LeonMMcoset/cleonos
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Leonmmcoset
2026-04-18 14:29:24 +08:00
parent 6a93335e53
commit 6b3c74f66f
6 changed files with 240 additions and 138 deletions
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58
cleonos/c/apps/cat_main.c
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@@ -3,10 +3,8 @@
static int ush_cmd_cat(const ush_state *sh, const char *arg) {
char path[USH_PATH_MAX];
char buf[USH_CAT_MAX + 1ULL];
u64 size;
u64 req;
u64 got;
char buf[1024];
u64 fd;
if (arg == (const char *)0 || arg[0] == '\0') {
if (ush_pipeline_stdin_text != (const char *)0 && ush_pipeline_stdin_len > 0ULL) {
@@ -28,36 +26,38 @@ static int ush_cmd_cat(const ush_state *sh, const char *arg) {
return 0;
}
size = cleonos_sys_fs_stat_size(path);
if (size == (u64)-1) {
(void)puts("cat: failed to stat file");
fd = cleonos_sys_fd_open(path, CLEONOS_O_RDONLY, 0ULL);
if (fd == (u64)-1) {
(void)puts("cat: open failed");
return 0;
}
if (size == 0ULL) {
return 1;
}
req = (size < USH_CAT_MAX) ? size : USH_CAT_MAX;
got = cleonos_sys_fs_read(path, buf, req);
if (got == 0ULL) {
(void)puts("cat: read failed");
return 0;
}
if (got > USH_CAT_MAX) {
got = USH_CAT_MAX;
}
buf[got] = '\0';
(void)puts(buf);
if (size > got) {
(void)puts("[cat] output truncated");
for (;;) {
u64 got = cleonos_sys_fd_read(fd, buf, (u64)sizeof(buf));
u64 written_total = 0ULL;
if (got == (u64)-1) {
(void)cleonos_sys_fd_close(fd);
(void)puts("cat: read failed");
return 0;
}
if (got == 0ULL) {
break;
}
while (written_total < got) {
u64 written = cleonos_sys_fd_write(1ULL, buf + written_total, got - written_total);
if (written == (u64)-1 || written == 0ULL) {
(void)cleonos_sys_fd_close(fd);
(void)puts("cat: write failed");
return 0;
}
written_total += written;
}
}
(void)cleonos_sys_fd_close(fd);
return 1;
}