do not require argv[0], it is possible to only specify the file to run, and let argv be empty

Signed-off-by: Mattias Andrée <maandree@operamail.com>

4 files changed, 10 insertions, 12 deletions

diff --git a/README b/README
index a1fce3f..b162617 100644
--- a/README
+++ b/README
@@ -2,7 +2,7 @@ NAME
 	exec-as - exec(1) with explicit argv[0]
 
 SYNOPSIS
-	exec-as FILE ARGV0 [ARGV]...
+	exec-as FILE [ARGV0 [ARGV]...]
 
 DESCRIPTION
 	exec-as shall spawn the program FILE, using execvp(3),
@@ -10,7 +10,7 @@ DESCRIPTION
 	arguments for the following values in argv.
 
 NOTES
-	At least two arguments is required. Since this is not
+	At least one argument is required. Since this is not
 	a builtin function, it cannot be used as exec(1) without
 	arguments to set file descriptors.
 
diff --git a/doc/info/exec-as.texinfo b/doc/info/exec-as.texinfo
index e918650..69f8850 100644
--- a/doc/info/exec-as.texinfo
+++ b/doc/info/exec-as.texinfo
@@ -83,7 +83,7 @@ exec, you need to use @command{exec} too:
 @node Invoking
 @chapter Invoking
 
-At least two arguments are required. The first
+At least one argument are required. The first
 argument is the file to run. This can either
 be an absolute path, an explicitly relative path,
 or a file in @env{$PATH}. The second argument
diff --git a/doc/man/exec-as.1 b/doc/man/exec-as.1
index 27c4481..f66bb9d 100644
--- a/doc/man/exec-as.1
+++ b/doc/man/exec-as.1
@@ -4,8 +4,8 @@ exec-as - passphrase strength evaluator
 .SH SYNOPSIS
 .B exec-as
 .I FILE
-.I ARGV0
-.RI [ ARGV ]...
+.RI [ ARGV0
+.RI [ ARGV ]...]
 .SH DESCRIPTION
 .B exec-as
 shall spawn the program
@@ -19,7 +19,7 @@ as the value for
 and the following arguments for the following values in
 .BR argv .
 .SH NOTES
-At least two arguments is required. Since this is not
+At least one argument is required. Since this is not
 a builtin function, it cannot be used as
 .BR exec (1)
 without arguments to set file descriptors.
diff --git a/src/exec-as.c b/src/exec-as.c
index 9e5fbfe..842dc82 100644
--- a/src/exec-as.c
+++ b/src/exec-as.c
@@ -25,19 +25,17 @@ int main(int argc, char** argv)
   char* file;
   int i;
   
-  if (argc < 3)
+  if (argc < 2)
     {
       fprintf(stderr, "%s: %s", argc ? argv[0] : "exec-as",
-	      "Too few arguments, you need at least "
-	      "the file to run and its argv[0].");
+	      "Too few arguments, you need at least the file to run.");
       goto fail;
     }
   
   execname = argv[0];
-  file = argv[1];
   
-  for (i = 0; i < argc - 2; i++)
-    argv[i] = argv[i + 2];
+  for (i = 0; i < argc - 1; i++)
+    argv[i] = argv[i + 12];
   argv[i] = NULL;
   
   execvp(file, argv);