snark13
737c974400
- Split tests/ (libc feature tests) and examples/ (real apps); shared
app.mk in repo root, was examples/example.mk
- libc/io/* split into libc/{conio,env,errno,file,mouse,string,sys,
time,video}/ — clearer module boundaries
- New examples/mdview/: markdown viewer (Phases 1-5 + light nested
lists). Headers (H1-H4), HR, ulist/olist/quote with nesting via
leading spaces, fenced code blocks, inline emphasis (bold/italic/
underscore/code), wrap/unwrap mode with soft wrap (F2), horizontal
pan (← →) with '>' truncation indicator
- libc additions: scroll() in conio (ESTEX SCROLL), strlwr/strupr,
gets() test
- Makefile updates across tests/ for the new shared app.mk path
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
|
|
/*
|
|
* Exercises errno + strerror + perror by triggering each failure path.
|
|
* No file system mutations are required — every call here is expected
|
|
* to fail by design.
|
|
*/
|
|
|
|
int main(void)
|
|
{
|
|
puts("errno test:");
|
|
puts("");
|
|
|
|
/* 1. Open a file that does not exist. */
|
|
errno = 0;
|
|
int fd = open("NOSUCH.TXT", O_RDONLY);
|
|
printf(" open(\"NOSUCH.TXT\"): fd=%d errno=%d %s\n",
|
|
fd, errno, strerror(errno));
|
|
|
|
/* 2. Close a bogus file descriptor. */
|
|
errno = 0;
|
|
int r = close(0x7F);
|
|
printf(" close(0x7F): ret=%d errno=%d %s\n", r, errno, strerror(errno));
|
|
|
|
/* 3. perror() — convenience wrapper. */
|
|
errno = 0;
|
|
fd = open("ANOTHER.MIS", O_RDONLY);
|
|
perror(" open(\"ANOTHER.MIS\")");
|
|
|
|
/* 4. Delete something that isn't there. */
|
|
errno = 0;
|
|
r = unlink("PHANTOM.TMP");
|
|
perror(" unlink(\"PHANTOM.TMP\")");
|
|
|
|
/* 5. A few raw codes for the table. */
|
|
puts("");
|
|
puts(" raw codes:");
|
|
for (int i = 0; i <= 5; i++) {
|
|
printf(" %2d → %s\n", i, strerror(i));
|
|
}
|
|
printf(" %2d → %s (out of range)\n", 99, strerror(99));
|
|
|
|
puts("");
|
|
puts("Press any key to exit.");
|
|
(void)getchar();
|
|
return 0;
|
|
}
|