mirrors/haproxy
1
0
Fork 0
mirror of https://git.haproxy.org/git/haproxy.git/ synced 2025-08-06 07:07:04 +02:00
Code Issues Projects Releases Wiki Activity

MINOR: tools: add a few functions to simply check for a file's existence

Browse Source 
At many places we'd like to be able to simply construct a path from a
format string and check if that path corresponds to an existing file,
directory etc. Here we add 3 functions, a generic one to test that a
path corresponds to a given file mode (e.g. S_IFDIR, S_IFREG etc), and
two other ones specifically checking for a file or a dir for easier
use.
This commit is contained in:
Willy Tarreau 2025-01-06 19:34:41 +01:00
parent b9cc361b35
commit b25850f25b
2 changed files with 67 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/haproxy/tools.h
View File

@ -1020,6 +1020,9 @@ int my_unsetenv(const char *name);
* some expansion is made.
*/
char *env_expand(char *in);
int is_path_mode(mode_t mode, const char *path_fmt, ...);
int is_file_present(const char *path_fmt, ...);
int is_dir_present(const char *path_fmt, ...);
uint32_t parse_line(char *in, char *out, size_t *outlen, char **args, int *nbargs, uint32_t opts, const char **errptr);
ssize_t read_line_to_trash(const char *path_fmt, ...);
size_t sanitize_for_printing(char *line, size_t pos, size_t width);

64
src/tools.c
View File

@ -5975,6 +5975,70 @@ void ha_generate_uuid_v7(struct buffer *output)
}
/* See is_path_mode(). This version is for internal use and uses a va_list. */
static int _is_path_mode(mode_t mode, const char *path_fmt, va_list args)
{
struct stat file_stat;
ssize_t ret;
chunk_reset(&trash);
ret = vsnprintf(trash.area, trash.size, path_fmt, args);
if (ret >= trash.size)
return 0;
if (stat(trash.area, &file_stat) != 0)
return 0;
return (file_stat.st_mode & S_IFMT) == mode;
}
/* Use <path_fmt> and following arguments as a printf format to build up the
* name of a file, which will be checked for existence and for mode matching
* <mode> among S_IF*. On success, non-zero is returned. On failure, zero is
* returned. The trash is destroyed.
*/
int is_path_mode(mode_t mode, const char *path_fmt, ...)
{
va_list args;
int ret;
va_start(args, path_fmt);
ret = _is_path_mode(mode, path_fmt, args);
va_end(args);
return ret;
}
/* Use <path_fmt> and following arguments as a printf format to build up the
* name of a file, which will be checked for existence. On success, non-zero
* is returned. On failure, zero is returned. The trash is destroyed.
*/
int is_file_present(const char *path_fmt, ...)
{
va_list args;
int ret;
va_start(args, path_fmt);
ret = _is_path_mode(S_IFREG, path_fmt, args);
va_end(args);
return ret;
}
/* Use <path_fmt> and following arguments as a printf format to build up the
* name of a directory, which will be checked for existence. On success, non-zero
* is returned. On failure, zero is returned. The trash is destroyed.
*/
int is_dir_present(const char *path_fmt, ...)
{
va_list args;
int ret;
va_start(args, path_fmt);
ret = _is_path_mode(S_IFDIR, path_fmt, args);
va_end(args);
return ret;
}
/* only used by parse_line() below. It supports writing in place provided that
* <in> is updated to the next location before calling it. In that case, the
* char at <in> may be overwritten.