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Add error handling helper functions

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GitOrigin-RevId: 9cfe2133b3494b0a676e5d1ee4fac11562eb18d0
This commit is contained in:
Dietrich Epp 2021-03-07 16:42:06 -05:00
parent 00d3419f62
commit 1264148f6d
1 changed files with 30 additions and 8 deletions
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38
sync.c
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@ -2,13 +2,32 @@
#include <MacMemory.h>
#include <StringCompare.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
static void print_err(const char *msg, ...) {
va_list ap;
fputs("## Error: ", stderr);
va_start(ap, msg);
vfprintf(stderr, msg, ap);
va_end(ap);
fputc('\n', stderr);
}
static void print_errcode(OSErr err, const char *msg, ...) {
va_list ap;
fputs("## Error: ", stderr);
va_start(ap, msg);
vfprintf(stderr, msg, ap);
va_end(ap);
fprintf(stderr, ": err=%d\n", err);
}
static int c2pstr(Str255 ostr, const char *istr) {
size_t n = strlen(istr);
if (n > 255) {
fprintf(stderr, "## Error: path too long: %s\n", istr);
print_err("path too long: %s", istr);
return 1;
}
ostr[0] = n;
@ -95,7 +114,11 @@ static int dir_from_path(short *vRefNum, long *dirID, const char *dirpath) {
}
err = FSMakeFSSpec(0, 0, ppath, &spec);
if (err != 0) {
fprintf(stderr, "## Error: FSMakeFSSpec: %d\n", err);
if (err == fnfErr) {
print_err("does not exist: %s", dirpath);
} else {
print_errcode(err, "FSMakeFSSpec");
}
return 1;
}
memset(&ci, 0, sizeof(ci));
@ -104,11 +127,11 @@ static int dir_from_path(short *vRefNum, long *dirID, const char *dirpath) {
ci.dirInfo.ioDrDirID = spec.parID;
err = PBGetCatInfoSync(&ci);
if (err != 0) {
fprintf(stderr, "## Error: PBGetCatInfoSync: %d\n", err);
print_errcode(err, "PBGetCatInfoSync");
return 1;
}
if ((ci.dirInfo.ioFlAttrib & kioFlAttribDirMask) == 0) {
fprintf(stderr, "## Error: not a directory: %s\n", dirpath);
print_err("not a directory: %s", dirpath);
return 1;
}
*vRefNum = ci.dirInfo.ioVRefNum;
@ -162,8 +185,7 @@ static int list_dir(short vRefNum, long dirID, int which) {
if (err == fnfErr) {
break;
}
fprintf(stderr, "## Error: could not list directory (err = %d)\n",
err);
print_errcode(err, "could not list directory");
continue;
}
if ((ci.hFileInfo.ioFlAttrib & kioFlAttribDirMask) == 0 &&
@ -188,7 +210,7 @@ static int command_main(char *destpath) {
err = HGetVol(NULL, &srcVol, &srcDir);
if (err != 0) {
fprintf(stderr, "## Error: HGetVol: %d\n", err);
print_errcode(err, "HGetVol");
return 1;
}
r = dir_from_path(&destVol, &destDir, destpath);
@ -204,7 +226,7 @@ static int command_main(char *destpath) {
return 1;
}
if (gFileCount == 0) {
fputs("## Error: no files\n", stderr);
print_err("no files");
return 1;
}
HLock(gFiles);