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Print file and linenum on errors

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Add more macros for printing errors
This commit is contained in:
Nikita Ivanov 2022-05-24 05:27:07 +05:00
parent ebee69678b
commit f37e3a1885
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GPG Key ID: 6E656AC5B97B5133
6 changed files with 62 additions and 34 deletions
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23
ctpv.c
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@ -1,7 +1,6 @@
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <magic.h>
@ -32,10 +31,10 @@ static void cleanup(void) {
static int init_magic()
{
ERRCHK_RET(!(magic = magic_open(MAGIC_MIME_TYPE)),
"magic_open() failed: %s", magic_error(magic));
ERRCHK_RET(!(magic = magic_open(MAGIC_MIME_TYPE)), FUNCFAILED("magic_open"),
magic_error(magic));
ERRCHK_RET(magic_load(magic, NULL) != 0, "magic_load() failed: %s",
ERRCHK_RET(magic_load(magic, NULL) != 0, FUNCFAILED("magic_load"),
magic_error(magic));
return OK;
@ -50,7 +49,7 @@ static const char *get_mimetype(char const *path)
{
const char *r = magic_file(magic, path);
if (!r) {
print_errorf("magic_file() failed: %s", magic_error(magic));
PRINTINTERR(FUNCFAILED("magic_file"), magic_error(magic));
return NULL;
}
@ -75,9 +74,15 @@ static const char *get_ext(char const *path)
static int check_file(char const *f)
{
ERRCHK_RET(!f, "file not given");
ERRCHK_RET(access(f, R_OK) != 0, "failed to access '%s': %s", f,
strerror(errno));
if (!f) {
print_error("file not given");
return ERR;
}
if (access(f, R_OK) != 0) {
print_errorf("failed to access '%s': %s", f, ERRNOS);
return ERR;
}
return OK;
}
@ -209,7 +214,7 @@ int main(int argc, char *argv[])
ret = mime(argc, argv);
break;
default:
print_errorf("unknowm mode: %d", ctpv.mode);
PRINTINTERR("unknowm mode: %d", ctpv.mode);
ret = ERR;
break;
}

33
error.h
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@ -1,19 +1,36 @@
#ifndef ERROR_H
#define ERROR_H
#define _ERRCHK_RET_PR(format, ...) \
print_error##__VA_OPT__(f)(format __VA_OPT__(, ) __VA_ARGS__)
#include <errno.h>
#include <string.h>
#include "utils.h"
#define ERRNOS strerror(errno)
#define FUNCFAILED(f) f "() failed: %s"
/*
* Print internal error
*/
#define PRINTINTERR(format, ...) \
print_error##__VA_OPT__(f)(ERRS(format) __VA_OPT__(, ) __VA_ARGS__)
/*
* Add error source to error message
*/
#define ERRS(msg) (__FILE__ ":" STRINGIZE(__LINE__) ": " msg)
/*
* If cond is true, return ERR. Also call print_error or
* print_errorf if error message or format string is given.
*/
#define ERRCHK_RET(cond, ...) \
do { \
if (cond) { \
__VA_OPT__(_ERRCHK_RET_PR(__VA_ARGS__);) \
return ERR; \
} \
#define ERRCHK_RET(cond, ...) \
do { \
if (cond) { \
__VA_OPT__(PRINTINTERR(__VA_ARGS__);) \
return ERR; \
} \
} while (0)
/*

6
prev/any.sh
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@ -1 +1,5 @@
exiftool "$f"
if exists exiftool; then
exiftool "$f"
else
cat "$f"
fi

16
preview.c
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@ -1,5 +1,4 @@
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "utils.h"
@ -41,7 +40,7 @@ void init_previews(Preview *ps, size_t len)
prevs = malloc(len * PREVP_SIZE);
if (!prevs) {
print_error("malloc() failed");
PRINTINTERR(FUNCFAILED("malloc"), ERRNOS);
abort();
}
@ -68,7 +67,7 @@ static void break_mimetype(char *mimetype, char **type, char **subtype)
char *s = strchr(mimetype, '/');
if (!s) {
print_errorf("invalid mimetype: '%s'", mimetype);
PRINTINTERR("invalid mimetype: '%s'", mimetype);
abort();
}
@ -107,7 +106,7 @@ static Preview *find_preview(char const *mimetype, char const *ext, size_t *i)
static void check_init_previews(void)
{
if (!prevs) {
print_error("init_previews() not called");
PRINTINTERR("init_previews() not called");
abort();
}
}
@ -121,10 +120,11 @@ static int run(Preview *p, int *exitcode)
return spawn(args, NULL, exitcode, fds);
}
#define SET_PENV(n, v) \
do { \
if (v) \
ERRCHK_RET(setenv((n), (v), 1) != 0); \
#define SET_PENV(n, v) \
do { \
if (v) \
ERRCHK_RET(setenv((n), (v), 1) != 0, FUNCFAILED("setenv"), \
ERRNOS); \
} while (0)
int run_preview(const char *ext, const char *mimetype, PreviewArgs *pa)

15
utils.c
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@ -1,7 +1,6 @@
#include <errno.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>
#include "error.h"
@ -24,7 +23,7 @@ int spawn(char *args[], pid_t *cpid, int *exitcode, int *fds[2])
*exitcode = -1;
pid_t pid = fork();
ERRCHK_RET(pid == -1, "fork() failed");
ERRCHK_RET(pid == -1, FUNCFAILED("fork"), ERRNOS);
/* Child process */
if (pid == 0) {
@ -39,7 +38,7 @@ int spawn(char *args[], pid_t *cpid, int *exitcode, int *fds[2])
}
execvp(args[0], args);
print_errorf("exec() failed: %s", strerror(errno));
PRINTINTERR(FUNCFAILED("exec"), ERRNOS);
exit(EXIT_FAILURE);
}
@ -47,8 +46,8 @@ int spawn(char *args[], pid_t *cpid, int *exitcode, int *fds[2])
*cpid = pid;
} else {
int stat;
ERRCHK_RET(waitpid(pid, &stat, 0) == -1, "waitpid() failed: %s",
strerror(errno));
ERRCHK_RET(waitpid(pid, &stat, 0) == -1, FUNCFAILED("waitpid"),
ERRNOS);
if (exitcode && WIFEXITED(stat))
*exitcode = WEXITSTATUS(stat);
@ -93,7 +92,7 @@ void char_v_append(CharVec *v, char c)
if (!v->buf) {
v->buf = malloc(v->cap * sizeof(v->buf[0]));
if (!v->buf) {
print_error("calloc() failed");
PRINTINTERR(FUNCFAILED("malloc"), ERRNOS);
abort();
}
v->buf[0] = '\0';
@ -104,7 +103,7 @@ void char_v_append(CharVec *v, char c)
v->cap *= 2;
v->buf = realloc(v->buf, v->cap * sizeof(v->buf[0]));
if (!v->buf) {
print_error("realloc() failed");
PRINTINTERR(FUNCFAILED("realloc"), ERRNOS);
abort();
}
}

3
utils.h
View File

@ -8,6 +8,9 @@
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define STRINGIZE(x) STRINGIZE2(x)
#define STRINGIZE2(x) #x
#define FORMATTED_STRING(arr, format) \
do { \
va_list args; \