@ -27,5 +27,11 @@
*
*/
void init_tailhead(const char* type, const char* arg, struct text_object *obj, void* free_at_crash);
void print_tailhead(const char* type, struct text_object *obj, char *p, int p_max_size);
#ifndef _TAILHEAD_H
#define _TAILHEAD_H
void free_tailhead(struct text_object *);
void init_tailhead(const char *, const char *, struct text_object *, void *);
void print_tailhead(const char *, struct text_object *, char *, int);
#endif /* _TAILHEAD_H */

8
src/text_object.h
View File

@ -489,14 +489,6 @@ struct text_object {
char *s;
} top;
struct {
int wantedlines;
char *logfile;
char *buffer;
int current_use;
int max_uses;
} headtail;
struct {
double last_update;
float interval;