utils.h

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#include <stdbool.h>
#include <stdio.h>
 
#include <sys/types.h>
 
#define MTRIX_MAX_PATH ((size_t)1024U)
 
#define MTRIX_MAX_UNIX_PATH ((size_t)108U)
 
#define MTRIX_MAX_URL_LEN ((size_t)1024U)
 
#define MTRIX_MAX_ARGS ((size_t)2U)
 
#define BUILD_URL(url, ...) build_url(url, (const char *[]){__VA_ARGS__, NULL})
 
extern const char *PROG_NAME;
 
extern const char *CMD_NAME;
 
FILE *log_set(FILE *f);
 
struct mtrix_buffer {
    char *p;
    size_t n;
};
 
void log_err(const char *fmt, ...);
 
void log_errv(const char *fmt, va_list argp);
 
void log_errno(const char *fmt, ...);
 
static const char *strchrnul(const char *s, int c);
 
static size_t strlcpy(char *restrict dst, const char *restrict src, size_t n);
 
char *is_prefix(const char *prefix, const char *s);
 
bool copy_arg(const char *name, struct mtrix_buffer dst, const char *src);
 
char *join_path(char v[static MTRIX_MAX_PATH], int n, ...);
 
FILE *open_or_create(const char *path, const char *flags);
 
bool read_all(int fd, void *p, size_t n);
 
bool write_all(int fd, const void *p, size_t n);
 
bool exec(const char *const *argv, int fin, int fout, int ferr);
 
bool wait_n(size_t n, const pid_t *p);
 
void join_lines(unsigned char *b, unsigned char *e);
 
size_t mtrix_buffer_append(
    const char *p, size_t size, size_t n, struct mtrix_buffer *b);
 
bool build_url(char *url, const char *const *v);
 
bool request(const char *url, struct mtrix_buffer *b, bool verbose);
 
typedef struct {
    const char *url;
    size_t data_len;
    const char *data;
} post_request;
 
bool post(post_request r, bool verbose, struct mtrix_buffer *b);
 
static inline const char *strchrnul(const char *s, int c) {
    while(*s && *s != c)
        ++s;
    return s;
}
 
static inline size_t strlcpy(
    char *restrict dst, const char *restrict src, size_t n)
{
    const char *const p = dst;
    while(n && (*dst++ = *src++))
        --n;
    return (size_t)(dst - p);
}