[PATCH] shadow: Implement putspent

[Michael Forney <mforney@mforney.org>]

---
When I brought up implementing the shadow.h functions on IRC, several concerns
were raised. However, it turns out that the shadow package only requires
putspent. I didn't understand the concerns on IRC, so if there is an issue with
the implementation of this function, please let me know and hopefully I'll be
able to address it.

 src/passwd/fgetspent.c |  5 -----
 src/passwd/putspent.c  | 30 ++++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 5 deletions(-)
 create mode 100644 src/passwd/putspent.c

diff --git a/src/passwd/fgetspent.c b/src/passwd/fgetspent.c
index a9a3c97..3dda784 100644
--- a/src/passwd/fgetspent.c
+++ b/src/passwd/fgetspent.c
@@ -4,8 +4,3 @@ struct spwd *fgetspent(FILE *f)
 {
 	return 0;
 }
-
-int putspent(const struct spwd *sp, FILE *f)
-{
-	return -1;
-}
diff --git a/src/passwd/putspent.c b/src/passwd/putspent.c
new file mode 100644
index 0000000..bb0a410
--- /dev/null
+++ b/src/passwd/putspent.c
@@ -0,0 +1,30 @@
+#include <shadow.h>
+#include <stdio.h>
+
+int putspent(const struct spwd *sp, FILE *f)
+{
+	flockfile(f);
+	if (sp->sp_namp && fputs(sp->sp_namp, f) == EOF) goto fail;
+	if (fputc(':', f) == EOF) goto fail;
+	if (sp->sp_pwdp && fputs(sp->sp_pwdp, f) == EOF) goto fail;
+	if (fputc(':', f) == EOF) goto fail;
+	if (sp->sp_lstchg != -1 && fprintf(f, "%d", sp->sp_lstchg) < 0) goto fail;
+	if (fputc(':', f) == EOF) goto fail;
+	if (sp->sp_min != -1 && fprintf(f, "%d", sp->sp_min) < 0) goto fail;
+	if (fputc(':', f) == EOF) goto fail;
+	if (sp->sp_max != -1 && fprintf(f, "%d", sp->sp_max) < 0) goto fail;
+	if (fputc(':', f) == EOF) goto fail;
+	if (sp->sp_warn != -1 && fprintf(f, "%d", sp->sp_warn) < 0) goto fail;
+	if (fputc(':', f) == EOF) goto fail;
+	if (sp->sp_inact != -1 && fprintf(f, "%d", sp->sp_inact) < 0) goto fail;
+	if (fputc(':', f) == EOF) goto fail;
+	if (sp->sp_expire != -1 && fprintf(f, "%d", sp->sp_expire) < 0) goto fail;
+	if (fputc(':', f) == EOF) goto fail;
+	if (sp->sp_flag != -1 && fprintf(f, "%d", sp->sp_flag) < 0) goto fail;
+	if (fputc('\n', f) == EOF) goto fail;
+	funlockfile(f);
+	return 0;
+fail:
+	funlockfile(f);
+	return -1;
+}
-- 
1.8.4.2