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u3: updates u3m_jam_file to return errors

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This commit is contained in:
Joe Bryan 2019-11-21 21:43:43 -08:00
parent 4fffaaceea
commit dc9fb9481f
2 changed files with 31 additions and 16 deletions
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2
pkg/urbit/include/noun/manage.h
View File

@ -48,7 +48,7 @@
/* u3m_jam_file(): jam [a] into a file, overwriting
*/
void
c3_o
u3m_jam_file(u3_noun a, c3_c* pas_c);
/* u3m_error(): bail out with %exit, ct_pushing error.

41
pkg/urbit/noun/manage.c
View File

@ -430,25 +430,25 @@ u3m_file(c3_c* pas_c)
/* u3m_jam_file(): jam [a] into a file, overwriting
*/
void
c3_o
u3m_jam_file(u3_noun a, c3_c* pas_c)
{
u3p(u3h_root) bak_p;
c3_i fid_i = open(pas_c, O_RDWR | O_CREAT | O_TRUNC, 0644);
c3_w byt_w, wor_w, len_w;
// XX mkdirp
//
if ( fid_i < 0 ) {
fprintf(stderr, "jam: open %s: %s\r\n", pas_c, strerror(errno));
u3m_bail(c3__fail);
return c3n;
}
{
c3_d len_d = u3s_jam_met(a, &bak_p);
if ( len_d > 0xffffffffULL ) {
u3m_bail(c3__fail);
fprintf(stderr, "jam: overflow c3_w: %" PRIu64 "\r\n", len_d);
u3h_free(bak_p);
return c3n;
}
// length in bytes a la u3i_bytes
@ -473,8 +473,8 @@ u3m_jam_file(u3_noun a, c3_c* pas_c)
// grow [fid_i] to [len_w]
//
if ( 0 != ftruncate(fid_i, len_w) ) {
fprintf(stderr, "jam: ftruncate 1 %s: %s\r\n", pas_c, strerror(errno));
u3m_bail(c3__fail);
fprintf(stderr, "jam: ftruncate grow %s: %s\r\n", pas_c, strerror(errno));
goto error;
}
// mmap [fid_i], jam into it, sync, and unmap
@ -485,7 +485,7 @@ u3m_jam_file(u3_noun a, c3_c* pas_c)
if ( MAP_FAILED == ptr_v ) {
fprintf(stderr, "jam: mmap %s: %s\r\n", pas_c, strerror(errno));
u3m_bail(c3__fail);
goto error;
}
buf_w = ptr_v;
@ -493,24 +493,39 @@ u3m_jam_file(u3_noun a, c3_c* pas_c)
if ( 0 != msync(ptr_v, len_w, MS_SYNC) ) {
fprintf(stderr, "jam: msync %s: %s\r\n", pas_c, strerror(errno));
u3m_bail(c3__fail);
// XX ignore return?
//
munmap(ptr_v, len_w);
goto error;
}
if ( 0 != munmap(ptr_v, len_w) ) {
fprintf(stderr, "jam: msync 1 %s: %s\r\n", pas_c, strerror(errno));
u3m_bail(c3__fail);
fprintf(stderr, "jam: munmap %s: %s\r\n", pas_c, strerror(errno));
// XX fatal error?
//
goto error;
}
}
// shrink [fid_i] to [byt_w]
//
if ( 0 != ftruncate(fid_i, byt_w) ) {
fprintf(stderr, "jam: ftruncate 2 %s: %s\r\n", pas_c, strerror(errno));
u3m_bail(c3__fail);
fprintf(stderr, "jam: ftruncate shrink %s: %s\r\n", pas_c, strerror(errno));
goto error;
}
{
close(fid_i);
u3h_free(bak_p);
return c3y;
}
error: {
close(fid_i);
unlink(pas_c);
u3h_free(bak_p);
return c3n;
}
}
/* _find_north(): in restored image, point to a north home.