bore

commit bdc41a7cab8a0a5b7910a9008fb486fee81b687d
parent 72b1e3bf54006965fd53dc800515465048f48836
Author: phoebos <ben@bvnf.space>
Date:   Thu,  3 Nov 2022 13:17:34 +0000

basename: add

Diffstat:
M
.gitignore
 | 
1
+
M
Makefile
 | 
1
+
M
PROGRESS
 | 
1
+
M
TODO.posix
 | 
2
+-
A
basename.c
 | 
25
+++++++++++++++++++++++++

5 files changed, 29 insertions(+), 1 deletion(-)
diff --git a/.gitignore b/.gitignore
@@ -1,3 +1,4 @@
+basename
 cat
 echo
 ed
diff --git a/Makefile b/Makefile
@@ -1,6 +1,7 @@
 .POSIX:
 
 BINS = \
+	basename \
 	cat \
 	echo \
 	ed \
diff --git a/PROGRESS b/PROGRESS
@@ -2,6 +2,7 @@
 # Any additional commands come afterwards.
 # An [x] in the box indicates an essentially completed program.
 
+[x] basename
 [x] cat [-u]
 [ ] chmod
 [ ] chown
diff --git a/TODO.posix b/TODO.posix
@@ -2,7 +2,7 @@
 [ ] ar
 [ ] asa
 [ ] awk
-[ ] basename
+[x] basename
 [ ] bc
 [ ] c99
 [ ] cal
diff --git a/basename.c b/basename.c
@@ -0,0 +1,25 @@
+#include <libgen.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+main(int argc, char **argv) {
+    char *base, *suffix;
+
+    // TODO: handle `basename -- string`
+    if (argc < 2 || argc > 3) {
+        fprintf(stderr, "usage: %s string [suffix]\n", argv[0]);
+        return 1;
+    }
+
+    base = basename(argv[1]);
+    if (argc == 3) {
+        suffix = strstr(base, argv[2]);
+        if (suffix != NULL)
+            *suffix = '\0';
+    }
+
+    printf("%s\n", base);
+    return 0;
+}