builtin-mailinfo.c: check error status from rewind and ftruncate
[git/spearce.git] / editor.c
blob4d469d076bcd58df3af16d98adc9120e34765944
1 #include "cache.h"
2 #include "strbuf.h"
3 #include "run-command.h"
5 int launch_editor(const char *path, struct strbuf *buffer, const char *const *env)
7 const char *editor, *terminal;
9 editor = getenv("GIT_EDITOR");
10 if (!editor && editor_program)
11 editor = editor_program;
12 if (!editor)
13 editor = getenv("VISUAL");
14 if (!editor)
15 editor = getenv("EDITOR");
17 terminal = getenv("TERM");
18 if (!editor && (!terminal || !strcmp(terminal, "dumb")))
19 return error("Terminal is dumb but no VISUAL nor EDITOR defined.");
21 if (!editor)
22 editor = "vi";
24 if (strcmp(editor, ":")) {
25 size_t len = strlen(editor);
26 int i = 0;
27 int failed;
28 const char *args[6];
29 struct strbuf arg0 = STRBUF_INIT;
31 if (strcspn(editor, "$ \t'") != len) {
32 /* there are specials */
33 strbuf_addf(&arg0, "%s \"$@\"", editor);
34 args[i++] = "sh";
35 args[i++] = "-c";
36 args[i++] = arg0.buf;
38 args[i++] = editor;
39 args[i++] = path;
40 args[i] = NULL;
42 failed = run_command_v_opt_cd_env(args, 0, NULL, env);
43 strbuf_release(&arg0);
44 if (failed)
45 return error("There was a problem with the editor '%s'.",
46 editor);
49 if (!buffer)
50 return 0;
51 if (strbuf_read_file(buffer, path, 0) < 0)
52 return error("could not read file '%s': %s",
53 path, strerror(errno));
54 return 0;